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", …

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 (breastbone) in …

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 …

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 …

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.

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 of the …

Dec 24, 2023 · What is the function of the pectoralis in the muscular system? The pectoralis major contracts to pull on the humerus to produce lateral, vertical, or rotational motion, which is mostly …

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.

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 anterior wall of the …

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