Plan of brachial plexus. (Label for thoracodorsal nerve at bottom center.)
|From||posterior cord (C6-C8)|
|Innervates||Latissimus dorsi muscle|
|Anatomical terms of neuroanatomy|
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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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- Dissection Video of Superficial Back showing the Thoracodorsal Nerve
- Anatomy figure: 05:03-10 at Human Anatomy Online, SUNY Downstate Medical Center - "The major subdivisions and terminal nerves of the brachial plexus."
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