早期脑卒中患者躯干屈伸肌群表面肌电研究

目的：研究早期偏瘫患者竖脊肌、腹直肌在屈伸动作中肌电生理变化规律及临床意义。方法：发病2个月内的重度坐位及步行能力低下患者组10例，轻度坐位及步行能力低下患者组8例，正常人组7例，采用DNI-200P型肌电仪，Ag-Agcl表面电极。收集双侧胸竖脊肌、腰竖脊肌、腹直肌在放松坐位、前倾坐位、后伸坐位的肌电信号。结果：前倾／静息时正常人竖脊肌活动曲线有明显的峰值，而重度坐位及步行能力低下组无论是健侧或患侧，曲线较缓和，峰值不明显。后倾／静息时正常人组腹直肌曲线的波峰出现，而重度坐位及步行能力低下组曲线平坦，峰值出现不明显。轻度坐位及步行能力低下组竖脊肌与腹直肌与正常人组差异无显著性意义（P〉0．05）。结论：早期重度坐位及步行能力低下组双侧竖脊肌前倾功能减退，双侧腹直肌后伸功能减退．轻度坐位及步行能力低下组与正常人组差异无显著性意义。

The surface electromyography study of muscles of trunk flexors and extensors in early stroke patients

Objective:To study the electrophysiological presentation of lumber,thoracic erector spinae and rectus abdominis in trunk flexion-extension,and to clarity the clinical sense.Method:10 hemiplegia and 8 hemiparesis and 7 normal persons were involved. The DNI-200P EMG machine and Ag-Agcl electrodes were used. The signals of lumber erector spinae,thoracic erector spinae?rectus abdominis in relaxing sitting position,forward sitting position?backward sitting position were collected. Result: The curve of erector spinae of normal persons had apparent peak which occured at forward/rest, while the curve of hemiplegia had no apparent peak in either paretic side and non-paretic side.The curves of rectus abdominis of normal persons had apparent peak which occured at backward/rest, while the rectus abnominis of hemiplegia had not. There was no apparent difference between hemiparasis and normal people.Conclusion: Hemiplegia has less activity of erecor spinae and rectus abdominis,while hemiparesis has no apparent difference compared with nomal persons. There is no apparent imbalance in left and right sides of three groups.