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Carpal tunnel syndrome -

The carpal tunnel is composed of inelastic bone and ligament. Structures passing through the tunnel are the long digital tendons, synovial tendon sheaths, and the median nerve (note that the ulnar nerve and artery do not pass through the tunnel). In carpal tunnel syndrome, inflammation of the synovial tendon sheaths increases the pressure within the inelastic tunnel, thereby compressing the median nerve. The sensory symptoms of carpal tunnel syndrome include tingling, and later numbness, over the skin of the radial 2 1/2 digits. Motor symptoms include weakness of the thenar muscles resulting in difficulty opposing the thumb with other fingers.
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