Pudendal SEP study is a useful method of evaluating the patients with sexual dysfunction due to lesion is the course of afferent sensory tract from peripheral nerve to cerebral cortex.

The objectives of this study are to obtain the normal value of short latency of pudendal SEP and to show the clinical usefulness of pudendal SEP in the evaluation of sexual dysfunction.

Twenty normal adults and 74 patients with sexual dysfunction were studied.

The results are as follows:

1) The short latency of pudendal SEP in normal adult was 40.3±2.36 msec with normal range of 35.6~45.0 msec.

2) All of the patients with functional sexual dysfunction showed normal values.

3) Pudendal SEP study showed high incidence of abnormality in patients with spinal cord and pelvic trauma.