Thoracodorsal nerve

The thoracodorsal nerve (middle or long subscapular nerve), a branch of the posterior cord of the brachial plexus, derives its fibers from the sixth, seventh, and eighth cervical nerves; 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.