Origin | 3rd to 5th ribs, near their costal cartilages |
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Insertion | Medial border and superior surface of the coracoid process of the scapula |
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Action(s) | It stabilizes the scapula by drawing it inferiorly and anteriorly against the thoracic wall. |
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Nerve Supply | Medial pectoral nerve (C8, T1) |
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Arterial Supply | Pectoral branch of the thoracoacromial trunk |
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Physical Exam | Enter physical examination maneuvers for muscle |
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Clinical Importance | Enter clinical importance of muscle |
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Disease States | Enter links to pages where muscle involved |
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Discussion | Origin from second, third and fourth or fifth ribs. The tendon of insertion may extend over the coracoid process to the greater tubercle. May be split into several parts. Absence rare. |
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