Pectoralis Minor

The Pectoralis Minor muscle is the smallest of the two pectoral (chest) muscles. It works together with Serratus anterior which protracts and rotates the scapula upwards. When the two work together, pure protraction (without rotation) is produced.

Origin

  • Outer surface of ribs 3-5 Insertion
  • Coracoid process of the scapula

Action 

  • Scapula protraction
  • Rotation of the scapula downwards

Innervation 

  • Medial pectoral nerve

Daily uses

  • Pushing a door open

Example strengthening exercises

Example stretches

Related injuries

Related muscles