Prostatic plexus (nervous)

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The prostatic plexus is a network of nerves that is part of the autonomic nervous system. It is primarily involved in the innervation of the prostate gland, seminal vesicles, and the corpora cavernosa of the penis. This plexus plays a crucial role in the male reproductive system, particularly in the mechanisms of erection and ejaculation.

Anatomy

The prostatic plexus is an extension of the inferior hypogastric plexus, which is also known as the pelvic plexus. It is located in the pelvic cavity, surrounding the prostate gland. The nerves within the prostatic plexus are both sympathetic and parasympathetic in nature.

Sympathetic Fibers

The sympathetic fibers originate from the lumbar spinal cord and travel through the hypogastric nerves to reach the inferior hypogastric plexus. These fibers are responsible for the contraction of the smooth muscle in the prostate and seminal vesicles during ejaculation.

Parasympathetic Fibers

The parasympathetic fibers arise from the sacral spinal cord (S2-S4) and travel through the pelvic splanchnic nerves to join the inferior hypogastric plexus. These fibers are crucial for the process of erection, as they facilitate the relaxation of the smooth muscle in the corpora cavernosa, allowing for increased blood flow.

Function

The primary function of the prostatic plexus is to provide autonomic innervation to the prostate gland, seminal vesicles, and the erectile tissues of the penis. This innervation is essential for the normal functioning of the male reproductive system, including the processes of erection and ejaculation.

Clinical Significance

Damage to the prostatic plexus can occur during prostatectomy or other surgical procedures involving the prostate gland. Such damage can lead to complications such as erectile dysfunction and urinary incontinence. Preservation of the prostatic plexus during surgery is crucial for maintaining sexual and urinary function.

Related Pages

• Prostate gland
• Seminal vesicles
• Corpora cavernosa
• Erection
• Ejaculation
• Inferior hypogastric plexus
• Sympathetic nervous system
• Parasympathetic nervous system
• Pelvic splanchnic nerves
• Prostatectomy
• Erectile dysfunction
• Urinary incontinence