Tendon Sheath of Extensor Carpi Ulnaris
Vagina tendinis extensoris carpi ulnaris
Read moreAnatomical Relations
The tendon sheath of the extensor carpi ulnaris muscle runs distally between the styloid process of the ulna and the ulnar head. It passes deep to the extensor retinaculum in its own compartment. It continues as far as the proximal base of the fifth metacarpal.
Related parts of the anatomy
Structure
The tendon sheath of the extensor carpi ulnaris muscle has an outer fibrous component and an inner double layered sheath of synovial membrane that is akin to a longitudinal bursa. The synovial layer is composed of an inner visceral layer and an outer parietal layer. The synovium produces a thin layer of lubricating fluid between the visceral and parietal layers which surround the tendons.
Function
The tendon sheath of the extensor carpi ulnaris muscle provides a well-lubricated, smooth surface that reduces friction during movements of the tendons.
List of Clinical Correlates
—Tendovaginitis
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Tendon Sheath
Tenosynovectomy refers to the excision of thickened tendon sheath and other tissue surrounding a tendon, commonly seen in infection, chemical irritation, and rheumatoid arthritis (synovectomy).
