Origin

3rd to 5th ribs, near their costal cartilages

Insertion

Medial border and superior surface of the coracoid process of the scapula

Action(s)

It stabilizes the scapula by drawing it inferiorly and anteriorly against the thoracic wall.

Nerve Supply

Medial pectoral nerve (C8, T1)

Arterial Supply

Pectoral branch of the thoracoacromial trunk

Physical Exam

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Clinical Importance

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Disease States

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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.

Figures

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Credits:

From Wikipedia:
Pectoralis minor

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