synovial tendon sheath(redirected from theca tendinis)
syn·o·vi·al ten·don sheath[TA]
a sheath of synovial membrane enveloping certain of the tendons; it contains a small amount of synovial fluid.
Synonym(s): vagina synovialis tendinis [TA], mucous sheath of tendon, theca tendinis, vagina mucosa tendinis, vaginal synovial membrane
Farlex Partner Medical Dictionary © Farlex 2012
synovial tendon sheath
A double-walled tubelike bursa that encloses a tendon. It consists of an inner visceral layer lying on and adhering to a tendon and an outer parietal layer; the two layers are separated by a space filled with synovial fluid. This sheath is found esp. in the hands and feet where tendons are confined to osteofibrous canals or pass over bony surfaces.Synonym: synovial sheath
Medical Dictionary, © 2009 Farlex and Partners
Synovial tendon sheath
Where the tendons cross joints, they are sheathed in thin membranes known as synovium, which provide lubrication to decrease friction.
Mentioned in: Trigger Finger
Gale Encyclopedia of Medicine. Copyright 2008 The Gale Group, Inc. All rights reserved.