The pectoralis major muscle
is the most extensive muscle of the chest. The pectoralis major muscle covers the clavicle, sternum
, costal cartilages, and rectus muscle. The pectoralis major muscle, which is wide, big, and powerful, consists of three muscle bundles. The thoraco-acromial and lateral thoracic arteries
pass through the pectoralis muscle. It enables the extension of the arm
, the internal rotation of the humerus
, and the increase of thoracic volume.
Original article published by
. Translated by christelle.b
Latest update on August 20, 2014 at 05:45 AM by christelle.b.