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. By TeachMeSeries Ltd (2025) Fig 1The serratus anterior and pectoralis minor muscles. 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