Tendon Sheath of Extensor Digiti Minimi Manus
Vagina tendinis extensoris digiti minimi manus
Read moreAnatomical Relations
The tendon sheath of the extensor digiti minimi manus muscle passes deep to the extensor retinaculum within its own compartment at the junction between radius and ulna and continues as far as the proximal one third of the fifth metacarpal. Here the extensor digiti minimi tendon emerges and forms the extensor expansion of the fifth digit.
Related parts of the anatomy
Structure
The tendon sheath of the extensor digiti minimi 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 digiti minimi manus 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).
