Pectoralis Minor
Origin: Anterior surfaces of 3rd, 4th, and 5th ribs near the costal cartilages
Insertion: Coracoid process of the scapula.
Action: Depresses scapula and rotates scapula downward. Important anterior shoulder stabilizer.
Reversed origin-insertion action: With a fixed scapula, pectoralis minor helps rib elevation during forced inspiration.
Synergists: Â Pectoralis major, serratus anterior
