A 29-year-old man comes in with a stab wound, cannot raise his arm above horizontal, and exhibits a condition known as “winged scapula.” Which of the following structures of the brachial plexus would most likely be damaged?

Correct Answer: Roots
Description: Winged scapula is caused by paralysis of the serratus anterior muscle that results from damage to the long thoracic nerve, which arises from the roots of the brachial plexus (C5-C7)
Category: Anatomy
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