Pectoralis Minor

Origin 3rd to 5th ribs near their costal cartilages
Insertion Medial border and superior surface of coracoid process of scapula
Action Stabilizes scapula by drawing it inferiorly and anteriorly against thoracic wall
Innervation Medial pectoral nerves; clavicular head (C8 and T1) (C8, T1)
Arterial Supply Pectoral branch of the thoracoacromial trunk

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Muscle Atlas of the Extremities