Carpal tunnel and structures at the wrist The carpal tunnel is formed anteriorly at the wrist by a deep arch formed by the carpal bones and the flexor retinaculum.

Carpal arch The base of the carpal arch is formed medially by the pisiform and the hook of the hamate and laterally by the tubercles of the scaphoid and trapezium.

Flexor retinaculum flexor retinaculum is a thick connective tissue ligament that bridges the space between the medial and lateral sides of the base of the arch and converts the carpal arch into the carpal tunnel.

Structure and relations Four tendons of the flexor digitorum profundus Four tendons of the flexor digitorum superficialis One tendon of the flexor pollicis longus Median nerve

Carpal tunnel syndrome Carpal tunnel syndrome is an entrapment syndrome caused by pressure on the median nerve within the carpal tunnel.

Carpal Tunnel syndrome Common in computer professionals. Due to constant dorsiflexion of wrist while typing the keyboard