The Pectoralis Minor muscle is the smallest of the two pectoral (chest) muscles. It works together with Serratus anterior which protracts and rotates 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

Actions

  • Scapula protraction
  • Rotation of the scapula downwards

Innervation

  • Medial pectoral nerve

Daily uses

  • Pushing a door open

How can I stretch it?

How can I strengthen it?

Shoulder Girdle Muscles:

More Human Muscles: