[Physiology of penile erection].
Penile smooth muscle tone (arterial and trabecular) regulates the hemodynamic phenomena of erection. Nitric oxide is perhaps the most important mediator of penile smooth muscle relaxation and, consequently, of erection. Detumescence of the erect penis following contraction of the smooth muscles is mediated by the adrenergic nerves, which release noradrenalin that acts on alpha 1 adrenergic receptors. Other substances such as endothelin and prostanoids appear to be implicated in maintaining penile relaxation.
Sáenz de Tejada Y Gorman
I
I
Unidad de Urología y Andrología, Hospital Ruber Internacional, Madrid, España.
D006801:Humans; D008297:Male; D009126:Muscle Relaxation; D009130:Muscle, Smooth; D010410:Penile Erection / Q000502:physiology*; D010413:Penis / Q000098:blood supply
Fisiología de la erección del pene.