erectile dysfunction (ed), also known as impotence,is the inability to achieve or sustain an erection for satisfactory sexual activity. erectile dysfunction is different from otherconditions that interfere with male sexual intercourse, such as lack of sexual desire(decreased libido) and problems with ejaculation and orgasm (ejaculatory dysfunction).
penis erection, ed affects about 50% of men aged 40 and over. this article focuses on the evaluation andtreatment of erectile dysfunction. what are erectile dysfunction symptoms andsigns? symptoms of erectile dysfunction may includethe following:
â€¢ penile erection occurs but it is not maintainedfor the length of sexual activity â€¢ penile erection that is not firm enoughto penetrate the vagina â€¢ inability to obtain a penile erection what is normal penis anatomy? the penis contains two chambers, called thecorpora cavernosa, which run the length of the upper side of the penis . the urethra,which is the channel for urine and ejaculate, runs along the underside of the corpora cavernosa. filling the corpora cavernosa is a spongytissue consisting of smooth muscles, fibrous tissues, veins, and arteries.
a membrane, called the tunica albuginea, surroundsthe corpora cavernosa. veins located in the tunica albuginea drainblood out of the penis. the corpus spongiosum helps maintain the urethraopen during an erection for passage of the ejaculate (sperm and prostatic fluid)