The rhomboid major is an extrinsic muscle of the shoulder. It is located deep to the trapezius, and inferior to the rhomboid minor.
- Attachments: Originates from the spinous processes of T2-T5 vertebrae. Attaches to the medial border of the scapula, between the scapula spine and inferior angle.
- Actions: Retracts and rotates the scapula.
- Innervation: Dorsal scapular nerve.
- Blood Supply: Dorsal scapular artery