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Median nerve dysfunction
During a physical examination, the doctor may identify numbness in the palm, thumb, index finger, middle finger, and thumb side of the ring finger. Hand grip may be weak.
Tapping over the median nerve at the wrist may cause pain to shoot from the wrist to the hand. This is called the Tinel's sign. Bending the wrist forward all the way for 60 seconds will usually result in numbness, tingling, or weakness. This is called the Phalen's test.
Electromyography and nerve conduction velocity will show decreased conduction across the wrist. Wrist x-rays should be done to rule other problems (such as wrist arthritis).
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Piazzini DB, Aprile I, Ferrara PE, et al. A systematic review of conservative treatment of carpal tunnel syndrome. Clin Rehabil. 2007;21(4):299-314.