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Measurement of synergy and spasticity during functional movement of the post-stoke hemiplegic upper limb

Authors
 Suk Hooh Ohn ; Woo-Kyoung Yoo ; Kwang-Ik Jung ; Nam Jae Lee ; Ikjun Choi ; Bora Jung ; Seungho Ahn ; Deog Young Kim 
Citation
 Journal of Electromyography and Kinesiology, Vol.23(2) : 501~507, 2013 
Journal Title
 Journal of Electromyography and Kinesiology 
ISSN
 1050-6411 
Issue Date
2013
Abstract
The aim of the present study was to measure the muscle-contraction patterns of the hemiplegic upper limb using electromyography (EMG) and to investigate the relationship between muscle co-contraction and functional recovery in stroke patients presenting with synergy and spasticity. The muscle-contraction patterns of the upper limb of 12 chronic stroke patients and 10 normal volunteers were measured, and the co-contraction in the distal and proximal muscles was simultaneously quantified, while the participants performed hand-grasp and shoulder flexion tasks. The spasticity and hemiplegic arm function were evaluated, respectively, on a modified Ashworth scale (MAS) and by means of Fugl-Meyer motor assessment (FMA). The correlation between the MAS and FMA values was analyzed. Increased co-contraction (66-555%) was observed in both the proximal and distal upper limbs, and was positively correlated with spasticity of the elbow flexor (r = 0.944 on shoulder flexion, r = 0.741 on hand grasping, p < 0.01) and negatively correlated with functional recovery of the upper limb (r = -0.670 ∼ -0.884, p < 0.05). Specific movement patterns influenced by synergy and spasticity were confirmed by EMG. These results might prove useful to the formulation of appropriate management plans such as those involving botulinum toxin injection or nerve block
URI
http://ir.ymlib.yonsei.ac.kr/handle/22282913/86530
DOI
10.1016/j.jelekin.2012.10.001
Appears in Collections:
1. 연구논문 > 1. College of Medicine > Dept. of Rehabilitation Medicine
Yonsei Authors
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Link
 http://www.sciencedirect.com/science/article/pii/S105064111200171X?via=ihub
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