Subclavisu Anatomy

Subclavius Muscle

Origin:  First rib via costal cartilage
Insertion: By muscular fibers, to the groove on the inferior surface of the middle of the clavicle
Actions: Pulls the tip of the shoulder down and forward
Innervation: Subclavian branch of brachial plexus (C5, C6)
Blood Supply: Clavicular branch from the thoraco-acromial artery and the suprascapular artery.

Primary Actions of the Subclavius Muscle

1. Pulls the tip of the shoulder down and forwards.