PMID: 2505425Jan 1, 1989Paper

Neurophysiology of penile erection

Urological Research
K P JünemannP Alken

Abstract

In 6 dogs and 6 monkeys electrical stimulation of the cavernous, pudendal and hypogastric nerve was performed to gain better understanding of the erectile neurophysiology. Arterial flow, intracorporeal pressure and venous restriction studies during single and combined neurostimulation demonstrated that initiation and maintenance of erection is a parasympathetic phenomenon. Penile rigidity however, could only be achieved with additional pudendal nerve stimulation resulting in muscular compression of the blood distended cavernous bodies. Detumescence or subsidence of erection is primarily under sympathetic control, due to inhibition of sinusoidal smooth muscle relaxation. On the basis of our observations we conclude that penile erection is dependent upon three neurophysiological mechanisms: 1. the parasympathetic "vascular mechanism", the somatomotor "muscular mechanism" and the sympathetic "inhibitory mechanism".

Citations

Apr 1, 1997·Acta Neurologica Scandinavica·K V Andersen, G Bovim
May 2, 2001·Current Medical Research and Opinion·M A KhanD P Mikhailidis
Aug 1, 1993·The Journal of Urology·F GiulianoJ P Rousseau
May 8, 1999·BJU International·W NayalU Engelmann
Oct 1, 1993·Urology·S CarrierT F Lue

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