Name
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.