Nakamura H
Department of Orthopaedic Surgery, Osaka City University, Medical School, Japan.
Nihon Seikeigeka Gakkai Zasshi. 1990 Jan;64(1):27-42.
The phenomenon of positivisation in ascending cauda equina action potential (A-CEAP) was evaluated in 114 patients with lumbosacral lesions. These patients were divided into two groups, i.e., non-positivisation and positivisation group. In the former, positive wave ratio was highest at the L5/S upon stimulating the peroneal nerve. In the latter, the positivisation at the L4/5 upon stimulating the peroneal nerve spread not only to the cranial level but also to the caudal-L5/S level. Based on these experimental results, the factors causing positivisation in the L5/S level without lesion were: 1) curving effect of the L5 nerve root, 2) augmentation of current density within the spinal canal and 3) the amount of individual impulses propagating along the L5 and S1 root.
对114例腰骶部病变患者的马尾上升动作电位（A-CEAP）阳性化现象进行了评估。这些患者被分为两组，即非阳性化组和阳性化组。在非阳性化组中，刺激腓总神经时，L5/S处的正波比率最高。在阳性化组中，刺激腓总神经时L4/5处的阳性化不仅向头侧水平扩散，还向尾侧L5/S水平扩散。基于这些实验结果，在无病变的L5/S水平导致阳性化的因素有：1）L5神经根的弯曲效应；2）椎管内电流密度的增加；3）沿L5和S1神经根传播的单个冲动的数量。
