When a person loses some or all of the feeling in their penis, it has become numb. The penis contains many nerve endings, and it is usually very sensitive. Numbness can occur when a person sits in a certain position for a long time. It can also result from low testosterone levels, another health issue, or an injury.
Erectile dysfunction ED related to compromise of the nervous system is an increasingly common occurrence. This may be due to the multifactorial nature of ED, the myriad of disorders affecting the neurotransmission of erectogenic signals, and improved awareness and diagnosis of ED. Nevertheless, neurogenic ED remains poorly understood and characterized. Disease related factors such as depression, decreased physical and mental function, the burden of chronic illness, and loss of independence may preclude sexual intimacy and lead to ED as well. The amount of data regarding treatment options in subpopulations of differing neurologic disorders remains scarce except for men with spinal cord injury. The treatment options including phosphodiesterase inhibitors, intracavernosal or intraurethral vasoactive agents, vacuum erection devices VED and penile prosthetic implantation remain constant. This review discusses the options in specific neurologic conditions, and briefly provides insight into new and future developments that may reshape the management of neurogenic ED.
The penis is the male organ of copulation sexual intercourse. It is flaccid for non-sexual actions,such as urination and turgid and rod-like with sexual arousal. When erect, the stiffness of the organ allows it to penetrate into the vagina and deposit semen into the female reproductive tract. Three columns of erectile tissue make up most of the volume of the penis. The shaft of the penis surrounds the urethra Figure.
Erectile dysfunction is defined as the persistent inability to achieve or maintain penile erection sufficient for satisfactory sexual performance. The Massachusetts Male Aging Study surveyed 1, men aged 40—70 years between and and found there was a total prevalence of erectile dysfunction of 52 percent. It was estimated that, in , over million men worldwide experienced ED. For , the prevalence of ED is predicted to be approximately million worldwide. In the past, erectile dysfunction was commonly believed to be caused by psychological problems.