![]() Upon entering the canal, the pudendal nerve gives rise to the inferior anal nerve (also called the inferior rectal nerve) that provides innervation for the external anal sphincter and the perianal skin. The pudendal artery, vein and nerve are collectively referred to as the pudendal neurovascular bundle. After passing through the foramen, the nerve courses through the gluteal region, running dorsal to the sacrospinous ligament and medial to the internal pudendal vessels.Īccompanied by the internal pudendal artery and vein, and the nerve to the obturator internus, the pudendal nerve passes through the lesser sciatic foramen and into the pudendal canal (Alcock canal). The nerve courses inferiorly and leaves the pelvis through the greater sciatic foramen. It arises in the pelvis close to the upper border of the sacrotuberous ligament and ischiococcygeus muscle. The pudendal nerve is one of the two main branches that originate from the sacral plexus, along with the sciatic nerve. Skin, organs, and muscles of the perineum and external genitalia in both sexes Key facts about the pudendal nerve Origin This article will discuss the anatomy and function of the pudendal nerve. It also provides motor supply for various pelvic muscles, the external urethral sphincter and the external anal sphincter. The main function of the pudendal nerve is to provide sensory supply to the external genitalia in both sexes and the skin around the anus, anal canal and perineum. It leaves the pelvic cavity through the greater sciatic foramen, hooks around the ischial spine enters the perineum through the lesser sciatic foramen. The nerve arises in the pelvic cavity from the sacral plexus, more specifically from the anterior rami of spinal nerves S2, S3 and S4. The pudendal nerve (S2-S4) is a mixed nerve mainly in charge of the sensory and motor supply of the perineumand external genitalia in both sexes. ![]()
0 Comments
Leave a Reply. |
AuthorWrite something about yourself. No need to be fancy, just an overview. Archives
December 2022
Categories |