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Erectile Dysfunction Pathophysiology

Penile erection is managed by two different mechanisms. The first one is the reflex erection, which is achieved by directly touching the penile shaft. The second is the psychogenic erection, which is achieved by erotic or emotional stimuli. The former uses the peripheral nerves and the lower parts of the spinal cord, whereas the latter uses the limbic system of the brain. In both conditions, an intact neural system is required for a successful and complete erection. Stimulation of penile shaft by the nervous system leads to the secretion of nitric oxide (NO), which causes the relaxation of smooth muscles of corpora cavernosa (the main erectile tissue of penis), and subsequently penile erection. Additionally, adequate levels of testosterone (produced by the testes) and an intact pituitary gland are required for the development of a healthy erectile system. As can be understood from the mechanisms of a normal erection, impotence may develop due to hormonal deficiency, disorders of the neural system, lack of adequate penile blood supply or psychological problems. Restriction of blood flow can arise from impaired endothelial function due to the usual causes associated with coronary artery disease, but can also be caused by prolonged exposure to bright light.

Male infertility

 

The male fertility process involves the production of mature sperm and getting the sperm to reach and fertilize the egg. Although it may seem to be a simpler process than female fertility, male fertility also requires many conditions to be met: the ability to have and sustain an erection, having enough sperm, having enough semen to carry the sperm to the egg, and having sperm of the right shape that move in the right way. A problem meeting any of these conditions contributes to infertility.

Like female infertility, male infertility can result from physical problems, such as testes that don’t make enough normal sperm, hormonal problems, and lifestyle or environmental factors, including (but not limited to):

Age
Stress
Exposing the testes to high temperatures, which can affect the ability of the sperm to move and to fertilize an egg. For instance:
Cryptorchism is a condition where the testes do not descend into the scrotum. Although it does not usually affect the ability to have and sustain an erection, cryptorchism means that the testes are still inside the body cavity, which has a higher temperature than the external scrotum.
Tight underwear—For some men, wearing tight underwear can also increase the temperature of the testes.
Smoking, drugs, and alcohol
Medications
Environmental toxins
Genetic conditions, such as Klinefelter syndrome
Other health problems

But, in some cases, health care providers cannot determine a cause for infertility in the man or woman. In addition, some known causes of infertility do not have any treatments.

Intersex

Intersex is a group of conditions where there is a discrepancy between the external genitals and the internal genitals (the testes and ovaries).

The older term for this condition, hermaphroditism, came from joining the names of a Greek god and goddess, Hermes and Aphrodite. Hermes was a god of male sexuality (among other things) and Aphrodite a goddess of female sexuality, love, and beauty.

Although the older terms are still included in this article for reference, they have been replaced by most experts (and patients and families) because they are misleading, confusing, and insensitive. Increasingly this group of conditions is being called disorders of sex development (DSDs).
Causes

Intersex can be divided into four categories:

46, XX Intersex
46, XY Intersex
True Gonadal Intersex
Complex or Undetermined Intersex

Each one is discussed in more detail below. Note: In many kids the cause of intersex may remain undetermined, even with modern diagnostic techniques.

 

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Auditions for teens

When teens audition it can enable them to sometimes play roles younger or older than the actual actor, depending on their look. With the age barrier, teen actors are only allowed to work so many hours a day and must sign agreements and contracts with a guardian as a co-signer. If you would like to find out more information about auditions for teens, go to teen auditions. Audition for teens is when actors between the ages of 13-18 audition for characters on TV, in Film, Theatre or Commercials.

What lies behind a great, wonderful, fabulous audition is first and foremost hard work. Kids can't control the casting people but they can always control their own journey to an A+ audition. Let's assume a kid has had excellent acting classes and maybe even some professional experience; so the acting ability is honed and ready. But, auditioning is a technique that can and must be learned--unless you were born knowing how to walk in and take over an audition room. The cold, hard fact is that a fabulous audition begins with preparation. To learn all about audition preparation visit kid auditions.

Pelvic Pain

Pelvic pain occurs mostly in the lower abdomen area. The pain might be steady, or it might come and go. If the pain is severe, it might get in the way of your daily activities.

If you're a woman, you might feel a dull pain during your period. It could also happen during sex. Pelvic pain can be a sign that there is a problem with one of the organs in your pelvic area, such as the uterus, ovaries, fallopian tubes, cervix or vagina. It could also be a symptom of infection, or a problem with the urinary tract, lower intestines, rectum, muscle or bone. If you're a man, the cause is often a problem with the prostate.

You might have to undergo a lot of medical tests to find the cause of the pain. The treatment will depend on the cause, how bad the pain is and how often it occurs.