Nerves Scrotal Posterior

The Scrotal Posterior Nerve (Latin: Nervus Scrotalis Posterior) is a posterior nerve in the male pelvic cavity that innervates the muscles and fascia of the lower body. It is also responsible for the innervation of the testicles, prostate and seminal vesicles.

The nerve originates from the posterior hypogastric plexus, which is also involved in the formation of the greater pudendal nerves. The posterior scrotal nerve is one of the largest nerves in the pelvic area, its terminal branches contain afferent and efferent fibers that are connected to many of the internal pelvic organs.

The posterior scrotal nerve passes through the posterior wall of the inguinal canal, where it divides into three large branches:

Branch to the testicle (genucomaldei) - the nerve enters the testicular body at the apex of the testicle and passes through the anterior scrotal ligament into the connected space between the vas deferens and the superior pair of spermatic veins. In the scrotum it ends at the intersection with the membranes and the superficial layer of the retina of the testicle. Inside the testicle, the nerve forms branches associated with the blood supply to the organ. Branch of the lumbar nerve (nervus pubicus lateralis) is a superficial branch passing through the bodies and necks of the lower lumbar vertebrae; it passes across the entrance to the ischiorectal foramen and innervates the external genitalia. The pubic branch is an internal branch that runs parallel to the pubic symphysis and descends the wall of the dorsal cavity of the pelvic cavity, and is innervated by the iliac or innominate nerve.

When the nerve is dysfunctional, pain occurs in the scrotum, lower back, thigh, or anus. Sudeck's syndrome, manifested by hyperesthesia, hyperalgesia, or neurovascular process of the scrotal skin, is common.