What is Erectile Dysfunction?
Erectile dysfunction (ED) is sexual
dysfunction characterized by the inability to develop or maintain an erection
of the penis during sexual performance.
A penile erection is the hydraulic effect
of blood entering and being retained in sponge-like bodies within the penis.
The process is often initiated as a result of sexual arousal, when signals are
transmitted from the brain to nerves in the penis. Erectile dysfunction is
indicated when an erection is difficult to produce. There are various
circulatory causes, including alteration of the voltage-gated potassium
channel, as in arsenic poisoning from drinking water.The most important organic
causes are cardiovascular disease and diabetes, neurological problems (for
example, trauma from prostatectomy surgery), hormonal insufficiencies
(hypogonadism) and drug side effects.
Psychological impotence is where erection
or penetration fails due to thoughts or feelings (psychological reasons) rather
than physical impossibility; this is somewhat less frequent but often can be
helped. Notably in psychological impotence, there is a strong response to
placebo treatment. Erectile dysfunction, tied closely as it is about ideas of
physical well being, can have severe psychological consequences.
The Latin term impotentia coeundi describes
simple inability to insert the penis into the vagina. It is now mostly replaced
by more precise terms. The study of erectile dysfunction within medicine
is covered by andrology, a sub-field within urology.
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