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

Sarcher, A, Raison, M, Leboeuf, FY ORCID: https://orcid.org/0000-0002-6483-9150, 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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Abstract

Objective
To address the roles and mechanisms of co-activation in two flexor/extensor pairs during elbow extension in children with cerebral palsy (CP).
Methods
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.
Results
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.
Conclusions
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.
Significance
Co-activation in children with CP is both physiological and pathological.

Item Type: Article
Uncontrolled Keywords: muscle co-activation,surface electromyography,unilateral spastic cerebral palsy
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: 05 Oct 2018 18:21
URI: http://usir.salford.ac.uk/id/eprint/46482

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