Quick Facts
Origin: From the coccygeal plexus.
Course: Penetrates the coccygeus muscle and the overlying sacrospinous and sacrotuberous ligaments.
Branches: No named branches.
Supply: Skin of the perianal and coccygeal region.
Origin
Small anococcygeal nerves originate from the coccygeal plexus, which is formed by the union of the ascending anterior rami of fifth sacral and coccygeal nerves, with the anterior ramus of fourth sacral nerve.
Course
The anterior rami of fifth sacral and coccygeal nerves originate inferior to the pelvic floor. They ascend and penetrate the coccygeus muscle and enter the pelvic cavity. They join with the anterior ramus of fourth sacral to form the coccygeal plexus. Small anococcygeal nerves originate from the trunk. The nerves penetrate the coccygeus muscle and the overlying sacrospinous and sacrotuberous ligaments. They pass superficially to innervate the perianal skin in the anal triangle and the coccygeal region.
Branches
There are no named branches.
Supplied Structures & Function
The anococcygeal nerve supplies the perianal skin in the anal triangle and the accompanying coccygeal region.
