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Penile erection is managed by two mechanisms: the reflex erection, which is achieved by directly touching the penile shaft, and 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 the 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. online pharmacy cialis arizona buy cialis online
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Nocturnal penile tumescence (NPT) - It is normal for a man to have five to six erections during sleep, especially during rapid eye movement (REM). Their absence may indicate a problem with nerve function or blood supply in the penis. There are two methods for measuring changes in penile rigidity and circumference during nocturnal erection: snap gauge and strain gauge. A significant proportion of men who have no sexual dysfunction nonetheless do not have regular nocturnal erections. A study done at the Medical College of Georgia has found that venom from the Brazilian wandering spider contains a toxin, called Tx2-6, that causes erections. Scientists believe that combining this toxin with existing medication such as Viagra may lead to an effective treatment for erectile dysfunction. safe licensed online viagra buy viagra
To identify your pelvic floor muscles: firstly, contract the muscles that you would use to stop passing wind from your anus; secondly contract the muscles that you would use to stop the flow of urine. These are the muscles that can be trained and strengthened. Ideally, discuss this option with your GP. If this option is considered appropriate to try, then ideally you should see a physiotherapist for advice on exactly how to do the correct exercises. Also, see the references at the end of this article. One of the forms of phosphodiesterase is termed PDE5. The prescription PDE5 inhibitors sildenafil (Viagra), vardenafil (Levitra) and tadalafil (Cialis) are prescription drugs which are taken orally. They work by blocking the action of PDE5, which causes cGMP to degrade. Can Sexual Problems Be Prevented? While sexual problems cannot be prevented, dealing with the underlying causes of the dysfunction can help you better understand and cope with the problem when it occurs. There are some things you can do to help maintain good sexual function: Follow your doctor's treatment plan for any medical/health conditions. Limit your alcohol intake. Quit smoking. Deal with any emotional or psychological issues such as stress, depression, and anxiety. Get treatment as needed. Increase communication with your partner. Erectile Dysfunction At A Glance: Treatments include psychotherapy, adopting a healthy lifestyle, oral PDE5 inhibitors (Viagra, Levitra, and Cialis), intraurethral medications, intracavernosal injections, vacuum devices, surgery, and working with doctors to avoid medications that can impair erectile function.