Erectile
dysfunction (ED)
Incidence and causes
of erectile dysfunction
What is erectile
dysfunction
Erectile dysfunction (ED) is the inability of a man to achieve or maintain an erection sufficient for his sexual needs or the needs of his partner. Most men experience this inability at some point in their lives, usually by age 40, and are not psychologically affected by it. Some men experience chronic, complete erectile dysfunction (impotence), and others achieve partial or brief erections. The majority of cases have an organic etiology, most commonly vascular disease that
decreases blood flow into the penis. Regardless of the primary cause, erectile dysfunction can have a negative impact on
self-esteem, quality of life and interpersonal relationships.
It has many causes, most of which are treatable, and is not an inevitable consequence of aging.
Erectile dysfunction
incidence and prevalence
An estimated 30 million men in the United States—10% of the male population—experience chronic erectile dysfunction, although as few as 5% seek treatment. It may affect 50% of men between the ages of 40 and 70. Transient lost or inadequate erection affects men of all ages.
Anatomy of the penis
The internal structure of the penis consists of two cylinder-shaped vascular tissue bodies (corpora cavernosa) that run throughout the penis; the urethra (tube for expelling urine and ejaculate); erectile tissue surrounding the urethra; two main arteries; and several veins and nerves. The longest part of the penis is the shaft, at the end of which is the head, or glands penis. The opening at the tip of the glands, which allows for urination and ejaculation, is the meatus.
Physiology of an erection
The physiological process of erection begins in the brain and involves the nervous and vascular systems. Neurotransmitters in the brain (e.g., epinephrine, acetylcholine, nitric oxide) are some of the chemicals that initiate it. Physical or psychological stimulation (arousal) causes nerves to send messages to the vascular system, which results in significant blood flow to the penis. Two arteries in the penis supply blood to erectile tissue and the corpora cavernosa, which become engorged and expand as a result of increased blood flow and pressure. Because blood must stay in the penis to maintain rigidity, erectile tissue is enclosed by fibrous elastic sheathes (tunicae) that cinch to prevent blood from leaving the penis during erection. When stimulation ends, or following ejaculation, pressure in the penis decreases, blood is released, and the penis resumes its normal shape.
Treating
erectile dysfunction
The first step in treating
erectile dysfunction is that the individual understands the psychology, physiology and anatomy responsible for the ability to achieve and maintain an erection. If we can comprehend these events than we can better understand the factors that are responsible for
erectile dysfunction and address the questions concerning treatment.
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For
further resources about sexual impotence, erectile dysfunction and
frigidity, please see:
Sexual impotence
How
to fight impotence with Virilplant®
Sexual
impotence
Causes
for impotence
Impotence
F.A.Q.
Is
impotence only psychological?
All
the types of impotence
Arteriogenic
impotence
Venogenic
impotence
Neurogenic
impotence
Impotence
from diabetes
Endocrinologic
impotence
Psychogenic
impotence
How
to prevent impotence
Garlic
against impotence
Symptoms
of impotence
Erectile
dysfunction
Erectile
dysfunction and penis erection
Erectile
dysfunction: definition and prevalence
Knowing
erectile dysfunction
Causes
for erectile dysfunction
Types
of erectile dysfunction
Treatments
for erectile dysfunction
Erectile
dysfunction F.A.Q.
Frigidity
How
to fight frigidity with Virilplant®
Frigidity
the female sexual dysfunction
Definition
of frigidity
Common
causes for frigidity
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Last
revision:
09/20/2011
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