Pubococcygeus Detail

musculus pubococcygeus detail

The pubococcygeus is the anterior part of the levator ani, the most consistently described component. It compresses the vaginal canal and contributes to urinary continence by supporting the urethra.

Nerve: Pudendal nerve branches and S3-S4 direct branches Blood Supply: Internal pudendal artery Region: Abdomen

Anatomical Data

Origin, Insertion & Supply

Origin	Posterior surface of the pubic body — on both sides of the pubic symphysis
Insertion	Anococcygeal ligament, coccyx, and sides of the anal canal
Nerve Supply	Pudendal nerve branches and S3-S4 direct branches
Blood Supply	Internal pudendal artery

Biomechanics

Function & Actions

Actions	Elevates the pelvic floor and anorectal junction; Compresses the vagina and rectum — essential for continence; Forms the anterior levator ani

Clinical Relevance

Clinical Notes

Pubococcygeus avulsion from the pubic bone during delivery is the most common levator ani injury. It leaves a characteristic defect on MRI at the pubic bone insertion. Levator ani avulsion is the strongest anatomical predictor of pelvic organ prolapse.

Palpation

Palpated on vaginal examination as the anterior levator band — voluntary contraction elevates the examining finger.

Pathology

Common Injuries & Conditions

Pubococcygeus Avulsion as Prolapse Predictor

Pubococcygeus detachment from the pubic bone on MRI as the strongest predictor of future pelvic organ prolapse after vaginal delivery.