Prof. Dr.Mohamed Hamdy Abouel-Hassan

1.
3-Pathophysiologv
Review of literature
untreated arthritis. It similarly increased the probability for men on cardiac,
antihypertensive or vasodilator medications.
Physiology
of Erectile Function
The penile erectile tissue, specifically the cavernous smooth musculature
and the smooth muscles of the arteriolar and arterial walls, plays a key role
in the erectile process. In the flaccid state, these smooth muscles are
tonically contracted, allowing only a small amount of arterial flow for
nutritional purposes. The flaccid penis is in a moderate state of contraction,
as evidenced by further shrinkage in cold weather and after phenylephrine
injection. Sexual stimulation triggers release of neurotransmitters from the
cavernous nerve terminals. This results in relaxation of these smooth
muscles and the following events (Fig.5):
Figure (5) The mechanism of penile erection A in the flaccid. B in the erect state