Audio LecturePro Feature Subclavius 0:00 / 0:00 1x 0.25x 0.5x 0.75x 1x 1.25x 1.5x 1.75x 2x 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. 3D ModelPro Feature 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 Frequent questions What is the subclavius muscle? The subclavius is a small muscle located beneath the clavicle, forming part of the anterior chest wall. It plays a role in stabilising and depressing the clavicle during arm movements. Where does the subclavius muscle originate and insert? The subclavius originates from the junction of the first rib and its costal cartilage and inserts onto the inferior surface of the middle third of the clavicle. This positioning is crucial for its function in stabilising the shoulder girdle. What is the primary function of the subclavius muscle? The primary function of the subclavius muscle is to anchor and depress the clavicle. This action helps maintain proper shoulder alignment and can assist in movements of the upper limb. How is the subclavius muscle innervated? The subclavius muscle is innervated by the nerve to subclavius. This nerve provides the necessary signals for muscle contraction and function. What is the blood supply for the subclavius muscle? The blood supply to the subclavius muscle comes from the clavicular branch of the thoracoacromial artery. This vascular supply is essential for delivering nutrients and oxygen to the muscle tissue. Rate This Article