Subclavian muscle

Synonyms

Latin: Musculus subclavius

Definition

The subclavian muscle is a short, narrow muscle that belongs to the deeper shoulder and chest muscles. It is supplied with blood via the internal thoracic artery. It primarily stabilizes the clavicle. It also protects adjacent structures, namely the subclavian artery and vein and the brachial plexus, by cushioning them against the bone.

History

Base: underside of the clavicle Origin: first rib and first costal cartilage Innervation: subclavian nerve (C5, C6)

Function

The subclavian muscle stabilizes the collarbone and cushions adjacent arteries and veins, as well as nerve cords against it. When tensed, it pulls the collarbone downwards.