Following an Attack, a 21-Year-Old Man Is Transported to the Emergency

Following an attack, a 21-year-old man is transported to the emergency room. He was trying to flee and turned aside just as his assailant came at him from behind with a knife. The patient had a 4-cm-wide penetrating wound with severe blood loss. He is taken to the surgery room after basic stabilization. An injury to a muscle that aids in internal rotation of the arm and is innervated by the thoracodorsal nerve is discovered during surgical investigation. Which of the muscles seen in the cadaveric specimen is most likely damaged in this patient?

A) A
B) B
C) C
D) D
E) E

Correct Answer:

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