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carpal tunnel

the carpal tunnel is a narrow passageway in the wrist that is made of bones on three sides and a ligament (transverse carpal ligament) across the wrist where the palm and forearm meet.

inside the tunnel are:

  • tendons, which are strong and flexible (but not stretchable) bands of tissue that connect muscle to bone. the tendons are surrounded by membranes (synovial membranes called tendon sheaths).
  • the median nerve, which controls some movement in the thumb and gives sensation to the thumb, index finger, middle finger, and half of the ring finger.

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