State the origin and insertion of rhomboid major and its main action on the scapula.

State the origin and insertion of rhomboid major and its main action on the scapula.

• A. Origin: spinous processes T2-T5. Insertion: medial border of the scapula from the spine to the inferior angle. Action: retracts the scapula and rotates it downward.
• B. Origin: spinous processes C1-T1. Insertion: medial border of the scapula at the level of the spine. Action: retracts and downwardly rotates the scapula.
• C. Origin: spinous processes T1-T4. Insertion: superior angle of scapula; Action: elevates scapula.
• D. Origin: transverse processes C2-C5. Insertion: lateral border of scapula; Action: protracts scapula.

Answer: (A)