iliocostalis muscle

The iliocostalis is the muscle immediately lateral to the longissimus that is the nearest to the furrow that separates the epaxial muscles from the hypaxial. It lies very deep to the fleshy portion of the serratus ventralis (serratus anterior). [WP,unvetted]. Every claim on this page comes from the Leumas anatomy graph and carries its source.

What the iliocostalis muscle is

The iliocostalis is the muscle immediately lateral to the longissimus that is the nearest to the furrow that separates the epaxial muscles from the hypaxial. It lies very deep to the fleshy portion of the serratus ventralis (serratus anterior). [WP,unvetted]. The atlas records it as a muscle at the organ scale in the human body.

Where the iliocostalis muscle is

It sits within the muscular system. Positioned deliberately as part of this species body plan.

What the iliocostalis muscle connects to

The atlas records 9 typed relationships for it, across 6 kinds of connection. part of erector spinae muscle group.

Supply and innervation

Innervation: dorsal ramus of spinal nerve.

Also called

Also recorded as iliocostal muscle, iliocostalis, musculus iliocostalis and lateral column of erector spinae. Searching any of those names reaches this page.

Source

Uberon multi-species anatomy ontology (Mungall et al.), CC BY 4.0. Term UBERON:0002251, version 2026-06-19, retrieved 2026-08-24. Licence: CC-BY-4.0.

• Part of: erector spinae muscle group.
• A kind of: muscle of vertebral column.
• subtype: iliocostalis cervicis muscle, iliocostalis lumborum and iliocostalis thoracis muscle.
• originates from: fused sacrum and neural spine.
• Innervated by: dorsal ramus of spinal nerve.
• inserts into: rib.

Questions

Where is the iliocostalis muscle?

It sits within the muscular system. Positioned deliberately as part of this species body plan.

What does the iliocostalis muscle connect to?

Part of: erector spinae muscle group.

Is the iliocostalis 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.