Okajima Y, Toikawa H, Hanayama K, Ohtsuka T, Kimura A, Chino N
Department of Rehabilitation Medicine, Keio University Tsukigase Rehabilitation Center, Yugashima, Shizuoka, Japan.
Neurosci Lett. 1998 Aug 28;253(1):65-7. doi: 10.1016/s0304-3940(98)00590-4.
To test the hypothesis that the nerve fiber conduction velocity of a motor unit is correlated with the muscle fiber conduction velocity of the unit, the collision technique was used to discriminate the motor unit action potentials elicited by stimulation of a group of nerve fibers with known conduction velocity. Muscle fiber conduction velocity was determined from the propagating action potentials of the unit recorded by a surface electrode array. A weak but significantly positive correlation was found between nerve and muscle fiber conduction velocities in the thenar muscle of human subjects. The results indicate that the size principle that governs the relation between nerve and muscle fiber size is a fairly weak principle with occasional exceptions.
为了验证运动单位的神经纤维传导速度与该单位的肌纤维传导速度相关这一假设，采用碰撞技术来区分由刺激一组具有已知传导速度的神经纤维所引发的运动单位动作电位。肌纤维传导速度由表面电极阵列记录的该单位的传播动作电位来确定。在人类受试者的大鱼际肌中，发现神经纤维传导速度与肌纤维传导速度之间存在微弱但显著的正相关。结果表明，支配神经纤维与肌纤维大小关系的大小原则是一个相当弱的原则，偶尔会有例外。
