Pubococcygeus muscle

Origin: Back of the pubis and from the anterior part of the obturator fascia

Insertion: Coccyx and sacrum

Nerve: Levator ani nerve (S4) - inferior rectal nerve from pudendal nerve (S3, S4) - coccygeal plexus

Action: Controls urine flow and contracts during orgasm

Description:
The Pubococcygeus arisesfrom the back of the pubis and from the anterior part of the obturator fascia, and andldquo;is directed backward almost horizontally along the side of the anal canal toward the coccyx and sacrum, to which it finds attachment. Between the termination of the vertebral column and the anus, the two Pubococcygei muscles come together and form a thick, fibromuscular layer lying on the raphé formed by the Iliococcygeiandrdquo; (Peter Thompson). The greater part of this muscle is inserted into the coccyx and into the last one or two pieces of the sacrum. This insertion into the vertebral column is, however, not admitted by all observers.