Extremities Exam 1 – Muscles Practice

Which nerve innervates the rhomboid major?

Dorsal scapular nerve Suprascapular nerve Axillary nerve Long thoracic nerve

Correct Answer:

Dorsal scapular nerve

Explanation:

Innervation of the rhomboid major comes from the dorsal scapular nerve, a branch of the C5 nerve root. This nerve travels to the deep surface of the rhomboid muscles and provides motor input that enables retraction and downward rotation of the scapula. The dorsal scapular nerve specifically targets the rhomboids (major and minor), which is why it’s the correct choice. The other nerves have different targets: the suprascapular nerve goes to the supraspinatus and infraspinatus, the axillary nerve to the deltoid and teres minor, and the long thoracic nerve to the serratus anterior.

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