ECU subsheath connected the ulnar styloid process and superficial ligamentous fibers of the dorsal radioulnar ligament. So, The subsheath of the ECU tendon maintains the stability of the dorsal aspect of the TFCC it is necessary to learn about the ECU subsheath. The extensor retinaculum is an important and complex structure, preventing extensor tendons bowstringing. The extensor retinaculum cour..
