Nakanishi T
Mishuku Hospital.
Rinsho Shinkeigaku. 1991 Dec;31(12):1326-9.
Recently, many attempts have been made to measure the difference in velocity between the fastest and slowest fibers in a nerve trunk or to estimate the nerve fiber conduction velocity distribution in a nerve bundle using several different methods, such as collision technique (Hopf 1963) and computer analysis of the compound action potentials (Cummins et al. 1979; Barker et al. 1979). For the computer analysis, however, some assumptions in regard to the quantitative relationship among conduction velocity, single fiber action potential and fiber diameter are necessary, and there has been little agreement about them. There is also a problem about the relationship between conduction velocity and refractory period in Hopf's technique. Using a collision technique with a method of 3-point stimulation, Gilliat et al. (1976) now suggested that surface recording was unsatisfactory for measuring the velocity of the slow-conducting nerve fibers. With this method, however, we had a preliminary experiment to analyze conduction velocities of so-called A fibers in the bullfrog's sciatic-peroneal nerve using fluid electrode, and they were divided into 3 groups (Nakanishi et al. 1986). These findings were in good agreement with those obtained by Erlanger and Gasser (1937) using monophasic recording. Therefore, clinical measurement of the nerve conduction velocities with a method of this collision technique was performed using surface recording.
最近，人们进行了许多尝试，采用几种不同的方法来测量神经干中最快和最慢纤维之间的速度差异，或估计神经束中的神经纤维传导速度分布，例如碰撞技术（霍普夫，1963年）以及复合动作电位的计算机分析（卡明斯等人，1979年；巴克等人，1979年）。然而，对于计算机分析而言，关于传导速度、单纤维动作电位和纤维直径之间的定量关系需要一些假设，而对此几乎没有达成共识。在霍普夫的技术中，传导速度和不应期之间的关系也存在问题。吉利亚特等人（1976年）采用三点刺激法的碰撞技术，现在认为表面记录对于测量慢传导神经纤维的速度并不令人满意。然而，使用这种方法，我们进行了一项初步实验，采用液体电极分析牛蛙坐骨 - 腓总神经中所谓A纤维的传导速度，并且将它们分为3组（中西等人，1986年）。这些发现与厄兰格和加塞（1937年）使用单相记录所获得的结果非常一致。因此，采用这种碰撞技术的方法，使用表面记录进行了神经传导速度的临床测量。
