Dorsal scapular nerve

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The dorsal scapular nerve is a branch from the C5 root of the brachial plexus and supplies the rhomboid muscles.

Gross anatomy

Origin

Posterior aspect of the C5 root of the brachial plexus.

Course

It courses through scalenus medius then accompanies the dorsal scapular vessels inferiorly, deep to levator scapulae where it lies on serratus posterior superior.

Supply

It supplies both rhomboids on their deep surfaces and may also supply levator scapulae via a separate branch.