Yamada M, Kumagai K, Uchiyama A
Kanagawa Rehabilitation Institute.
Electromyogr Clin Neurophysiol. 1991 May-Jul;31(4):251-6.
Muscle fiber conduction velocity in single motor unit (MU) during voluntary contraction was measured by using the multi-channel surface EMG. The subjects examined were 28 normal controls (5-40 years old), four patients with myopathy and three patients with neuropathy. The tibialis anterior and the biceps brachii muscles were investigated at weak and moderate contraction levels. In normal muscles, the mean muscle fiber conduction velocity increased with muscle force (P less than 0.01). In three of four cases with myopathy, the conduction velocities were reduced compared to normal subjects (P less than 0.01), and there was little or no correlation between the conduction velocity and muscle force in myopathy. The conduction velocities were within the normal range in the muscles of patients with neuropathy. However, high-amplitude MUAPs with fast conduction velocities were detected during weak voluntary contraction in one case with neuropathy.
使用多通道表面肌电图测量了自愿收缩期间单个运动单位（MU）的肌纤维传导速度。研究对象包括28名正常对照者（年龄5至40岁）、4名肌病患者和3名神经病患者。在弱收缩和中等收缩水平下对胫前肌和肱二头肌进行了研究。在正常肌肉中，平均肌纤维传导速度随肌肉力量增加而增加（P<0.01）。在4例肌病患者中的3例中，与正常受试者相比传导速度降低（P<0.01），并且在肌病中传导速度与肌肉力量之间几乎没有相关性。神经病患者肌肉的传导速度在正常范围内。然而，在1例神经病患者的弱自愿收缩期间检测到了具有快速传导速度的高波幅运动单位动作电位（MUAPs）。
