Pectoralis Major Muscle Anatomy Origin Insertion Nerve Supply

Pectoralis Major Muscle Anatomy Origin Insertion Nerve Supply The pectoralis major has a broad origin, based on which it is divided into three parts: clavicular part, sternocostal part and abdominal part. all three parts converge laterally and insert onto the greater tubercle of humerus. the main function of this chest muscle as a whole is the adduction and internal rotation of the arm in the shoulder joint. 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 chest and breast. the paired muscle is often called the ‘pecs’ in combination with the smaller muscle pectoralis minor.

Pectoralis Major Origin Insertion Nerve Supply And Action Youtub 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. its origin lies anterior surface of the medial half of the clavicle, the anterior surface of the sternum, the first 7 costal cartilages, the sternal end of the sixth rib, and the aponeurosis. 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]. 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. The pectoralis major is a muscle of the anterior chest wall. it is a large fan shaped muscle, which is composed of a sternal head and a clavicular head. clavicular head originates from the anterior surface of the medial clavicle. sternocostal head originates from the anterior surface of the sternum, the superior six costal cartilages and the. Comprehensive anatomy of the pectoral region including origin, course, and distribution of the major vessels and their branches that supply drain it. muscle innervations from the brachial plexus, together with their sensory distribution to predict or localize the consequences of injury to these nerves along with an explanation on how to test their functional integrity clinically.