Issue link: https://www.massageandbodyworkdigital.com/i/68012
functional anatomy BY CHRISTY CAEL PECTORALIS MINOR Welcome to Functional Anatomy. Each issue, this column will profile a muscle that can be difficult to palpate, is frequently dysfunctional, and would benefit from manual techniques and stretches. PECTORALIS MINOR Actions • Protracts and depresses the scapula • Elevates ribs 3–5 Innervation • Medial and lateral pectoral nerves • C5–8 and T1 The pectoralis minor has a strong attachment to the anteriorly protruding coracoid process of the scapula and functions as a tether for the scapula to the front of the rib cage. This helps stabilize the scapula anteriorly when body weight or external force is placed through the arms. Pectoralis minor works in tandem with the serratus anterior to hold the scapula against the body when you push yourself up with your arms. This anchoring of the scapula is necessary when you push yourself up out of a chair or off the ground when doing push-ups. These muscles, in conjunction with the subclavius, dynamically stabilize the shoulder girdle and maintain its posture against the rib cage. Pectoralis minor also serves as a Attachments • Origin: ribs 3-5 • Insertion: coracoid process of the scapula secondary respiratory muscle: by fixing the scapula and elevating ribs 3–5 at its origin, it helps expand the rib cage and increase space in the thoracic cavity. In this function, pectoralis minor works with the diaphragm, external intercostals, scalenes, serratus anterior, serratus posterior superior and inferior, and quadratus lumborum. visit massageandbodywork.com to access your digital magazine 99