The pulp of the index finger has decreased sensation. Which of the following is affected?
Mrs. Fletcher complains of numbness of her right hand. On examination, sensation of the volar aspect of the web of the thumb and index finger and the pulp of the middle finger are normal.
A) Median nerve
B) Ulnar nerve
C) Radial nerve
A) Median nerve
The pulp of the index finger is innervated by the median nerve. A decrease in sensation at this area would support a diagnosis of carpal tunnel syndrome. The pulp of the fifth finger is supplied by the ulnar nerve, and the dorsal web space of the thumb and index finger is supplied by the radial nerve.
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