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A total of nine flexor tendons (not the muscles themselves) pass through the carpal tunnel: 1  flexor digitorum profundus (four tendons) 2  flexor digitorum superficialis (four tendons)  flexor pollicis longus (one tendon)
Symptoms of carpal tunnel are localized to the area of the wrist and hand, and include pain, discomfort, weakness, numbness, or tingling of the area. It is not uncommon for these symptoms of pain, discomfort, and weakness to also radiate up the arm from the wrist.