Pectoralis Minor - Podcast Version 0:00 / 0:00 1x 0.25x 0.5x 0.75x 1x 1.25x 1.5x 1.75x 2x 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 (2026) 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 Pro Feature - Dissection Atlas You've Discovered a Pro Feature Access our Dissection Image Library Enhance your understanding with high-resolution dissection images showcasing real-life anatomy. Learn More Frequent questions What is the pectoralis minor muscle? The pectoralis minor is a muscle located in the anterior chest wall, situated beneath the larger pectoralis major. It plays a role in forming the front wall of the axilla. What are the attachments of the pectoralis minor? The pectoralis minor originates from the 3rd to 5th ribs and inserts into the coracoid process of the scapula. This positioning is crucial for its function in stabilising the scapula. What is the primary function of the pectoralis minor? The main function of the pectoralis minor is to stabilise the scapula by pulling it anteroinferiorly against the thoracic wall. This action is important for shoulder movement and stability. How is the pectoralis minor innervated? The pectoralis minor is innervated by the medial pectoral nerve. This nerve supply is essential for the muscle's contraction and function. What is the blood supply to the pectoralis minor? The blood supply to the pectoralis minor comes from the pectoral branch of the thoracoacromial artery. This vascularisation supports the muscle's metabolic needs during activity. Rate This Article