Shading indicates
area that CTS affects
Ulnar
Artery
Median Nerve
Transverse
Carpal Ligament
What is Carpal Tunnel Syndrome?
Carpal Tunnel Syndrome (CTS) is a common condition that causes pain, numbness, and tingling in the hand and arm. The condition occurs when one of the major nerves in the hand—the median nerve—is compressed as it travels through the wrist. The median nerve controls movement in the thumb and feeling in the thumb and first three fingers. It runs down the arm and forearm, passes through the carpal tunnel at the wrist, and goes into the hand.