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Subcostal muscles

Alexey Portnov, medical expert
Last reviewed: 23.04.2024

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Subcostal muscles (mm. Subcostales) are formed by muscle and tendon bundles in the lower part of the posterior part of the inner surface of the chest wall. Begin on the X-XII ribs near their corners, are directed upward and laterally, they are thrown over one or two ribs and attached to the inner surface of the overlying ribs.

Function of the subcostal muscles: lower the ribs.

Innervation of the subcostal muscles: intercostal nerves (ThI-ThXI).

Blood supply to the subcostal muscles: posterior intercostal arteries.

trusted-source [1], [2], [3], [4]