subcostal muscle

The Subcostales (Infracostales) consist of muscular and aponeurotic fasciculi, which are usually well-developed only in the lower part of the thorax; each originates from the inner surface of one rib, and is inserted into the inner surface of the second or third rib above, near its angle. Their fibers run in the same direction as those of the Intercostales interni. Every claim on this page comes from the Leumas anatomy graph and carries its source.

What the subcostal muscle is

The Subcostales (Infracostales) consist of muscular and aponeurotic fasciculi, which are usually well-developed only in the lower part of the thorax; each originates from the inner surface of one rib, and is inserted into the inner surface of the second or third rib above, near its angle. Their fibers run in the same direction as those of the Intercostales interni. The atlas records it as a muscle at the organ scale in the human body.

Where the subcostal muscle is

It sits in the thorax and trunk, within the muscular system. Not positioned individually, and containment is not asserted either. Drawn near structures of the same kind, which is a weak claim about location.

What the subcostal muscle connects to

The atlas records 4 typed relationships for it, across 4 kinds of connection. a kind of chest muscle.

Supply and innervation

Innervation: intercostal nerve.

Also called

Also recorded as musculus subcostalis, subcostal muscles, subcostales, subcostales muscle, subcostales muscles and subcostalis. Searching any of those names reaches this page.

Source

Uberon multi-species anatomy ontology (Mungall et al.), CC BY 4.0. Term UBERON:0008618, version 2026-06-19, retrieved 2026-08-24. Licence: CC-BY-4.0.

• A kind of: chest muscle.
• Innervated by: intercostal nerve.
• inserts into: rib.
• originates from: rib.

Questions

Where is the subcostal muscle?

It sits in the thorax and trunk, within the muscular system. Not positioned individually, and containment is not asserted either. Drawn near structures of the same kind, which is a weak claim about location.

What does the subcostal muscle connect to?

A kind of: chest muscle.

Is the subcostal 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.