- Retract scapula and rotate it to depress glenoid cavity; fix scapula to thoracic wall.
- Nuchal ligament and spinous processes of C7 and T1 vertebrae.
- Medial border of scapula from level of spine to inferior angle.
- Dorsal scapular nerve ( C4 and C5).
Arterial Supply :
- Dorsal scapular artery.