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

Actions

• Scapula protraction
  
  
• Rotation of the scapula downwards

Innervation

• Medial pectoral nerve

Daily uses

• Pushing a door open

Example strengthening exercises

• Pec fly using a resistance band
  
  
• Chest Press using a resistance band

Example stretches

• Chest stretch
  
  
• Chest stretch with a partner
  

Related injuries

• Pectoral strain

Related muscles

• Pectoralis major