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Cavernous Nerve Stimulation and Recording of Intracavernous Pressure in a Rat

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Evoked cavernous activity: neuroanatomic implications.

U Yilmaz¹, B Vicars, C C Yang

¹Department of Urology, University of Washington, Seattle, WA 98195-6510, USA.

International Journal of Impotence Research

|July 18, 2009

Summary

This summary is machine-generated.

Evoked cavernous activity (ECA) is absent in men with spinal cord injury (SCI) but preserved after pelvic surgery, indicating intact autonomic innervation of the penis in surgical patients.

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Area of Science:

Neuroscience
Urology
Autonomic Nervous System Research

Background:

Autonomic innervation of the penis is crucial for erectile function.
Assessing this innervation is important for understanding sexual dysfunction post-neurological injury or surgery.

Purpose of the Study:

To investigate the autonomic innervation of the penis using evoked cavernous activity (ECA).
To compare ECA in men with thoracic spinal cord injury (SCI) and sexual dysfunction with that in men undergoing pelvic surgery (PS).

Main Methods:

ECA was measured via electromyography needles in the cavernous bodies after median nerve stimulation.
Sympathetic skin responses (SSRs) from the hand and foot were recorded as controls.
Measurements were taken in SCI patients and in PS patients pre- and postoperatively.

Main Results:

ECA and foot SSRs were absent in most SCI patients, while hand SSRs were present.
All PS patients demonstrated reproducible ECA and SSRs both pre- and postoperatively.
No significant differences in ECA or SSR latency/amplitude were observed between pre- and postoperative periods in PS patients.

Conclusions:

Evoked cavernous activity (ECA) is absent in men with SCI above the sympathetic outflow to the genitalia.
ECA is preserved in men after radical pelvic surgery, indicating preserved sympathetic innervation to the penis.