All the following clinical signs are positive in CTS except which of the following (AIIMS Nov 2010)
a. Finkelstein's test is used for diagnosis of dequervain's tenosynovitis. Acute flexion of the wrist for about 60 seconds increases the paresthesias this is the phalen's sign.
b. The tinel sign may also be demonstrated in most patient by percussing the median nerve at the wrist.
c. The tourniquet test is-application of a blood pressure cuff on the upper arm sufficient to produce venous distension which may initiate the symptoms