A 25-year-old press-operator sustained a crush injury to his left hand and was referred by the emergency physician directly for electrodiagnostic testing. There is no fracture upon the initial CT-scan performed in the Emergency Department, but the patient reports reduced sensation in the thumb, and digits two and three. The pain is getting worse but he is able to "shake it out," on occasion. Which of the following findings would you expect on the EMG/NCS test that was performed the following day?

A 25-year-old press-operator sustained a crush injury to his left hand and was referred by the emergency physician directly for electrodiagnostic testing. There is no fracture upon the initial CT-scan performed in the Emergency Department, but the patient reports reduced sensation in the thumb, and digits two and three. The pain is getting worse but he is able to "shake it out," on occasion. Which of the following findings would you expect on the EMG/NCS test that was performed the following day?



A. Distal, generalized neuropathy
B. Median nerve involvement
C. Normal study
D. Radial nerve involvement
E. Ulnar nerve involvement


Answer: C


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Biomechanics

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