left pectoralis minor
Muscular systemThoraxLeftFMA13376
Nomenclature
left pectoralis minor
musculus pectoralis minor (Latin)
muscolo piccolo pettorale sinistro (Italian)
Descriptionentry
Triangular muscle deep to pectoralis major, on the anterior chest wall.
Functionentry
Depresses and protracts the shoulder; elevates the ribs when the scapula is fixed.
Originentry
External surface of the third, fourth and fifth ribs.
Insertionentry
Coracoid process of the scapula.
Innervationentry
Medial pectoral nerve (C8-T1).
Blood supplyentry
Thoracoacromial artery.
Clinical notes
Landmark in thoracic outlet syndrome and in the relations of the brachial plexus.
Part of
Related structures
Model