The pectoralis major's primary functions are flexion, adduction, and internal rotation of the humerus. The pectoral major may colloquially be referred to as "pecs", "pectoral muscle", or "chest muscle", …

Nov 3, 2023 · The pectoralis major muscle is a broad superficial muscle found superficially in the anterior chest wall. In males, it is covered by the deep layer of fascia, subcutaneous tissue and the …

The pectoralis major is the superior most and largest muscle of the anterior chest wall. It is a thick, fan-shaped muscle that lies underneath the breast tissue and forms the anterior wall of the axilla[1].

May 5, 2023 · The pectoralis major is a large, triangular, or fan-shaped superficial muscle lying at the anteriormost position in the chest cavity. It forms the front wall of the axilla, making up most of the …

Nov 6, 2025 · The pectoral region is located on the anterior chest wall. It contains four muscles that exert a force on the upper limb: the pectoralis major, pectoralis minor, serratus anterior and subclavius.

Explore the comprehensive anatomy of the pectoralis major muscle, its origin, insertion, actions, and clinical correlations.

Sep 8, 2025 · Learn the anatomy of the Pectoralis Major muscle—covering origin, insertion, function, innervation, and clinical insights. Anatomy Breakdown by Treadwell, DPT.

The pectoralis major muscle is located in the chest region of the human body. It is a broad, triangular muscle that originates from the sternum, clavicle, and the outer surfaces of the ribs.

The Pectoralis major is a thick, fan-shaped muscle, situated at the upper and forepart of the chest.

Nov 11, 2025 · The pectoralis major muscle is a large fan-shaped muscle of the pectoral region, overlying the anterior chest wall but often considered an upper limb muscle due to its function.