Serratus Anterior - Podcast Version 0:00 / 0:00 1x 0.25x 0.5x 0.75x 1x 1.25x 1.5x 1.75x 2x The serratus anterior is a muscle of the anterior chest wall. It forms the medial border of the axilla region. Attachments: The muscle consists of several strips, which originate from the lateral aspects of ribs 1-8. They attach to the costal (rib facing) surface of the medial border of the scapula. Function: Rotates the scapula, allowing the arm to be raised over 90 degrees. It also protracts the scapula, holding it against the ribcage. Innervation: Long thoracic nerve. Blood supply: Thoracodorsal artery, superior thoracic artery, lateral thoracic 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 serratus anterior muscle? The serratus anterior is a muscle located on the anterior chest wall, forming the medial border of the axilla. It consists of several strips that originate from the lateral aspects of ribs 1-8 and attach to the scapula. What are the functions of the serratus anterior? The serratus anterior rotates the scapula, enabling the arm to be raised above 90 degrees. Additionally, it protracts the scapula, securing it against the ribcage during movement. Which nerve innervates the serratus anterior? The serratus anterior is innervated by the long thoracic nerve. This nerve is crucial for the muscle's function in scapular movement. Where does the serratus anterior attach? The serratus anterior attaches to the costal surface of the medial border of the scapula. Its origins are from the lateral aspects of ribs 1-8, facilitating its role in scapular movement. What is the blood supply to the serratus anterior? The serratus anterior receives blood from the thoracodorsal artery, superior thoracic artery, and lateral thoracic artery. These vessels provide essential nutrients and oxygen for the muscle's function. Rate This Article