The relation between mirror movements and non-use of the affected hand in children with unilateral cerebral palsy

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The relation between mirror movements and non-use of the affected hand in children with unilateral cerebral palsy

Zielinski, Ingar M. (author): Behavioural Science Institute, Nijmegen, the Netherlands

Green, Dido (author): Jönköping University,HHJ, Avdelningen för rehabilitering,HHJ. CHILD,Department of Sport and Health Science, Oxford Brookes University, Oxford, United Kingdom

Rudisch, Julian (author): Department of Sport and Health Science, Oxford Brookes University, Oxford, United Kingdom

Jongsma, Marijtje L. A. (author): Behavioural Science Institute, Nijmegen, the Netherlands

Aarts, Pauline B. M. (author): Department of Pediatric Rehabilitation, Sint Maartenskliniek, Nijmegen, the Netherlands

Steenbergen, Bert (author): Behavioural Science Institute, Nijmegen, the Netherlands

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2016-07-16
2017
English.
In: Developmental Medicine & Child Neurology. - : John Wiley & Sons. - 0012-1622 .- 1469-8749. ; 59:2, s. 152-159

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Journal article (peer-reviewed)

Abstract Subject headings

Aim:In children with unilateral cerebral palsy (CP), it is widely believed that mirror movements contribute to non-use of the affected hand despite preserved capacity, a phenomenon referred to as developmental disregard. We aimed to test whether mirror movements are related to developmental disregard, and to clarify the relation between mirror movements and bimanual function.Method:A repetitive squeezing task simultaneously measuring both hands' grip-forces was developed to assess mirror movements by using maximum cross-correlation coefficient (CCCmax) as well as strength measures (MMstrength). Developmental disregard, bimanual performance, and capacity were assessed using a validated video-observation method. Twenty-one children with unilateral CP participated (Median age 10y 7mo, interquartile range [IQR] 10y 1mo–12y 9mo). Outcome measures of mirror movements were correlated to developmental disregard, bimanual performance, and capacity scores using Spearman's correlations (significance level: α<0.05).Results:Mirror movements were not related to developmental disregard. However, enhanced mirror movements in the less-affected hand were related to reduced performance (CCCmax: ρ=−0.526, p=0.007; MMstrength: ρ=−0.750, p<0.001) and capacity (CCCmax: ρ=−0.410, p=0.033; MMstrength: ρ=−0.679, p<0.001). These relations were only moderate (performance:MMstrength: ρ=−0.504, p=0.010), low (capacity: MMstrength: ρ=−0.470, p=0.016) or absent for mirror movements in the affected hand. Additionally, seven children showed stronger movements in their less-affected hands when actually being asked to move their affected hand.Interpretation:These findings show no relation between mirror movements and developmental disregard, but support an association between mirror movements and bimanual function.

Subject headings

MEDICIN OCH HÄLSOVETENSKAP -- Klinisk medicin -- Neurologi (hsv//swe)
MEDICAL AND HEALTH SCIENCES -- Clinical Medicine -- Neurology (hsv//eng)
MEDICIN OCH HÄLSOVETENSKAP -- Klinisk medicin -- Pediatrik (hsv//swe)
MEDICAL AND HEALTH SCIENCES -- Clinical Medicine -- Pediatrics (hsv//eng)

Keyword

Article
cerebral palsy
child
childhood disease
clinical article
female
hand movement
human
male
mirror movement
outcome assessment
physical performance
pinch strength
priority journal
school child
unilateral cerebral palsy
adolescent
complication
hand
hand strength
hemispheric dominance
Movement Disorders
nonparametric test
pathology
pathophysiology
physiology
Psychomotor Disorders
Functional Laterality
Humans
Statistics
Nonparametric

Publication and Content Type

ref (subject category)
art (subject category)

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