iliocostalis muscle in dogs

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 dog.

Where the iliocostalis muscle is

It sits within the muscular system. Only the system is known. The position shown carries almost no spatial information.

What the iliocostalis muscle connects to

The atlas records 6 typed relationships for it, across 5 kinds of connection. part of erector spinae muscle group.

Supply and innervation

This dataset asserts no arterial supply, venous drainage or innervation for the iliocostalis 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 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: skeletal muscle organ, vertebrate.
• originates from: fused sacrum and neural spine.
• inserts into: rib.
• subtype: iliocostalis thoracis muscle.

Questions

Where is the iliocostalis muscle?

It sits within the muscular system. Only the system is known. The position shown carries almost no spatial information.

What does the iliocostalis muscle connect to?

Part of: erector spinae muscle group.

Is the iliocostalis muscle the same in other species?

This page describes the dog. The human record of the same structure sits beside it on /compare, over one shared model rather than two atlases built separately.