sWhat is Carpal Tunnel Syndrome?

Carpal Tunnel Syndrome (CTS) refers to the compression of the median nerve at the wrist in a structure called the carpal tunnel. The median nerve carries sensation from the palmar surface of the thumb and fingers (except the little finger). It also controls the muscles that move the thumb. The carpal tunnel is formed by wrist bones and a ligament called flexor retinaculum that runs across the wrist. This “tunnel” is a narrow passageway for the median nerve as well as the many tendons that control finger movements. Swelling or thickening of any of the structures in or around the carpal tunnel may compress the median nerve, leading to pain, numbness and weakness of the hand and thumb.