The pectoralis minor is a muscle of the anterior chest wall. It lies underneath the larger pectoralis major and contributes to the anterior wall of the axilla.
- Attachments: Originates from the 3rd-5th ribs and inserts into the coracoid process of the scapula.
- Function: Stabilises the scapula by drawing it anteroinferiorly against the thoracic wall.
- Innervation: Medial pectoral nerve.
- Blood supply: Pectoral branch of thoracoacromial artery.