iliococcygeus muscle

The Iliococcygeus arises from the ischial spine and from the posterior part of the tendinous arch of the obturator fascia, and is attached to the coccyx and anococcygeal raphC); it is usually thin, and may fail entirely, or be largely replaced by fibrous tissue. It is part of the levator ani group of muscles. An accessory slip at its posterior part is sometimes named the Iliosacralis. Every claim on this page comes from the Leumas anatomy graph and carries its source.

What the iliococcygeus muscle is

The Iliococcygeus arises from the ischial spine and from the posterior part of the tendinous arch of the obturator fascia, and is attached to the coccyx and anococcygeal raphC); it is usually thin, and may fail entirely, or be largely replaced by fibrous tissue. It is part of the levator ani group of muscles. An accessory slip at its posterior part is sometimes named the Iliosacralis. The atlas records it as a muscle at the organ scale in the human body.

Where the iliococcygeus muscle is

It sits in the pelvis and trunk, within the muscular system. Not positioned individually. Drawn inside the structure this dataset says contains it — the containment is asserted, the exact spot within it is not.

What the iliococcygeus muscle connects to

The atlas records 4 typed relationships for it, across 4 kinds of connection. part of levator ani muscle.

Supply and innervation

This dataset asserts no arterial supply, venous drainage or innervation for the iliococcygeus muscle. Only a minority of structures carry those edges here, so an empty answer means nothing has been recorded — not that there is nothing to record.

Also called

Also recorded as iliococcygeus, musculus iliococcygeus, iliococcygeal, iliococcygei, levator ani - iliococcygeus and levator ani-iliococcygeus. Searching any of those names reaches this page.

Source

Uberon multi-species anatomy ontology (Mungall et al.), CC BY 4.0. Term UBERON:0011511, version 2026-06-19, retrieved 2026-08-24. Licence: CC-BY-4.0.

• Part of: levator ani muscle.
• A kind of: muscle of pelvis.
• inserts into: coccyx.
• originates from: ischial spine.

Questions

Where is the iliococcygeus muscle?

It sits in the pelvis and trunk, within the muscular system. Not positioned individually. Drawn inside the structure this dataset says contains it — the containment is asserted, the exact spot within it is not.

What does the iliococcygeus muscle connect to?

Part of: levator ani muscle.

Is the iliococcygeus muscle the same in other species?

Leumas holds the same relationship vocabulary for every species it carries, so where another dataset records this structure you can put the two side by side on /compare.