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
- 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
