Rhomboid Major is innervated by which nerve?

Rhomboid Major is innervated by which nerve?

• A. Dorsal scapular nerve
• B. Long thoracic nerve
• C. Thoracodorsal nerve
• D. Subscapular nerve

Answer: (A)

The key idea is which nerve supplies the rhomboid muscles. The rhomboid major (with rhomboid minor) retracts the scapula, and its motor input comes from the dorsal scapular nerve. This nerve branches from the C5 root of the brachial plexus and often runs with levator scapulae before entering the rhomboids to provide their motor innervation. The other nerves have different targets: the long thoracic nerve goes to serratus anterior; the thoracodorsal nerve to latissimus dorsi; and the subscapular nerves to subscapularis (and teres major). So the dorsal scapular nerve is the correct innervation.

The key idea is which nerve supplies the rhomboid muscles. The rhomboid major (with rhomboid minor) retracts the scapula, and its motor input comes from the dorsal scapular nerve. This nerve branches from the C5 root of the brachial plexus and often runs with levator scapulae before entering the rhomboids to provide their motor innervation. The other nerves have different targets: the long thoracic nerve goes to serratus anterior; the thoracodorsal nerve to latissimus dorsi; and the subscapular nerves to subscapularis (and teres major). So the dorsal scapular nerve is the correct innervation.