INFERIOR RECTAL NERVE

 

ORIGIN: Pudendal nerve.

COURSE/DISTRIBUTION: This nerve takes its origin from the pudendal nerve at the pudendal canal. It then pierces the medial wall of that canal and crosses the ischiorectal fossa accompanied by the inferior rectal vessels. It reaches the external anal sphincter and distributes its branches in and around that sphincter supplying the perianal skin and the lower part of anal canal.

BRANCHES: Cutaneous branches mainly, but muscular branches to the external anal sphincter.

 

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