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Pectoralis Major Muscle is the largest and most superficial muscle of the human chest. Also known as the "chest muscle," it plays a significant role in arm movements (flexion, adduction, internal rotation).Anatomical StructureThe Pectoralis Major Muscle is a thick, fan-shaped muscle located on the anterior thoracic wall. It consists of three main parts: the clavicular head, the sternocostal head, and the rarely present abdominal head. The clavicular head originates from the medial half of the cl

Minor Pectoral Muscle is a thin, triangular muscle located in the chest region. Situated beneath the major pectoral muscle, it originates from the third, fourth, and fifth ribs and inserts onto the coracoid process of the scapula. Innervated by the medial pectoral nerve, this muscle stabilizes the scapula against the thoracic wall, contributing to the stability of movement and posture of the upper limb. Due to its anatomical position and functions, it is a clinically and surgically significant s