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An erection clinically: penile erection or penile tumescence is a physiological phenomenon in which the penis becomes firm, engorged, and enlarged. Penile erection is the result of a complex interaction of psychological, neural, vascular, and endocrine factors, and is often associated with sexual arousal or sexual attraction , although erections can also be spontaneous. The shape, angle, and direction of an erection varies considerably in humans. Physiologically, erection is triggered by the parasympathetic division of the autonomic nervous system , causing the levels of nitric oxide a vasodilator to rise in the trabecular arteries and smooth muscle of the penis.
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Erectile Dysfunction in the Elderly: An Old Widespread Issue with Novel Treatment Perspectives

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Physiology of Penile Erection and Pathophysiology of Erectile Dysfunction

Erectile dysfunction ED is one of the most common chronic diseases affecting men and its prevalence increases with aging. It is also the most frequently diagnosed sexual dysfunction in the older male population. A number of different diseases potentially worsening sexual function may occur in elderly people, together with polypharmacy. Related causes of ED are variable and can include arterial, neurogenic, hormonal, cavernosal, iatrogenic, and psychogenic causes. The aim of the present review was to examine the main aspects of erectile dysfunction going through epidemiology and pathophysiology and revise most of ED in elderly disabled men and in those affected with psychiatric disorders. Lastly we tried to focus on the main aspects of nonpharmacological and pharmacological treatments of ED and the recreational use in the elderly.
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Everything You Need To Know About Morning Wood

We include products we think are useful for our readers. If you buy through links on this page, we may earn a small commission. From time to time, men may wake up with an erect penis. This is most common in younger men, although men of all ages may experience NPT.
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Try out PMC Labs and tell us what you think. Learn More. The molecular and clinical understanding of erectile function continues to gain ground at a particularly fast rate. Intensive research has yielded many advances. The understanding of the nitric oxide pathway has aided not only in the molecular understanding of the tumescence but also aided greatly in the therapy of erectile dysfunction.
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