A 53-Year-Old Man Is Evaluated for Right Hand Discomfort

A 53-year-old man is evaluated for right hand discomfort.  A month ago, he started to intermittently experience a "pins and needles" sensation in his right hand that is worse at night.  He has no neck pain or history of trauma to the right upper extremity.  The patient has smoked a pack of cigarettes daily for 20 years and has worked as an accountant for the past 30 years.  On physical examination, there is loss of sensation over the right fifth digit.  There is no swelling, redness, or warmth of the hand.  The patient is most likely to have weakness of which of the following movements?

A) Elbow extension
B) Shoulder abduction
C) Wrist abduction
D) Wrist adduction
E) Wrist extension

Correct Answer:

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