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- Grönlund, Christer, et al.
(författare)
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Spatio-temporal processing of surface EMG signals from the sternocleidomastoideus muscle to assess effects of radiotherapy on motor unit conduction velocity and firing rate : a pilot study
- 2008
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Ingår i: Biomedical Signal Processing and Control. - : Elsevier. - 1746-8094. ; 3:2, s. 163-168
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Tidskriftsartikel (refereegranskat)abstract
- Radiation therapy causes both muscle and nerve tissue damage. However, the evolution and mechanisms of these damages are not fully understood. Information on the state of active muscle fibres and motoneurons can be obtained by measuring sEMG signals and calculating the conduction velocity (CV) and firing rate of individual motor units, respectively. The aim of this pilot study was to evaluate if the multi-channel surface EMG (sEMG) technique could be applied to the sternocleidomastoideus muscle (SCM) of radiotherapy patients, and to assess if the CV and firing rate are altered as a consequence of the radiation. Surface EMG signals were recorded from the radiated and healthy SCM muscles of 10 subjects, while subjects performed isometric rotation of the head. CV and firing rate were calculated using two recently proposed methods based on spatio-temporal processing of the sEMG signals. The multi-channel sEMG technique was successfully applied to the SCM muscle and CV and firing rates were obtained. The measurements were fast and simple and comfortable for the patients. Sufficient data quality was obtained from both sides of seven and four subjects for the CV and firing rate analysis, respectively. No differences in CV or firing rate were found between the radiated and non-radiated sides (p = 0.13 and p = 0.20, respectively). Firing rate and CV were also obtained from a myokymic discharge pattern. It was found that the CV decreased significantly (p = 0.01) during the bursts.
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- Hesslow, Thomas, et al.
(författare)
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Internet-delivered psychodynamic psychotherapy in the treatment of social anxiety disorder
- 2015
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Ingår i: Abstracts from the 7th Swedish Congress on internet interventions (SWEsrii). - Linköping : Linköping University Press. ; , s. 12-12
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Konferensbidrag (övrigt vetenskapligt/konstnärligt)abstract
- Social anxiety disorder is one of the most common mental health disorders. Effective treatments exist, but limited access and high costs causes many sufferers to remain untreated. As not all patients accept the CBTmodel of psychopathology, alternative treatments are desirable. We conducted two studies to help establish the efficacy of a psychodynamic model of guided self-help (IPDT). In the first study (N=72) participants were randomized to either ten weeks of IPDT or a waiting list control condition. Mixed-effects models revealed a significant difference at post-treatment in favor of the treatment condition on the primary outcome measure, LSAS-SR, with a large effect size. Rates of remission were comparable to recent face-to-face trials, and improvements were maintained at 6- and 12-month follow-ups. The second study was a pilot preference study where the control group in study 1 chose either IPDT (N=23) or ICBT (N=13). Both treatments led to moderate improvements. Notably, both groups suffered an exacerbation of interpersonal symptoms at 6-month follow-up. In summary, the results suggest that IPDT is effective in the treatment of social anxiety, with effect sizes in the same range as ICBT and face-to-face psychotherapy.
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- Järvholm, Kajsa, et al.
(författare)
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Characteristics of adolescents with poor mental health after bariatric surgery
- 2016
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Ingår i: Surgery for Obesity and Related Diseases. - : Elsevier BV. - 1550-7289. ; 12:4, s. 882-890
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Tidskriftsartikel (refereegranskat)abstract
- Background: About 20% of adolescents experience substantial mental health problems after bariatric surgery. Objectives: The aim of this study was to explore differences between adolescents with poor mental health (PMH) 2 years after surgery and those with average/good mental health. Methods: Mental health and health-related quality of life were assessed in 82 of 88 adolescents (mean age: 16.8 yr, 67% female) at baseline and 1 and 2 years after laparoscopic gastric bypass. Possible associations among mental health, weight, and biochemical outcomes were explored. Results: Two years after surgery 16 (20%) adolescents were identified as having PMH. More symptoms of anxiety and depression and worse mental health at baseline significantly predicted PMH 2 years later. The decline in mental health for the PMH group happened mainly during the second year after surgery. Suicidal ideation was reported in 14% of the total sample 2 years postsurgery and was more frequent in the PMH group. Weight outcomes between groups were comparable at all time points, and physical health was equally improved 2 years after surgery. Conclusions: Although adolescents with PMH after surgery lose as much weight and have similar improvements in physical health compared with other adolescents, special attention should be given to adolescents who report mental health problems at baseline and follow-up, especially during the second year after gastric bypass. The high prevalence of suicidal ideation in adolescents 2 years after bariatric surgery is another indication that longer follow-up is necessary. (Surg Obes Relat Dis 2016;12:882-892.)
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- von Hofsten, Jonas, et al.
(författare)
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Determination of the expression pattern of the dual promoter of zebrafish fushi tarazu factor-1a following microinjections into zebrafish one cell stage embryos
- 2005
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Ingår i: General and Comparative Endocrinology. - San Diego : Academic Press. - 0016-6480 .- 1095-6840. ; 142:1-2, s. 222-226
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Tidskriftsartikel (refereegranskat)abstract
- The zebrafish fushi tarazu factor-1a (ff1a) is a transcription factor belonging to the NR5A subgroup of nuclear receptors. The NR5A receptors bind DNA as monomers and are considered to be orphans due to their ability to promote transcription of downstream genes without ligands. In zebrafish, four M homologues (Ff1a, Ff1b, Ff1c, and Ff1d) have been identified so far. The gene coding for Ff1a is driven by two separate promoters, and give rise to four splice variants. Ff1a is expressed in the somites and pronephric ducts during somitogenesis and in the brain, liver, and mandibular arch during later embryonic stages. In adults the gene is highly expressed in gonads, liver, and intestine, but can be detected in most tissues. The broad variety of embryonic expression domains indicates several important developmental features. One of the mammalian fushi tarazu factor-1 genes, steroidogenic factor-1 (SF-1), is essential for the development of gonads and adrenals. SF-1 is together with Sox9, WT1, and GATA4 a positive transcriptional regulator of human anti-mullerian hormone (AMH) and thereby linked to the male sex-determining pathway. The zebrafish ff1a dual promoter contains several GATA binding sites and E-boxes, a site for DR4, XFD2, MyoD, Snail, HNF3, S8, and an HMG-box recognition site for Sox9. In a first attempt to dissect the ff1a promoter in vivo we have produced first generation transgenes in order to determine the correlation between the expression of the endogenous ff1a gene and the microinjected ff1a a promoter coupled to the pEGFP reporter vector. Our results show that the microinjected constructs are expressed in the correct tissues.
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