The subclavius is a muscle of the anterior chest wall. It is small muscle, located directly underneath the clavicle.
- Attachments: Originates from the junction of the 1st rib and its costal cartilage. Inserts onto the inferior surface of the middle third of the clavicle.
- Function: Anchors and depresses the clavicle.
- Innervation: Nerve to subclavius.
- Blood supply: Clavicular branch of thoracoacromial artery.