![]() ![]() ![]() Sometimes, thickening from the lining of irritated tendons or other swelling narrows the tunnel and compresses the median nerve. It also controls some small muscles at the base of the thumb. The median nerve provides feeling to the thumb, index, and middle finger, and part of the ring finger (but not the little finger). The median nerve and the tendons that bend the fingers pass through the carpal tunnel-a narrow, rigid passageway of ligament and bones at the base of the hand. You might wake up and feel you need to “shake out” your hand or wrist. You may feel numbness, weakness, pain in your hand and wrist, and your fingers may become swollen and useless. Carpal tunnel syndrome (CTS) is a common neurological disorder that occurs when the median nerve, which runs from your forearm into the palm of the hand, becomes pressed or squeezed at the wrist. ![]()
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