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Predictive and Reactive Control of Precision Grip in Children With Congenital Hemiplegia

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Bleyenheuft, Yannick [UCL] Thonnard, Jean-Louis [UCL]

Background and Objectives . Grasping an object between the thumb and index finger requires precise coordination between grip force (GF) and tangential load force (LF), which is impaired in children with congenital hemiplegia (CH). This study aimed to determine the respective contributions of predictive and reactive control in the impaired precision grip of 12 children with CH between 10 and 16 years of age when compared with age- and gender-matched controls. Methods. The load of a handheld object was increased rapidly by generating an impact through the drop of a mass attached to the object. The drop was triggered by the participant (predictive conditions) or unexpectedly by the examiner (reactive conditions). In both conditions, participants aimed to prevent the object from falling. Both hands of children with CH and controls were tested. Results. During our task, no differences in the GF levels were observed between paretic, nonparetic, and control hands. Under predictive conditions, the temporal variables related to the GF were preserved before impact in children with CH but altered after impact. Under reactive conditions, the reactive delays were longer in the paretic hand. Predictive and reactive control were preserved on the nonparetic hand. Conclusions. Deficits were observed in both predictive and reactive control for the paretic hand. The predictive control exists but is altered after the impact, suggesting an inability to anticipate the consequences of a dynamic perturbation. The authors suggest that the abilities of the nonparetic side could be used in neurorehabilitation to improve motor control of the paretic side.

Document type Article de périodique (Journal article) – Article de recherche – Journal Article, Research Support, Non-U.S. Gov't
Access type Accès libre
Publication date 2010
Language Anglais
Journal information "Neurorehabilitation and Neural Repair" - Vol. 24, no. 4, p. 318-327 (2010)
Peer reviewed yes
Publisher Sage Publications Inc (Thousand Oaks)
issn 1545-9683
e-issn 1552-6844
Publication status Publié
Affiliations UCL - SSS/IONS/COSY - Systems & cognitive Neuroscience
UCL - SSS/IONS - Institute of NeuroScience
UCL - (SLuc) Service de médecine physique et de réadaptation motrice
MESH Subject Time Factors ; Thumb - physiopathology ; Task Performance and Analysis ; Pyramidal Tracts - pathology ; Psychomotor Performance ; Motor Skills ; Male ; Humans ; Hemiplegia - etiology - pathology - physiopathology ; Friction ; Fingers - physiopathology ; Female ; Diffusion Tensor Imaging ; Child
Keywords cerebral palsy ; precision grip ; predictive control ; reactive control ; hemiparesis
Links
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Bibliographic reference Bleyenheuft, Yannick ; Thonnard, Jean-Louis. Predictive and Reactive Control of Precision Grip in Children With Congenital Hemiplegia. In: Neurorehabilitation and Neural Repair, Vol. 24, no. 4, p. 318-327 (2010)
Permanent URL http://hdl.handle.net/2078.1/33944