Spaulding S J, White S C, McPherson J J, Schild R, Transon C, Barsamian P
School of Allied Health Professions, University of Wisconsin-Milwaukee 53211.
Electromyogr Clin Neurophysiol. 1990 Feb-Mar;30(2):109-15.
Electromyographic analysis in both the time domain (root mean square EMG) and the frequency domain (mean power frequency EMG) of the biceps, triceps, wrist extensors and wrist flexors were analysed in six young cerebral palsied adults and six normal individuals. The subjects sat in a Rifton positioning chair. Each subject's right arm was positioned with the shoulder adducted, the elbow at 90 degrees and the hand resting on the arm rest. The subject then reached the right arm forward to grasp a dowel which was placed at shoulder level in front of the subject. There was no significant difference between the time it took the two groups to do the required movement. The RMS analysis indicated the muscle activation was variable among subjects, with evidence of concontraction of the antagonist muscles for the disabled group. The frequency analysis indicated that the disabled group had significantly lower mean power for the biceps and the wrist extensor muscles compared to the normal group. Neurological differences or fibre type abnormalities may account for these differences.
对6名年轻的成年脑瘫患者和6名正常个体的肱二头肌、肱三头肌、腕伸肌和腕屈肌进行了时域（均方根肌电图）和频域（平均功率频率肌电图）的肌电图分析。受试者坐在Rifton定位椅上。每个受试者的右臂处于内收位，肘部呈90度，手放在扶手上。然后受试者将右臂向前伸展以抓住一根放在其前方肩部高度的木钉。两组完成所需动作的时间没有显著差异。均方根分析表明，受试者之间的肌肉激活情况各不相同，残疾组有拮抗肌共同收缩的迹象。频率分析表明，与正常组相比，残疾组肱二头肌和腕伸肌的平均功率显著更低。神经学差异或纤维类型异常可能是造成这些差异的原因。
