一种测定阴部神经运动潜伏期及至肛门外括约肌的中枢运动传导时间的新方法。

A new method to determine pudendal nerve motor latency and central motor conduction time to the external anal sphincter.

作者信息

Jost W H, Schimrigk K

机构信息

Dept. of Neurology, University of Saarland, Homburg/Saar, Germany.

出版信息

Electroencephalogr Clin Neurophysiol. 1994 Jun;93(3):237-9. doi: 10.1016/0168-5597(94)90046-9.

DOI:10.1016/0168-5597(94)90046-9

PMID:7515801

Abstract

By placing the earth electrode between the site of the stimulus and the site of derivation, peripheral motor latency to the external anal sphincter can be determined and thus central motor conduction time (CMCT) can be calculated. In 18 volunteers we found a total motor conduction time of 19.4 msec (S.D. 1.71) after stimulation of the motor cortex and recording above the external anal sphincter. Latency was 5.6 msec (S.D. 0.66) when stimulated above L1 and pudendal latency (MEPuL) after stimulation above S3 was 2.5 msec (S.D. 0.32). CMCT to L1 (TMCT minus MCT to L1) was 13.8 msec (S.D. 1.13) and to S3 (TMCT minus MEPuL) it was 16.9 msec (S.D. 1.67). This method allows us to locate spinal dysfunction more precisely and also improves diagnosis of a possible neuropathy of the pudendal nerve.

摘要

通过将接地电极置于刺激部位与引出部位之间，可以测定至肛门外括约肌的外周运动潜伏期，从而计算出中枢运动传导时间（CMCT）。在18名志愿者中，刺激运动皮层并在肛门外括约肌上方进行记录时，我们发现总运动传导时间为19.4毫秒（标准差1.71）。在L1上方刺激时潜伏期为5.6毫秒（标准差0.66），在S3上方刺激后的阴部潜伏期（MEPuL）为2.5毫秒（标准差0.32）。至L1的CMCT（总运动传导时间减去至L1的运动传导时间）为13.8毫秒（标准差1.13），至S3的CMCT（总运动传导时间减去MEPuL）为16.9毫秒（标准差1.67）。这种方法使我们能够更精确地定位脊髓功能障碍，同时也改善了对阴部神经可能存在的神经病变的诊断。