Anatomy
Origin:
Anterior surface of the 3rd, 4th and 5th ribs near their costal cartilages.
Insertion:
Medial border and superior surface of coracoid process of scapula.
Key Relations:
The medial pectoral nerve pierces the muscle and the clavipectoral fascia.
Functions
-Stabilises the scapula by drawing it inferiorly and anteriorly against the thoracic wall.
-Protracts the scapula e.g. as in pushing open a door..
Supply
Nerve Supply:
Medial pectoral nerve (C6, C7, C8, T1).
Blood Supply:
Pectoral and deltoid branches of thoracoacromial trunk.
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