The pectoralis major (from Latin pectus ' breast ') is a thick, fan-shaped or triangular convergent muscle of the human chest. It makes up the bulk of the chest muscles and lies under the breast.

Pectoralis muscle, any of the muscles that connect the front walls of the chest with the bones of the upper arm and shoulder. There are two such muscles on each side of the sternum …

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 …

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 …

Nov 6, 2025 · It contains four muscles that exert a force on the upper limb: the pectoralis major, pectoralis minor, serratus anterior and subclavius. In this article, we shall look at the anatomy …

The pectoralis major is the most superficial muscle in the pectoral region. There are 2 heads of the pectoralis major, the clavicular and the sternocostal, which reference their area of origin.

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

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.

The pectoralis major is a large, fan-shaped, superficial muscle located on the anterior chest wall. It is one of the most powerful muscles of the upper body and plays a primary role in …

Jul 24, 2023 · 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 …