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Damage to this nerve can result in lateral scapular winging.
Scenario 1: This is highly variable and poorly defined in up to 40% of the population.
Clinical Rationale:
Spinal accessory nerve.
Scenario 2: This is the primary restraint to anterior/inferior translation of the head with the
Clinical Rationale:
Long thoracic nerve. Injury to the spinal accessory nerve which supplies trapezius can result in shoulder depression with scapular lateral translation and the inferior angle rotating laterally because of the unopposed action of serratus anterior. There are four supraclavicular branches of the brachial plexus: long thoracic nerve, dorsal scapular nerve, suprascapular nerve, nerve to subclavius. In elbow arthroscopy the radial nerve is only 4 mm from the anterolateral portal, while the median nerve is 11 mm away from the anteromedial portal. The ulnar nerve is only at risk on the medial side of the elbow.
