Pathological and physiological muscle co-activation during active elbow extension in children with unilateral cerebral palsy

Sarcher, A, Raison, M, Leboeuf, FY ORCID:, Perrouin-Verbe, B, Brochard, S and Gross, R 2016, 'Pathological and physiological muscle co-activation during active elbow extension in children with unilateral cerebral palsy' , Clinical Neurophysiology, 128 (1) , pp. 4-13.

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To address the roles and mechanisms of co-activation in two flexor/extensor pairs during elbow extension in children with cerebral palsy (CP).
13 Typically Developing (TD) and 13 children with unilateral spastic CP performed elbow extension/flexion at different speeds. Elbow angle and velocity were recorded using a 3D motion analysis system. The acceleration and deceleration phases of extension were analyzed. Co-activation of the brachioradialis/triceps and biceps/triceps pairs was computed for each phase from surface electromyographic signals. Statistical analysis involved linear mixed effects models and Spearman rank correlations.
During the acceleration phase, there was strong co-activation in both muscle pairs in the children with CP, which increased with speed. Co-activation was weak in the TD children and it was not speed-dependent. During the deceleration phase, co-activation was strong and increased with speed in both groups; co-activation of brachioradialis/triceps was stronger in children with CP, and was negatively correlated with extension range and positively correlated with flexor spasticity.
Abnormal patterns of co-activation in children with CP were found throughout the entire movement. Co-activation was specific to the movement phase and to each flexor muscle.
Co-activation in children with CP is both physiological and pathological.

Item Type: Article
Schools: Schools > School of Health and Society
Journal or Publication Title: Clinical Neurophysiology
Publisher: Elsevier
ISSN: 1388-2457
Related URLs:
Depositing User: Dr Fabien LEBOEUF
Date Deposited: 05 Oct 2018 12:05
Last Modified: 16 Feb 2022 18:39

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