Summary
Origins
- Anterior surfaces of the 3rd to 5th ribs near their costal cartilages.
Insertions
- Coracoid process of the 🦴 scapula.
Actions
- Scapular protraction (pulls 🦴 scapula forward and downward).
- Scapular depression.
- Stabilizes 🦴 scapula against thoracic wall.