Neural Entrapment Carpal Tunnel Syndrome The carpal tunnel is formed posteriorly by the carpal bones and extrinsic ligaments, and anteriorly by the flexor retinaculum or transverse carpal ligament, a thin fibrous band which inserts into the scaphoid and trapezium on…
Tendon Disease Extensor Carpi Ulnaris Instability The extensor carpi ulnaris (ECU) tendon passes through the sixth extensor compartment, a fibroosseous tunnel over the distal 2 cm of the ulna. Key Point The ECU subsheath is a retinaculum, separate from the extensor…
Tendon Disease De Quervain's Disease De Quervain's disease is an overuse tenosynovitis of the abductor pollicis longus and extensor pollicis brevis tendons in the first extensor compartment (EC). Low-grade chronic microtrauma is thought to underlie the condition, leading to localized…