Name
Pronunciation
(pek-to-RA-lis)
Origin/Proximal Attachment
Outer surface of ribs 2-5
Insertion/Distal Attachment
Medial aspect of coracoid process of the scapula
Action/Relevance
Depresses the scapula
Downwardly rotates the scapula
Assists to protract the scapula from a retracted position
Stabilizes the scapula
Innervation
Pectoral nerve – medial (C8-T1)
Notes
Pectoralis minor is a triangular-shaped muscle that lies deep to pectoralis major on each side of the thorax. It forms part of the anterior wall of the axilla. Anatomically, it provides a lanmark to deeper structures, notably the axillary artery and cords of the brachial plexus.