Name

# Iliococcygeus (part of Levator Ani)

Pronunciation

(ilio-cock-se-GE E-us)

Origin/Proximal Attachment

Ischial spine & medial border of ischial body.

Insertion/Distal Attachment

Coccyx & anococcygeal ligament

Action/Relevance

Forms part of the pelvic floor to support pelvic viscera

Innervation

Nerves from S3, 4 & inferior rectal nerve

Notes

The Iliococcygeus arises from the ischial spine and from the posterior part of the tendinous arch of the pelvic fascia, and is attached to the coccyx and anococcygeal raphé; it is usually thin, and may fail entirely, or be largely replaced by fibrous tissue. An accessory slip at its posterior part is sometimes named the Iliosacralis.