Lower extremity muscle coordination in stroke patients revealed by surface electromyography
10.3760/cma.j.issn.0254-1424.2009.07.006
- VernacularTitle:脑卒中患者小腿肌肉运动协调性的表面肌电特征研究
- Author:
Zulin DOU
;
Hongmei WEN
;
Li JIANG
;
Lei ZHU
- Publication Type:Journal Article
- Keywords:
Stroke;
Surface electromyography;
Ankle joint movement;
Muscle coordination
- From:
Chinese Journal of Physical Medicine and Rehabilitation
2009;31(7):448-451
- CountryChina
- Language:Chinese
-
Abstract:
Objective To explore the changes in muscle activity patterns in the lower leg during ankle dorsiflexion and plantarflexion in stroke patients. Methods Ten recovering stroke patients with hemiparesis(Pa- tient group)and ten age-and sex-matched healthy volunteers(Healthy control group)were studied.The subjects performed ankle dorsiflexion and plantarflexion synchronized with a visual cue while supine.Surface electrodes were applied over the anterior tibialis(TA),caput laterale musculi gastrocnemius(IGM),caput mediale musculi gas-troenemius(mGM)and soleus muscles(SOL)for integrated electromyography(iEMG).Results During ankle dorsiflexion,the TA,lGM,mGM and SOL of the affected side showed a significantly lower iEMG signal than the unaffected side.Activity of the lGM,mGM and SOL of the affected side were significantly lower than in the healthy controls.During ankle plantaflexion,the TA,lGM and mGM on the affected side had significantly lower activity than those of the healthy controls.The mGM of the affected side showed significantly lower muscle activity than the unaffeeted side.The SOL contraction ratio on the affected side was significantly higher than on the unaffected side and in the healthy control group. Conclusion Except for the soleus,there is an obvious decline in muscle activi-ty in the affected lower extremities of stoke patients during ankle dorsiflexion and plantaflexion.The soleus on the affected side becomes the primary plantarflexor in patients with stroke,rather than the caput laterale musculi gas-trocnemius or caput mediale musculi gastroenemius as in healthy subjects.
