pectoralis minor

pectoralis minor

n.

A muscle with origin from the third to the fifth ribs, with insertion into the coracoid process of the scapula, with nerve supply from the anterior thoracic nerve, and whose action lowers the scapula or raises the ribs.

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pectoralis minor,

a thin triangular muscle of the upper chest wall beneath the pectoralis major. The base arises from the third, fourth, and fifth ribs on their upper outer surfaces. It inserts as a flat tendon into the coracoid process of the scapula. It functions to rotate the scapula, to draw it down and forward, and to raise the third, the fourth, and fifth ribs in forced inspiration. Compare pectoralis major, subclavius.