pectoralis minor muscle

(redirected from smaller pectoral muscle)
Also found in: Dictionary, Thesaurus.

pec·to·ra·lis mi·nor mus·cle

(pek'tōr-āl'is mī'nŏr mŭs'ĕl)
Deep thoracoappendicular muscle of chest; origin, third to fifth ribs at costochondral articulations; insertion, tip of coracoid process of scapula; action, draws down scapula or raises ribs; nerve supply, medial pectoral.
Synonym(s): musculus pectoralis minor, smaller pectoral muscle.

pectoralis minor muscle

Chest wall muscle. Origin: Anterior medial surface of ribs 3-5. Insertion: coracoid process of scapula. Nerve: lateral and medial pectoral (C6-C8). Action: pulls shoulder forward and down, elevates rib cage.
See also: muscle