The serratus anterior muscle is a fan-shaped muscle at the lateral wall of the thorax. Its main part lies deep under the scapula and the pectoral muscles. It is easy to palpate between the pectoralis major and latissimus dorsi muscles. In athletic bodies the muscle may be even visible to the naked eye along the ribs underneath the axilla. The serratus anterior muscle originates from the 1st to 8th or 9th ribs and inserts at the anterior surface of the scapula. Due to its course it has a “serrate