Thoracodorsal nerve

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Nerve: Thoracodorsal nerve
Gray807.png
Plan of brachial plexus. (Label for thoracodorsal nerve at bottom center.)
Latissimus dorsi.png
Latissimus dorsi
Latin nervus thoracodorsalis
Gray's p.934
Innervates Latissimus dorsi muscle
From posterior cord (C6-C8)

The thoracodorsal nerve is a nerve present in humans and other animals, also known as the middle subscapular nerve or the long subscapular nerve. It supplies the latissimus dorsi muscle.

It arises from the brachial plexus. It derives its fibers from the sixth, seventh, and eighth cervical nerves. It is derived from their ventral rami, in spite of the fact that the latissimus dorsi is found in the back. The thoracodorsal nerve is a branch of the posterior cord of the brachial plexus, and is made up of fibres from the posterior divisions of all three trunks of the brachial plexus.

It follows the course of the subscapular artery, along the posterior wall of the axilla to the Latissimus dorsi, in which it may be traced as far as the lower border of the muscle. It supplies latissimus dorsi on its deep surface.

The latissimus dorsi is occasionally used for transplantation, and for augmentation of systole in cardiac failure. In these cases, the nerve supply is preserved.

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This article incorporates text from a public domain edition of Gray's Anatomy.