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WHAT: Tinel\'s sign. Tinel\'s Sign: a clinical test in which percussion of the median nerve at the volar aspect of the wrist produces a tingling sensation in the fingers supplied by the median nerve. WHY: The test helps in diagnosing those patients with carpal tunnel syndrome. HOW: The test is performed by lightly percussing the median nerve at the volar aspect of the wrist, just radial to the palmaris longus tendon. The test is considered positive if the patient experiences a tingling sensation in the thumb, index, middle or radial half of the ring finger or in the radial half of the palm. REFS: Phalen, GS: The carpal tunnel syndrome: seventeen years\' experience in diagnosis and treatment of 654 hands. J Bone Joint Surg 48A:211, 1966. DN19301-1.
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