Rasool Ghulam, Afsharipour Babak, Suresh Nina L, Rymer William Zev
Annu Int Conf IEEE Eng Med Biol Soc. 2015;2015:6058-61. doi: 10.1109/EMBC.2015.7319773.
We investigated the spatial patterns of electrical activity in stroke-affected muscles using the high density surface electromyogram (sEMG) grids. We acquired 128-channel sEMG signals from the impaired as well as contralateral Biceps Brachii (BB) muscles of stroke survivors and from healthy participants at various force levels from 20 to 60% of maximum voluntary contraction in an isometric non-fatiguing recording protocol. We found the spatial sEMG pattern to be consistent across force levels in healthy and stroke subjects. However, once compared across sides (left vs right in healthy and impaired vs. contralateral in stroke) we found stroke-affected sides to be significantly different in distribution pattern of sEMG from the contralateral side. The sEMG activity areas were significantly shrunk on the affected sides indicating muscle atrophy due to stroke.
我们使用高密度表面肌电图（sEMG）网格研究了中风影响肌肉的电活动空间模式。我们在等长非疲劳记录方案中，从中风幸存者受损的以及对侧肱二头肌（BB）肌肉和健康参与者的肌肉中，在最大自主收缩的20%至60%的不同力量水平下采集了128通道的sEMG信号。我们发现，健康受试者和中风受试者的空间sEMG模式在不同力量水平上是一致的。然而，一旦进行两侧比较（健康受试者的左侧与右侧，中风患者的受损侧与对侧），我们发现中风影响侧的sEMG分布模式与对侧有显著差异。受影响侧的sEMG活动区域明显缩小，表明中风导致了肌肉萎缩。
