A 25-Year-Old Man Is Evaluated in the Emergency Department After

A 25-year-old man is evaluated in the emergency department after he had a motor vehicle collision. A metallic bar is found embedded in his left arm. His vital signs are normal. According to the physical examination, the proximal forearm has been stabbed with a metallic bar. During the surgical repair, a nerve passing between the flexor digitorum profundus and superficialis is found transected. Which of the following actions would be affected?

A) Adduction of the third and fourth digits
B) Adduction of the thumb
C) Extension of the metacarpophalangeal joints
D) Extension of the wrist
E) Opposition to the thumb
F) Supination of the forearm

Correct Answer:

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