tendon sheath


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sheath

 [shēth]
a tubular case or envelope.
arachnoid sheath the delicate membrane between the pial sheath and the dural sheath of the optic nerve.
carotid sheath a portion of the cervical fascia enclosing the carotid artery, internal jugular vein, vagus nerve, and sympathetic nerves supplying the head.
connective tissue sheath of Key and Retzius endoneurium.
crural sheath femoral sheath.
dural sheath the external investment of the optic nerve.
femoral sheath the fascial sheath of the femoral vessels.
Henle's sheath endoneurium.
lamellar sheath the perineurium.
medullary sheath myelin sheath.
myelin sheath (nerve sheath) the sheath surrounding the axon of myelinated nerve cells, consisting of concentric layers of myelin formed in the peripheral nervous system by the plasma membrane of Schwann cells, and in the central nervous system by the plasma membrane of oligodendrocytes. It is interrupted at intervals along the length of the axon by gaps known as nodes of Ranvier. Myelin is an electrical insulator that serves to speed the conduction of nerve impulses (see saltatory conduction).
pial sheath the innermost of the three sheaths of the optic nerve.
root sheath the epidermic layer of a hair follicle.
sheath of Schwann neurilemma.
synovial sheath synovial membrane lining the cavity of a bone through which a tendon moves.
tendon sheath a lubricated fibrous or synovial layer of tissue in which the tendon is housed and through which it moves.

tendon sheath

A dense fibrous sheath that confines a tendon to an osseous groove, converting it into an osteofibrous canal. It is found principally in the wrist and ankle.
See: synovial sheath
See also: sheath

Tendon sheath

A membrane covering a tendon.
Mentioned in: Trigger Finger
References in periodicals archive ?
A ray pattern usually manifests as isolated tenosynovitis, especially of the flexor tendon sheaths, with associated soft tissue edema (dactylitis or "sausage digit"), which can be readily identified on MRI.
Vaughan, "Radiographic anatomy of tendon sheaths and bursae in the horse," Equine Veterinary Journal, vol.
(8) The lesions arising from tendon sheaths most commonly affect the feet and hands.
The exclusion criteria were a history of shoulder joint surgery, fracture of the shoulder joint, recent local injection into the biceps tendon sheath, and calcification, tear, or rupture of the biceps tendon as detected by US.
According to his observations, this greater release would be achieved because of the close proximity of the surgical region to the insertion of the DDFT on the distal phalanx and unrestricted movement within the deep flexor tendon sheath. In contrast, separation after mid-metacarpal tenotomy would be restricted by peritenon attachment to the subcutaneous tissue (HUNT, 2003; PARKS & O'GRADY, 2003).
Fibroma of tendon sheath is a solitary, slow-growing, subcutaneous tumor with a predilection for the fingers, hands, and wrists of middle-aged adults.
Animals of control group showed complete adherence with tendon and tendon sheath and was highly vascular.
In another prospective, uncontrolled trial, 107 patients with flexor tenosynovitis were injected with 1 cc of betamethasone, 0.5 cc of 1% lidocaine, and 0.5 cc of radio opaque dye.3 Some patients got their injections in the tendon sheath at the A1 pulley site, others got their injections in the subcutaneous tissue surrounding the pulley, and a third group got injections in both sites.
It is caused by fluid from a joint or tendon sheath swelling into the surrounding areas.
Axial T1-weighted MR images showed a low-intensity mass in the peroneal tendon sheath, which seemed to compress both the peroneal brevis and longus tendons (Figure 3).
In OMS patients [Figure 1]b, the most important pathology change is the loosen of IT tendon sheath.[sup][3] After that, the OH becomes short and fibrosis because of the disuse atrophy.
A sharp dissection was carried through the skin, subcutaneous tissues, and tendon sheath, and the tendo Achilles is exposed.