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

Electroencephalography and Clinical Neurophysiology
W H Jost, K Schimrigk

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.

References

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Citations

Jul 1, 1994·Diseases of the Colon and Rectum·W H Jost, K Schimrigk
Nov 27, 2004·Experimental Brain Research·Jean-Pascal Lefaucheur
Feb 18, 2003·Acta chirurgica Iugoslavica·A Shafik
Nov 5, 2003·Neurourology and Urodynamics·Søren Brostrøm
Jun 17, 2003·Neurourology and Urodynamics·Soren BrostromGunnar Lose
Jul 19, 2005·Muscle & Nerve·Jean-Pascal Lefaucheur
Nov 15, 2000·Obstetrical & Gynecological Survey·R P Goldberg, P K Sand
Mar 14, 2001·Archives of Physical Medicine and Rehabilitation·T Y ChuangW Y Guo

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