sternocostal part of left pectoralis major
Muscular systemThoraxLeftFMA79980
Nomenclature
sternocostal part of left pectoralis major
pars sternocostalis musculi pectoralis majoris (Latin)
parte sternocostale del grande pettorale sinistra (Italian)
Descriptionentry
The broadest portion of pectoralis major, from the sternum and costal cartilages.
Functionentry
Adduction and medial rotation of the arm.
Originentry
Anterior surface of the sternum and the second to sixth costal cartilages.
Insertionentry
Crest of the greater tubercle of the humerus.
Innervationentry
Lateral and medial pectoral nerves (C5-T1).
Blood supplyentry
Thoracoacromial and intercostal arteries.
Part of
Related structures
Model