الفهرس 
Physiology of ErectionOnly 14 pages are availabe for public view
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Abstract
Impotence is estimated to affect about 10% of all men allover the ages,Epidemiologic studies
revealt:d that about one in five men over the age of 50 and one in four over the age of 65, suffer
from erecti le or ejaculatory dysfunction (Brelfbt, 1994).
However, data from United States and United Kingdom studies regarded that the prevalence of male
1rnpotence is approximately 5 % among 40 -year- olds, 10 %among men in their 60 s, 20 % jn their 70
s, 30-40 % in their 80 s and over 50 % of90-year-old men (Fig. 1.1) (Feldman et al, 1994).
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Fig. 1.1 The incidence of male impotence
increases with age from less than 5 % of men at
age 20 to over 50 %at age 90
Impotence was explained usuall y to be related to deep-
seated psychiatric knowledge of
problems, but the
the phannacology,
recent. advances in
met:banism and
haemodynamics of erection, have cleared the Wldcrstandin g of erectile dysfunction (Alan
Benetl, 19.93).
The diagnosis and treatment of the impotent malt patient have changed dramatically over the past
few years , these changes art based on a better understanding of the pathophysiology of impotence,
and the evaluation of newer diagnostic and therapeutic modalities which not only assisted iu
differentiating psychogenic from organic impotence , but also helped to subclasify impotent
patients into many types aooording to the actual etiology such as vasculogenic , ueurogenic ,
endocrinologic and drug induced impotence
(Awn Benett, 1993).
Aim of tht work
This work is aiming to review the mol’t updat ed studies and works regarding the etiology of
erectile dysfunction, the evenLc; involved in the pathogenesis of erectile dysfunction, and the
recent advances in the non surgical treatment modalities of erectile dysfunction.