Sensory Motor Performance Program, Rehabilitation Institute of Chicago, Chicago, IL 60611, USA.
IEEE Trans Biomed Eng. 2013 Mar;60(3):845-52. doi: 10.1109/TBME.2012.2205249. Epub 2012 Jun 19.
We introduce a new method to examine the spinal motoneuron involvement after stroke using a surface electromyography (EMG) recording system. Fourteen chronic stroke survivors with mild to severe muscle weakness participated in the study. Surface EMG signals were collected from the first dorsal interosseous muscle while subjects performed isometric index finger abduction with paretic or contralateral hand at different matched force levels. Compared with the contralateral muscles, different patterns of peak amplitude distribution were observed at the paretic muscles, which could be induced by motor unit pathological alterations following a stroke. Compared with the conventional electrophysiological methods, the peak amplitude distribution analysis proposed in this study provides a convenient approach to help identify specific mechanisms of muscle weakness and other symptoms after stroke.
我们介绍了一种新的方法，使用表面肌电图（EMG）记录系统来检查中风后的脊髓运动神经元受累。14 名慢性中风幸存者参与了这项研究，他们的肌肉无力程度从轻度到重度不等。当受试者用患侧或对侧手在不同匹配的力水平下进行等长食指外展时，从第一背侧骨间肌中采集表面 EMG 信号。与对侧肌肉相比，在患侧肌肉中观察到不同的峰值幅度分布模式，这可能是中风后运动单位病理性改变引起的。与传统的电生理方法相比，本研究中提出的峰值幅度分布分析提供了一种方便的方法来帮助识别中风后肌肉无力和其他症状的特定机制。
