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. Adobe Stock, Licensed to TeachMeSeries Ltd Fig 1The subclavius muscle of the anterior chest wall. Pro Feature - 3D Model You've Discovered a Pro Feature Access our 3D Model Library Explore, cut, dissect, annotate and manipulate our 3D models to visualise anatomy in a dynamic, interactive way. Learn More Print Article Rate This Article