| 1. |
- Dahlström, Carolin, et al.
(författare)
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Uni- and bimanual goal-directed arm movement organization in children at 6-9 years : Effects of a preterm birth
- 2014
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Ingår i: Congress Programme. 1st Clinical Movement Analysis Word Conference. ; , s. 110-110
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Konferensbidrag (refereegranskat)abstract
- INTRODUCTION and AIMPsychomotor deficits are more commonly reported among children born preterm (PT) than those born full-term (FT). Further, evidence exists for more covert motor problems in children born preterm at school age [1]. Such findings may be associated with a more immature spatiotemporal model of movements and lower cognitive functioning in children born PT than FT [2]. The main aim of this study was to investigate the effects of gestational age (GA) on uni- and bimanual goal-directed arm movement organization and on cognitive functioning in children at school age.PATIENTS/MATERIALS and METHODSParticipants consisted of 88 children between 6-9 years of age (M = 7.7 years; 40 PT, 19 girls; 48 FT, 22 girls) without known developmental delays or deviations. Children born PT were divided into two subgroups: moderately PT (M-PT), 34-36 weeks’ gestation (GW), and very PT (V-PT), < 34 GW. Movement kinematics were examined during performance of a goal-directed task, where the participants pushed three buttons in a sequential order in two different directions (vertical or horizontal) with either the right or left hand (unimanual) and with both hands simultaneously (bimanual). Movements were recorded by a 6-camera movement registration system (240Hz, ProReflex) and the number of movement units (MUs) was derived from head, shoulders, elbow, and wrist movement velocity profiles. Cognitive function in terms of verbal IQ (VIQ) and full scale IQ (FSIQ) was measured by the Wechsler Intelligence Scale for Children, 4th edition (WISC-IV).RESULTSOverall, a significant difference between the groups regarding number of MUs and FSIQ was found. In general, children born V-PT showed more MUs compared with the FT and M-PT group. Regardless of group, a significant higher amount of MUs was found in the bimanual condition than in the unimanual, and during horizontal movement performance in comparison with vertical. Furthermore, GA was significant negatively correlated with number of MUs for right and left wrist and right elbow, and also with FSIQ.DISCUSSION and CONCLUSIONSThese findings suggest that lower GAs are associated with both more segmented goal-directed arm movements as well as with lower general cognitive ability. During the more demanding tasks, i.e. bimanual and horizontal movements, this association became particularly evident, where the children born V-PT exhibited the greatest difficulties. Thus, this indicate immature spatio-temporal movement organization as a long-lasting effect of risk factors associated with a preterm birth, specifically for children born V-PT, that may be related to lower cognitive function. Further, limitations in kinematic degrees of freedom, leading to restricted amounts of solutions when solving a motor task, may also partly explain these findings.REFERENCES[1] Bracewell, M. & Marlow, N. (2002). Patterns of motor disability in very preterm children. Mental Retardation and Developmental Disabilities Research Reviews, 8(4), 241-248.[2] Domellöf, E., Johansson, A-M., Farooqi, A., Domellöf M. & Rönnqvist, L. (2013). Relations among upper-limb movement organization and cognitive function at school age in children born preterm. Journal of Developmental & Behavioral Pediatrics, 34(5), 344-352.
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| 2. |
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| 3. |
- Domellöf, Erik, 1970-, et al.
(författare)
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Atypical functional lateralization in children with fetal alcohol syndrome
- 2009
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Ingår i: Developmental Psychobiology. - : Wiley Periodicals, Inc. - 0012-1630 .- 1098-2302. ; 51:8, s. 696-705
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Tidskriftsartikel (refereegranskat)abstract
- In order to explore effects of prenatal alcohol exposure on functional lateralization, item tasks measuring preferences of hand, foot, eye, and ear were administered to a sample of 23 children diagnosed with fetal alcohol syndrome (FAS) compared with typically developing (TD) children. In addition, a dichotic listening task was administered to a subsample of 11 children with FAS and a TD group of comparable age, sex and handedness. The children with FAS were characterized by increased nonright-handedness compared with TD children. No differences were evident for preferential use of foot, eye, or ear. Moreover, children with FAS displayed more right ear extinctions during dichotic listening relative to TD children, indicating a lack of right ear advantage. The results add to findings of decreased manual asymmetry and less left-lateralized speech perception in children with developmental disorders, and are further discussed in relation to the high incidence of callosal abnormalities in alcohol-exposed children.
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| 4. |
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| 5. |
- Domellöf, Erik, 1970-, et al.
(författare)
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Functional asymmetries in the stepping response of the human newborn : a kinematic approach
- 2007
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Ingår i: Experimental Brain Research. - : Springer Berlin/Heidelberg. - 0014-4819 .- 1432-1106. ; 177:3, s. 324-335
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Tidskriftsartikel (refereegranskat)abstract
- In order to investigate subtle expressions of functional asymmetries in newborn leg movements, kinematic registrations were made on a sample of 40 healthy fullterm newborn infants during performance of the stepping response. Time–position data were collected from markers attached to the hip, knee and ankle joints of the left and right leg, and movements of both legs recorded simultaneously. Findings included evident side differences in terms of smoother trajectories of the right leg as a consequence of less movement segmentation compared to the left leg. Additionally, analyses of intralimb coordination revealed side differences with regard to stronger ankle–knee couplings and smaller phase shifts in the right leg. The findings suggest that asymmetries in newborn stepping responses are present in terms of spatio-temporal parameters and intralimb coordination. No evidence of a lateral preference in terms of frequency of the first foot moved was found. The present study adds new understanding to the lateralized attributes of the stepping response in the human newborn and as such points to new directions of research on the nature of laterality in the future.
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| 6. |
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| 7. |
- Domellöf, Erik, 1970-, et al.
(författare)
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Goal-directed arm movements in children with fetal alcohol syndrome : a kinematic approach
- 2011
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Ingår i: European Journal of Neurology. - : Wiley. - 1351-5101 .- 1468-1331. ; 18:2, s. 312-320
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Tidskriftsartikel (refereegranskat)abstract
- Background: Although many studies have documented deficits in general motor functioning in children with fetal alcohol syndrome (FAS), few have employed detailed measurements to explore the specific nature of such disabilities. This pilot study explores whether three-dimensional (3D) kinematic analysis may generate increased knowledge of the effect of intrauterine alcohol exposure on motor control processes by detecting atypical upper-limb movement pattern specificity in children with FAS relative to typically developing (TD) children. Methods: Left and right arm and head movements during a sequential unimanual goal-directed precision task in a sample of children with FAS and in TD children were registered by an optoelectronic tracking system (ProReflex, Qualisys Inc.). Results: Children with FAS demonstrated evidently poorer task performance compared with TD children. Additionally, analyses of arm movement kinematics revealed atypical spatio-temporal organization in the children with FAS. In general, they exhibited longer arm movement trajectories at both the proximal and distal level, faster velocities at the proximal level but slower at the distal level, and more segmented distal movements. Children with FAS also showed atypically augmented and fast head movements during the task performance. Conclusions: Findings indicate neuromotor deficits and developmental delay in goaldirected arm movements because of prenatal alcohol exposure. It is suggested that 3D kinematic analysis is a valid technique for furthering the understanding of motor control processes in children with FAS/fetal alcohol spectrum disorders. A combination with relevant neuroimaging techniques in future studies would enable a more clear-cut interpretation of how atypical movement patterns relate to underlying brain abnormalities.
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| 8. |
- Domellöf, Erik, 1970-, et al.
(författare)
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Handedness in preterm born children : a systematic review and a meta-analysis
- 2011
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Ingår i: Neuropsychologia. - : Elsevier. - 0028-3932 .- 1873-3514. ; 49:9, s. 2299-2310
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Tidskriftsartikel (refereegranskat)abstract
- It has been proposed that left and/or non-right handedness (NRH) is over-represented in children with a history of preterm birth because such births are associated with a greater incidence of insult to the brain. We report an approximate two-fold increase in left and/or non-right handedness based on a systematic search of the literature from 1980 to September 2010 for English-language articles reporting handedness status in preterm children compared with fullterm controls either as a main focus of the study or as a secondary finding. In total, thirty articles met the inclusion criteria. However, there was a great variation between the included studies in terms of objectives, population characteristics, sample size and methodologies used. While the majority of studies reported a higher incidence of NRH in preterm than fullterm children, this was not a consistent finding. A quality assessment was made to explore the differences in overall study quality and handedness assessment methodology between studies. A random-effects model meta-analysis was then performed to estimate the accumulated effect of preterm birth on handedness (18 studies; 1947 cases and 8170 controls). Preterm children displayed a significantly higher occurrence of NRH than fullterm children (odds ratio [OR]: 2.12; 95% confidence interval [CI]: 1.59–2.78). Sources of heterogeneity were investigated by supplementary meta-analyses considering studies with high or low overall and handedness assessment quality. Publication bias was assessed by Egger’s test of the intercept and Duvall and Tweedie’s trim-and-fill method. The outcomes of these procedures did not jeopardize the overall finding of reliably increased OR for NRH in preterm children. The present review suggests that a preterm birth is indeed associated with a greater than two-fold likelihood of NRH. Several studies also explored the relationship between handedness and neuropsychological functioning (cognition mainly) with an array of methods. Although not without disagreement, this association was found to be concordant. Studying handedness in preterm children, therefore, is a potentially important index of hemispheric organization and cognitive and sensory–motor functions following neurodevelopmental disturbance.
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| 9. |
- Domellöf, Erik, 1970-, et al.
(författare)
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Impairment severity selectively affects the control of proximaland distal components of reaching movements in children with hemiplegic cerebral palsy
- 2009
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Ingår i: Developmental Medicine & Child Neurology. - : Mac Keith Press. - 0012-1622 .- 1469-8749. ; 51:10, s. 807-816
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Tidskriftsartikel (refereegranskat)abstract
- This study explored proximal-to-distal components during goal-directed reaching movements in children with mild or moderate hemiplegic cerebral palsy (HCP); [seven females, fourmales;mean age 8y 6mo; SD 27mo], compared with age-matched, typically developing children (seven females, fivemales; mean age 8y 3mo [SD 25mo]. Severity of HCP was assessed following the approach of Claeys et al. Optoelectronic registrations were made during unimanual reaching-to-grasp and reaching-to-hit movements with both the affected non-preferred and unaffected with HCP, particularly those withmoderate impairment, displayed less optimal spatiotemporal organization of movements performed with the affected arm. Compared with the goal to hit, and increasingly with more severe impairment, children with HCP adapted to the goal to grasp by recruiting augmented shoulder movements when reaching with the affected side. A resulting impact on distal kinematics was found in shorter, straighter, and less segmentedmovement paths. Thus, depending on severity of hemispheric lesions and task complexity, unilateral brain injuries in HCPmay selectively affect neural pathways underlying both proximal and distal arm movement control. Levels of both ipsi- and ontralateral activation in relation to side and lesion severity should be considered in future studies on prehension movements in HCP.
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| 10. |
- Domellöf, Erik, 1970-, et al.
(författare)
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Kinematic measurement of goal-directed arm movements in children with fetal alcohol syndrome : A preliminary study
- 2008
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Ingår i: Developmental Medicine and Child Neurology, 50 (Suppl. 114), Kroatien 5-7 juni, 2008. - : Wiley Online Library. ; , s. 31-32
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Konferensbidrag (refereegranskat)abstract
- Objective: Inadequate nutritional status can lead to several preventable developmental disorders. Populations living at high altitude are particularly at risk. Our aim is to contribute to the general knowledge of nutritional status of children in Ladakh.Method: Review of the literature concerning nutritional status in micronutrients, especially among children living in the Himalayan regions.Results: Iodine deficiency is the most common cause in the world of preventable learning disability*. Although the extension of severe endemic areas has been reduced, it is estimated that around 200 million people in the world are still living in remote places at risk of severe iodine deficiency. A recent survey in the ‘sub-Himalayan goiter belt’ indicates that iodine deficiency continues to threaten the health of this population.Studies in the Kashmir Valley found that, despite abundant sunlight, vitamin D deficiency is highly prevalent. Vitamin A deficiency (VAD) is a well-known cause of child morbidity and mortality and of visual defect. In India, 52,000 children go blind every year on account of VAD, and vitamin A supplementation programs are ongoing. VAD and iodine deficiency disorders (IDD) often coexist in vulnerable groups. In Africa it was shown that in IDD- and VAD-affected children receiving iodized salt and concurrent vitamin A supplementation improves iodine efficacy. In the Tibet Autonomous Region the nutritional status of children is deficient in proteins, iodine, selenium, calcium, and vitamins A and D. Interaction between iron and VAD is well known as well.Conclusions: To our knowledge, data concerning nutritional status of children living in Ladakh are lacking. Micronutrient deficiency is a public health concern that has lead to supplementation programmes. As interactions between several micronutrients have been evidenced, more integrated, multifaceted programmes are needed. Despite significant progress in many regions, continuing efforts are needed to reach underserved populations.
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| 11. |
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| 12. |
- Domellöf, Erik, 1970-, et al.
(författare)
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Relations Among Upper-Limb Movement Organization and Cognitive Function at School Age in Children Born Preterm
- 2013
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Ingår i: Journal of Developmental and Behavioral Pediatrics. - : Lippincott Williams & Wilkins. - 0196-206X .- 1536-7312. ; 34:5, s. 344-352
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Tidskriftsartikel (refereegranskat)abstract
- Objective: To explore relations between aspects of upper-body spatiotemporal movement organization and intelligence in children born preterm at school age.Methods: Three-dimensional (3D) kinematic recordings of arm and head movements during a unimanual precision task were related to performance on the Wechsler Intelligence Scale for Children, 4th edition, in a sample of 32 children born preterm (gestational age, mean: 31.5 weeks [range: 22-35 weeks]; birth weight, mean: 1699 g [range: 404-2962 g]) at 6 years to 8 years with no diagnosed cognitive, sensory, or motor impairments compared with 40 age-matched control children born fullterm.Results: In the children born preterm, upper-limb movement duration and segmentation of movement trajectories were significantly associated with full-scale intelligence quotient independent of gestational age (GA) and sex. These effects pertained to the preferred side, characterized by more effective movement organization being linked with increased intelligence scores. The same relations were not seen in the controls. Within the children born preterm, a significant effect of GA was also found for some aspects of upper-limb movement organization. Full-scale intelligence quotient was within normal limits for both groups but significantly lower in the preterm (mean: 94.5 [range: 72-120]) compared with the fullterm (mean: 101.7 [range: 76-119]) born children.Conclusions: The findings demonstrate that, independent of GA, the spatiotemporal organization of upper-limb movements is partly associated with cognitive performance in children born preterm.
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| 13. |
- Domellöf, Erik, 1970-, et al.
(författare)
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Relations between cognitive performance and movement organization in preterm children at 6 to 8 years old
- 2011
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Ingår i: Developmental Medicine and Child Neurology, 53 (Suppl. s3). - : Wiley-Blackwell. - 0012-1622. ; , s. 45-45
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Konferensbidrag (refereegranskat)abstract
- Objectives: To explore the relations between cognitive performance and spatio-temporal organization of upper-body movements in preterm children at school age compared with full-term peers.Background: Neuromotor disabilities and lowered cognitive performance are frequently reported in school-aged preterm children. A few studies have also reported associations between intelligence and motor skill outcomes in this population as assessed by standardized test batteries. At present, however, there is no knowledge of how measures of intelligence relate to more refined measurements of movement quality in preterm children.Design/Method: In the present study, performance on the Wechsler Intelligence Scale for Children, 4th edition (WISC-IV) was related to optoelectronic registrations (ProReflex, Qualisys Inc.) of arm movement performance during a unimanual precision task in a sample of preterm children at 6 to 8 years (n=31) compared with typically developing full-term children (n=36).Results: A significant group effect was revealed for Fullscale IQ, indicating poorer overall performance on the WISC-IV by preterm (mean 95.1) than full-term (mean 103.5) participants. The same pattern was apparent for both the Verbal and Performance indexes and the majority of the sub-tests. Correlation analyses were performed to test the associations between cognitive performance and spatiotemporal movement parameters. Several findings emerged from this procedure and will be presented, including significant relations between Full-scale IQ and movement segmentation at both the proximal and distal level in preterm but not full-term participants.Conclusions: Measures of WISC-IV appear significantly associated with kinematic outcome measures in schoolaged preterm children in terms of better cognitive performance being linked with better movement organization. The same associations were not seen in the age- and sexmatched full-term group. This type of investigation adds to the understanding of relations between cognitive and motor performance in the context of movement organization, coordination, and control depending on birth history.
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| 14. |
- Domellöf, Erik, 1970-, et al.
(författare)
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Upper and lower body functional asymmetries in the newborn : do they have the same lateral biases?
- 2005
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Ingår i: Developmental Psychobiology. - New York : Wiley. - 0012-1630 .- 1098-2302. ; 46:2, s. 133-140
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Tidskriftsartikel (refereegranskat)abstract
- It is still an open question as to whether functional asymmetries in the human newborn derive from a single lateralized system or multiple subsystems based on different neural mechanisms. In the present study, asymmetries in head turning were compared to those in leg movements during stepping and placing, with the latter also being related to differences in leg mass. The effects of an active versus an inactive state or condition were examined for all three behaviors. No overall lateral biases were found for head turning or for the first foot to move in stepping and placing, and there were no concordances among them; however, there was an asymmetry in that the left foot had a shorter onset latency when compared to the right foot for both stepping and placing. Findings are discussed in terms of what they imply about underlying neural systems that have a bearing on expressions of newborn laterality, and also with regard to the impact of methodological differences in this area of study.
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| 15. |
- Ferronato, Priscilla A. M., et al.
(författare)
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Early influence of auditory stimuli on upper-limb movements in young human infants : an overview
- 2014
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Ingår i: Frontiers in Psychology. - : Progressive Frontiers Press. - 1664-1078. ; 5:1043
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Forskningsöversikt (refereegranskat)abstract
- Given that the auditory system is rather well developed at the end of the third trimester of pregnancy, it is likely that couplings between acoustics and motor activity can be integrated as early as at the beginning of postnatal life. The aim of the present mini-review was to summarize and discuss studies on earlyauditory-motor integration, focusing particularly on upper-limb movements (one of the most crucial means to interact with the environment) in association with auditory stimuli, to develop further understanding of their significance with regard to early infant development. Many studies have investigated the relationship between various infant behaviors (e.g., sucking, visual fixation,head turning) and auditory stimuli, and established that human infants can beobserved displaying couplings between action and environmental sensory stimulation already from just after birth, clearly indicating a propensity forintentional behavior. Surprisingly few studies, however, have investigated the associations between upper-limb movements and different auditory stimuli in newborns and young infants, infants born at risk for developmental disorders/delays in particular. Findings from studies of early auditory-motor interaction support that the developing integration of sensory and motor systems is a fundamental part of the process guiding the development of goal-directed action in infancy, of great importance for continued motor, perceptual, and cognitive development. At-risk infants (e.g., those bornpreterm) may display increasing central auditory processing disorders,negatively affecting early sensory-motor integration, and resulting inlong-term consequences on gesturing, language development, and social communication. Consequently, there is a need for more studies on such implications.
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| 16. |
- Johansson, Anna-Maria, 1981-, et al.
(författare)
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Associations between motor skills, cognitive function and birth immaturitly in school-aged children born preterm
- 2013
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Konferensbidrag (refereegranskat)abstract
- OBJECTIVES: Within the framework of an ongoing longitudinal study, relations between motor skills and cognitive function in 7-8-year-old preterm born children were investigated.BACKGROUND: Motor and cognitive problems have been suggested to be the two major sequalea of a preterm birth. Global and selective deficit of neuromotor and executive functions have been found within this group of children at school age. However, few studies haveinvestigated the associations between motor skills andcognitive function in relation toweeks of gestation (GW) and birth weight (BW).DESIGN/METHOD: Children (n = 18) born between 25-34 GW performed the Movement-ABC 2 (M-ABC 2) and Wechsler Intelligence Scale for Children-IV (WISC-IV). Scaled scores from M-ABC 2 (hand function, ball handling skills, static- and dynamic balance, total score) were correlated with indexes derived from the WISC-IV (verbal comprehension, perceptual reasoning, working memory, processing speed, full scale intelligence quotient [FSIQ]), GW and BW.RESULTS: The majority of children had mild to moderate general motor impairments (n = 10) where hand function was most affected (n = 15). FSIQ was somewhat below the norm (M = 95) where working memory (WM) was most impaired (M = 87). Further, associations between motor skills (apart from balance) and processing speed was shown, FSIQ was related to GW, and BW to WM, perceptual reasoning and FSIQ. Most of the associations remained even when excluding two children with a diagnosis of hemiplegic cerebral palsy.CONCLUSIONS: No direct relationships between GW/BW and motor skills were shown. However, the associations found suggest that cognitive function may be a mediating factor between birth status and motor skills. Other analytical methods requiring larger study samples are needed to verify such causality.
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| 17. |
- Johansson, Anna-Maria, et al.
(författare)
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Long-term influences of a preterm birth on movement organization and side specialization in children at 4–8 years of age
- 2014
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Ingår i: Developmental Psychobiology. - : Wiley Periodicals, Inc.. - 0012-1630 .- 1098-2302. ; 56:6, s. 1263-1277
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Tidskriftsartikel (refereegranskat)abstract
- This study explored upper-limb and head kinematics during unimanual goal-directed movements in children born preterm (PT) and full-term (FT) aged 4–8 years. Further, functional lateralization was investigated through side-specific kinematics and hand preference observations. Altogether, 141 children were included, divided into three sub-groups based on gestation week at birth (GW). Children born FT (38–41 GW) and moderately PT (33–35 GW) showed faster, smoother, and shorter movement trajectories than children born very PT (V-PT<33 GW). Only children born FT expressed evident side differences that were characterized by smoother movements with the preferred side. Regarding hand preference, the children born V-PT showed increased rates of non-right-handedness compared with the other groups. Regardless of hand preference, the children born V-PT showed less well organized movements compared with the other groups. These findings suggest that spatio-temporal movement organization and side specialization at pre-/early school-age are affected by a PT birth, and more frequently so for children born before 33 GWs, indicating long-lasting influences on neuromotor development and specialization.
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| 18. |
- Johansson, Anna-Maria, 1981-, et al.
(författare)
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Short- and long-term effects of timing training in young people with cerebral palsy : a kinematic approach
- 2010
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Ingår i: Developmental Medicine and Child Neurology, 52 (Suppl. 4) Brussles, Belgium May 27-29, 2010. - : Wiley Online library. ; , s. 23-24
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Konferensbidrag (refereegranskat)abstract
- Interactive Metronomea (IM) is a multi-modal integration training method based on rhythmic activation of movements in synchronization with a tone where error feedback is provided via auditory and visual cues. However, there is a need for detailed evaluations of this method to verify functional improvements inCP.Here we explored individual effects of IM in five young individuals with cerebral palsy (CP) of different severity. IM training consisted of a 4-week (12 sessions) individually customised program including bilateral and unilateral movements of upper- and lower-extremities. To establish short- and long-term effects, goal-directed upper-limb movements were examined by using a six optoelectronic camera system (240Hz, ProReflex, Qualisys Inc.) at three time points, before and at two following occasions (post-test I; post-test II) after IM training. At post-test I, timing ability was improved in the majority of participants. Kinematic analyses revealed shorter total task durations for all but one individual. Reduced segmentation ofmovements and increased velocity, especially on the more distal parts of the upper extremities, were also observed. No effects were evident on cumulative distance, primarily indicating training effects on temporal movement properties. At post-test II, 6 months after post-test I, most of the participantsmaintained their improved timing ability. The observed changes in kinematic properties suggests that timing training is promising for improving motor control in young individuals with CP. Further studies involving larger samples are required to corroborate and extend the present findings, particularly regarding the neural mechanisms involved in mediating motor improvements following IMtraining.
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| 19. |
- Johansson, Anna-Maria, 1981-, et al.
(författare)
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Spatio-temporal aspects of upper-limb goal-directed movements and relations to perinatal factors in preterm 4-year-old children
- 2011
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Ingår i: Abstracts of the Europeans Academy of Childhood Disability. - : Wiley-Blackwell. ; , s. 37-37
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Konferensbidrag (refereegranskat)abstract
- Objectives: This ongoing quasi-longitudinal study is aimed at the investigation of spatio-temporal properties of goaldirected upper limb movements in 4-year-old children born preterm, compared to age- and sex-matched children born at term. Further, relations between movement quality, in terms of coordination and control, and perinatal factors are of interest.Background: Several studies have shown substantial and persistent motor dysfunction in children born preterm, with no known neurological impairment, at school age. Few studies have, however, investigated parameters related to movement control and coordination and their possible perinatal associations with detailed measurement methods in children at 4 years of age.Design/Method: Performances with the left and right armhand during a unimanual continuous sequential precision task were registered by a 6-camera optoelectronic tracking system (240 Hz, ProReflex, Qualisys Inc.). Information with regard to spatial and temporal parameters of the movement trajectories was extracted.Results: Preliminary results from analyses of kinematic data show longer duration and more spatio-temporal segmentations of the movement trajectory in the preterm group compared to their peers. Analyses of associations between kinematic outcome data and perinatal factors will further be investigated.Conclusions: These results indicate that the 4-year-old children born preterm, as compared to term born controls, have affected neuromotor function as indicated by kinematic properties related to coordination and control. Further analyses will reveal whether these findings are associated with specific perinatal factors.
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| 20. |
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| 21. |
- Jonsson, Bert, 1961-, et al.
(författare)
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Prospective head tracking : head movements, accuracy and timing in relation to a circular object motion
- 2009
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Ingår i: Current Psychology Letters. - : Centre PsyCLE. - 1379-6100. ; 25:1, s. 1-15
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Tidskriftsartikel (refereegranskat)abstract
- In this study, kinematic and video recordings were made of the eye- and head tracking of an object revolving in a vertical plane in two groups of infants (6- and 12-month-old) and one group of adults. The study had two purposes. The first concerned infants' abilities to negotiate the target trajectory when being forced to extensively recruit the head. The second addressed the question whether the same underlying neural controller drives both eye- and head motor systems. It was found that head tracking ability is functional already in 6-month-old infants. However, infants of both age groups displayed more extensive head movements and less accuracy compared to adults. This finding is in line with previous research on one-dimensional horizontal head tracking in infants. Infants also showed less developed timing between head movements and vertical object motion, supporting the argument that both eye- and head tracking have a common developmental trajectory.
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| 22. |
- Rönnqvist, Louise, 1957-
(författare)
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A critical examination of the Moro response in newborn infants--symmetry, state relation, underlying mechanisms
- 1995
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Ingår i: Neuropsychologia. - 0028-3932 .- 1873-3514. ; 33:6, s. 713-726
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Tidskriftsartikel (refereegranskat)abstract
- The primary purpose of the present study was to analyze quantitatively the vestibular evoked Moro response, and the symmetry of the movement pattern involved, as the traditional descriptions bring about. Another aim was to determine the segmental movements involved and determine whether the components of the Moro response are dependent on changes in the infant's behavioral state. Another question concerns whether the form of these movements changed over repeated trials on the same day, or from the first to the fifth day after birth. Vestibular evoked Moro responses of 52 neonates, 1–5 days of age, elicited in different behavior states (State 1–5), were examined and quantitatively analyzed. The response was evoked by a predefined, rapid, downward, vertical body motion, without any dorsiflexion of the infant's head. Optoelectronic device (SELSPOT II) were used to monitor the arm/hand movement patterns involved in the response. The three-dimensional movement pattern in space, duration, velocity, latency, and the acceleration of both arms/hands were analyzed in relation to the infant's behavioral state. The response movements were structured into phases of abduction/extension, adduction/flexion and the extension/flexion of the fingers. The vestibular stimulation used was found to be sufficient for eliciting an adequate Moro response. The segmental movement pattern of the Moro response was found to be sensitive to the infant's behavioral state at the time when the response was elicited. This was found in the movement pattern, duration, latency, and the velocity of the response. The response was found to be asymmetrical, in 82% of the infants it was found to be a predominant shorter onset latency of the right arm, in 12% the opposite was found. These findings suggest that there is a fundamental, spinal asymmetry involved in the Moro response which is subject to supraspinal influences emanating from the vestibulospinal system. No differences were found between 1 and 5 days of age for any of the scoring categories, and no differences were found within groups over six successive trials.
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| 23. |
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| 24. |
- Rönnqvist, Louise, 1957-, et al.
(författare)
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Barnets rörelseutveckling
- 2013. - 2:1
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Ingår i: Fysioterapi för barn och ungdomar. - Lund : Studentlitteratur. - 9789144070681 ; , s. 21-42
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Bokkapitel (refereegranskat)
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| 25. |
- Rönnqvist, Louise, 1957-, et al.
(författare)
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Cognitive performance and behavioral functions in relation to gestational age (GA) at birth
- 2015
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Ingår i: Developmental Medicine & Child Neurology. - : John Wiley & Sons. - 0012-1622 .- 1469-8749. ; 57:Suppl s4, s. 21-
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Tidskriftsartikel (refereegranskat)abstract
- Introduction:It is well established that a very preterm birth (PT) relates to increased behavioral problems. The aim of this study was to investigate effects and associations between different gestational ages (GA) at birth (term, late-to-extreme) and later functions. This study is part of an ongoing, longitudinal project.Participants and Methods:Test outcomes from WISC-IV and Achenbach’s Child-Behavior-Checklist (CBCL) in children tested at 7-8-years (M=7.7) were used to investigate group differences as effect of GA at birth. In total, 64 preterm born (PT), GA range 22-36, (divided into groups of 14 extremely-PT/EPT, 17 very-PT/VPT, and 33 moderately PT/MPT) and 64 term born (TB), were included. Additionally, associations between GA, birth weight (BW), and outcomes from WISC-IV and CBCL were investigated.Results:Multivariate analyses of variance (MANOVA) revealed significantly (p < .05) poorer WISC outcomes on Verbal Comprehension Index, Perceptual Reasoning Index, and on Full-Scale-IQ for children born EPT/VPT in comparison to MPT and TB born. Parents’ CBCL ratings reveled that EPT children had significantly higher prevalence of Attention problems, Thought problems, Aggressive and Somatic complaints. Including the PT-group only shown significant positive correlations between GA/BW respectively and full scale IQ. Higher GA/BW was related to increasing IQ scores. Significant negative correlations were seen between GA/BW respectively and TotProblem/CBCL-scale. Additionally, CBCL/DSM-Oriented Scales; Adhd-, Opposite-, and Conduct-Problems correlated significantly negative with GA/BW in the PT-born children.Conclusion:Our study provides further support for associations between increased risk of cognitive and behavior problems with decreasing GA/BW at birth.
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| 27. |
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| 28. |
- Rönnqvist, Louise, 1957-, et al.
(författare)
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Head position preference in the human newborn : a new look
- 1998
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Ingår i: Child Development. - : Blackwell Publishing. - 0009-3920 .- 1467-8624. ; 69:1, s. 13-23
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Tidskriftsartikel (refereegranskat)abstract
- Head position preference was studied in 20 awake newborns who differed in terms of delivery and sex. They were placed supine on a custom-built platform to reduce the effects of gravity and asymmetries in trunk posture and skull shape. A global and a specific scoring method were used, the infants being in State 3 (quiet wakefulness) or 4 (active wakefulness, excluding crying). Delivery and sex did not account for differences in head position. The head turned more often to the right and was maintained longer in this position during State 3, regardless of scoring method. The maintenance of the head in midline was comparable in duration to that reported for infants at 2–3 months when using the global scoring method. This suggests that the neural mechanisms responsible for attaining and maintaining a midline position are present at birth, but are not functionally expressed due to a lack of adequate power in the antigravity muscles of the neck.
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| 29. |
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| 30. |
- Rönnqvist, Louise, 1957-, et al.
(författare)
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Kinematic analysis of sequential goal-directed movements in at-risk, preterm born children
- 2013
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Ingår i: 22nd Annual Meeting of European Society for Movement Analysis in Adult and Children (ESMAC). - Glasgow, Scotland. ; , s. 53-
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Konferensbidrag (refereegranskat)abstract
- INTRODUCTION and AIM: The aim of this study was to conduct kinematic analyses of sequential upper-limb movements in order to isolate different kinematic parameters that might explain the sensory-motor-functional deficits and delays commonly observed in children born preterm (PT). Quantitative analyses of reaching movements in PT infants [1] have revealed some promising results in characterizing the influence of a premature birth on movement control. Also, recent findings from studies using kinematic measurements on children with mild and moderate hemiplegic cerebral palsy [2, 3] show that kinematic measurements are valuable for making distinctions between even minor movement coordination problems and for identification of sensory-motor impairments. Nevertheless, there is still limited knowledge of how a preterm birth may effect long-term neuromotor development and few have investigated such effects by means of kinematics. PATIENTS/MATERIALS and METHODS: This kinematic study is part of a more comprehensive, longitudinal project with the goal of exploring the relationship between brain development/deviation and sensory-motor performance in children born PT. Participants consist of 148 children aged between 4–8 years; sixty-eight PT (<35 weeks’ gestation age (GA), range, 22-35, M = 31.7, SD = 3.4; 30 girls) with no diagnosed impairments, and eighty age matched children born full-term (FT) without medical problems (M age at testing = 6.7, SD = 1.8; 36 girls). The children performed goal-directed unimanual upper-limb task with respective hand, where small beads were picked by use of pincer-grip and threaded onto a rod sequentially. The children were informed to pick and thread as many beads as possible, one bead at the time, during a pre-set recording time of 30 seconds. The upper-limb movements were recorded by a six camera optoelectronic system (ProReflex, Qualisys Inc., Gothenburg, Sweden). The 3D data (extracted from head-, shoulder-, elbow- and wrist-markers) were further analysed by use of customized MATLAB scripts. To analyse possible effect of GA the PT children were divided into two sub-groups: moderately preterm (M-PT) = GA 33-35, n = 35 and very preterm (V-PT) = GA <32+6, n = 30. RESULTS: The kinematic outcomes analysed by MANOVAs, with side (preferred/ non-preferred) and group (FT, M-PT and V-PT) as categorical predictors, indicating significant group differences in most of the kinematic parameters investigated (e.g., movement duration, 3D distance and segmentation). Differences were mainly evident in the group classified as V-PT compared with M-PT and FT children. Significant correlations between children’s testing age and their kinematic outcomes were also shown within all groups (FT, M-PT and V-PT). These relations were characterized by decreased movement duration, 3D distance and movement segmentation with age. DISCUSSION and CONCLUSIONS: Investigating kinematic outcome parameters of upper-limb goal-directed movements confirms that a PT birth, especially a very PT birth, seems to have a long-term effect on children’s motor functions. In the present study, this was shown by means of less proficient spatiotemporal organization during sequentially performed goal-directed movements in the children born PT in comparison to the FT children. In conclusion, the kinematic movement registrations/analysis offers a reliable, non-invasive method to detect even subtle neuromotor developmental delay and/or abnormality. Thus, the method provides a unique possibility to investigate a number of crucial issues in relation to cerebral abnormalities and sensory-motor development in at-risk children.REFERENCES[1] Fallang, B., Saugstad, O. D., Grogaard, J., & Hadders-Algra, M. (2003). Kinematic quality of reaching movements in preterm infants. Pediatric Research, 53, 836-842.[2] Domellöf, E., Rösblad, B., & Rönnqvist, L. (2009). Impairment severity selectively affects the control of proximal and distal components of reaching movements in children with hemiplegic cerebral palsy. Developmental Medicine & Child Neurology, 51, 807-816.[3] Rönnqvist, L., & Rösblad, B. (2007). Kinematic analysis on unimanual reaching and grasping movements in children with hemiplegic cerebral palsy. Clinical Biomechanics, 22, 165-175.
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| 32. |
- Rönnqvist, Louise, 1957-, et al.
(författare)
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Lateral biases in head turning and the Moro response in the human newborn : are they both vestibular in origin?
- 1998
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Ingår i: Developmental Psychobiology. - 0012-1630 .- 1098-2302. ; 33:4, s. 339-349
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Tidskriftsartikel (refereegranskat)abstract
- Head turning after release from the midline and the Moro response to a full-body drop in 15 full-term newborns lying supine on a custom-built platform was studied. While the lateral bias for head turning was not as pronounced as for the Moro response, it was still assumed in the ratio of 2 (right):1 (left) as predicted by Previc (1991). Onset latency and time-to-peak acceleration were both significantly shorter in the right arm during the initial phase of the Moro response. For both measures, this right arm bias persisted over four consecutive elicitations in most infants. Vaginally delivered infants and those born by Caesarean section did not differ in terms of head preference and the two measures of arm advantage. Our main finding was that infants with a right-sided head preference had a consistently shorter onset latency for the right arm. We interpret this association as stemming from a common labyrinthine asymmetry that involves different vestibulospinal pathways for the neck and arm muscles. In general, our findings are discussed in the context of Previc's (1991) left-otolithic dominance hypothesis and Grattan, De Vos, Levy, and McClintock's (1992) model of newborn functional asymmetries.
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| 33. |
- Rönnqvist, Louise, 1957-, et al.
(författare)
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Neuromotor and cognitive functions in 4-9-years-old children born prematurely
- 2011
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Ingår i: Developmental Medicine & Child Neurology. - 0012-1622 .- 1469-8749. ; 53:Suppl. s3, s. 33-34
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Tidskriftsartikel (refereegranskat)abstract
- OBJECTIVE: To identifying developmental differences in neurologically based functioning in preterm born children compared with typically developing, fullterm born children. BACKGROUND: Resent follow-up studies of children born prematurely, even in those without identified neuropathology, have consistently found poorer neuromotor and cognitive skills at school age; thus, at least from group level comparisons. Still, our knowledge is limited in how a preterm birth may effects later behavioural outcomes. DESIGN/METHODS: In the first phase of this ongoing, cross-sectional and quasi-longitudinal study, motor functions, laterality and cognitive functions have been investigated in 4-9-years-old children born prematurely (N= 70, Mean GW=31), and in comparison to age matched fullterm born children (N=78). Additionally, brain imaging (MRI) data was collected on both fullterm and preterm born children at the age of 7-9-years. Kinematic movement registrations and additional behaviour measurements in combination with high resolution, structural 3Tesla MRI scans was used to investigate a number of expected crucial issues and associations between neuromotor, cognitive and structural organisations in both the preterm and the full term born children. RESULTS: Preliminary outcomes indicating subtitle, but still overall differences in most of the kinematic parameters analysed from arm, hand, and head movements (e.g., movement durations, smoothes, segmentation, velocity profile), and with less lateralized sensory-motor performance in the preterm born children at the age of 4- and 7-9-years in comparison to fullterm born children. In addition, the kinematic outcomes were associated with the cognitive performance in the preterm born children. These results are suggesting that both neuromotor and cognitive functions are less efficient in preterm born children. These behavioural outcomes will further be investigated in relation to the outcomes from the MRI investigations. CONCLUSIONS: The outcome from the first analysis underscores the need for further refine investigations and follow-ups, even on an individual level, for the majority of preterm born children.
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| 34. |
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| 35. |
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| 36. |
- Rönnqvist, Louise, 1957-
(författare)
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Är det sant att konsnärer ofta är vänsterhänta?
- 2014
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Ingår i: Forskning & Framsteg. - Stockholm : Tidskriften Forskning & Framsteg. - 0015-7937. ; 8, s. 61-
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Tidskriftsartikel (populärvet., debatt m.m.)
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| 37. |
- Rönnqvist, Louise, 1957-
(författare)
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Är vänsterhänta speciella? : [Frågesvar]
- 2014
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Ingår i: Modern Psykologi. - Stockholm : Modern Psykologi i Sverige AB. - 2000-4087. ; :10, s. 80-81
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Tidskriftsartikel (populärvet., debatt m.m.)
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| 38. |
- Sandlund, Marlene, 1972-, et al.
(författare)
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Effect of practice with motion interactive video games on goal-directed arm movements in children with cerebral palsy : a kinematic evaluation
-
Annan publikation (övrigt vetenskapligt/konstnärligt)abstract
- Objective: The aim of the present study was to evaluate the quality of goal-directed arm movements in children with cerebral palsy after four weeks of daily practice with motion interactive games, and to explore and compare the applicability of various kinematic parameters in a virtual context compared to a situation with real objects. Methods: Fifteen children with CP, 6-16 years, practiced with the EyeToyâ for PlayStation2â in their homes during four weeks. Before and after the intervention kinematics and kinetics were captured with a five camera motion analysis system (Proreflex, Qualisys AB, Gothenburg, Sweden) and a force plate. The children performed arm movements towards both virtual and real targets. Results: The children used a more economic reaching strategy with shorter Centre of pressure paths, improved Movement precision, and reduced variability in Maximal shoulder angles during play after practice. Transfer of improved motor control to goal-directed arm movements towards real targets was also indicated by increased Movement smoothness, and while reaching with the non-dominant side, reduced Centre of pressure paths path. The spatiotemporal characteristics proved complex to interpret in terms of improved motor control. Conclusions: When taking the constraints of the tasks into account the relevant kinematic parameters explored support the conclusion that practice with motion interactive games resulted in an improved motor control. The results of this study illuminate the importance of considering both the nature of the task and the context in which movements are performed when selecting and interpreting kinematic parameters.
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| 39. |
- Sandlund, Marlene, et al.
(författare)
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Training of goal directed arm movements with motion interactive video games in children with cerebral palsy : a kinematic evaluation
- 2014
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Ingår i: Developmental Neurorehabilitation. - : Informa Healthcare. - 1751-8423 .- 1751-8431. ; 17:5, s. 318-326
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Tidskriftsartikel (refereegranskat)abstract
- Objective: The main aim of this study was to evaluate the quality of goal-directed arm movements in 15 children with cerebral palsy (CP) following four weeks of home-based training with motion interactive video games. A further aim was to investigate the applicability and characteristics of kinematic parameters in a virtual context in comparison to a physical context.Method: Kinematics and kinetics were captured while the children performed arm movements directed towards both virtual and physical targets.Results: The children’s movement precision improved, their centre of pressure paths decreased, as did the variability in maximal shoulder angles when reaching for virtual objects. Transfer to a situation with physical targets was mainly indicated by increased movement smoothness.Conclusion: Training with motion interactive games seems to improve arm motor control in children with CP. The results highlight the importance of considering both the context and the task itself when investigating kinematic parameters.
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| 40. |
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| 41. |
- Sommer, Marius, 1974-, et al.
(författare)
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Improved motor-timing : effects of synchronized metronome training on golfshot accuracy
- 2009
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Ingår i: Journal of Sports Sciences & Medicine. Free electronic journal. - Ankara / Turkey : Asist Group. - 1303-2968. ; 8:4, s. 648-656
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Tidskriftsartikel (refereegranskat)abstract
- This study investigates the effect of synchronized metronome training (SMT) on motor timing and how this training might affect golf shot accuracy. Twenty-six experienced male golfers participated (mean age 27 years; mean golf handicap 12.6) in this study. Pre- and post-test investigations of golf shots made by three different clubs were conducted by use of a golf simulator. The golfers were randomized into two groups: a SMT group and a Control group. After the pre-test, the golfers in the SMT group completed a 4-week SMT program designed to improve their motor timing, the golfers in the Control group were merely training their golf-swings during the same time period. No differences between the two groups were found from the pre-test outcomes, either for motor timing scores or for golf shot accuracy.However, the post-test results after the 4-weeks SMT showed evident motor timing improvements. Additionally, significant improvements for golf shot accuracy were found for the SMT group and with less variability in their performance. No such improvements were found for the golfers in the Control group. As with previous studies that used a SMT program, this study’s results provide further evidence that motor timing can be improved by SMT and that such timing improvement also improves golf accuracy.
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| 42. |
- Sommer, Marius, 1974-, et al.
(författare)
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Synchronized metronome training induces changes in the kinematic properties of the golf swing
- 2014
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Ingår i: Sports Biomechanics. - : Taylor & Francis Group. - 1476-3141 .- 1752-6116. ; 13:1, s. 1-16
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Tidskriftsartikel (refereegranskat)abstract
- The purpose of this study was to evaluate possible effects of synchronized metronome training (SMT) on movement dynamics during golf swing performance, as captured by kinematic analysis. A one-group, between-test design was applied on thirteen male golfers (27.5 ± 4.6 years old, 12.7 ± 4.9 golf handicap) who completed twelve sessions of SMT over a four week period. Pre- and post-assessments of golf swings made with three different clubs (4-iron, 7-ironand pitching wedge) were performed using a three-dimensional motion capture system. Club peak velocity at three different swing phases andcross-correlation analysis of time-series signals were made on joint couplings(wrist-elbow-shoulder) of both arms, and between joints and the club, during the full golf swing. There were significantly higher cross-correlations between joint-couplings and concomitant changes of the associated phase-shift differences, as well as reduced phase-shift variability at post-test. No significant effect of SMT was found for the club peak velocities. We suggest that domain-general influences of SMT on the underlying brain-based motorcontrol strategies lead to a more coordinated movement pattern of the golf swing performance, which may explain previous observations of significantly improved golf shot accuracy and decreased variability after SMT.
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