dysmyelination


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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.

dys·my·e·li·na·tion

(dis'mī-ĕ-li-nā'shŭn),
Improper laying down or breakdown of a myelin sheath of a nerve fiber, caused by abnormal myelin metabolism.

dysmyelination

/dys·my·elin·a·tion/ (dis-mi″ĕ-lin-a´shun) breakdown or defective formation of a myelin sheath, usually involving biochemical abnormalities.

dysmyelination

[dismi′ĕ-lina′shun]
breakdown or defective formation of a myelin sheath, usually involving biochemical abnormalities.

dys·my·e·li·na·tion

(dis'mī-ĕ-li-nā'shŭn)
Improper laying down or breakdown of a myelin sheath of a nerve fiber, caused by abnormal myelin metabolism.

dysmyelination

References in periodicals archive ?
The second paper, whose lead author is Nobuko Uchida, vice president of stem cell biology at StemCells, describes research that shows that when HuCNS-SC cells were transplanted into the shiverer mouse, a common model of severe central nervous system (CNS) dysmyelination, the cells fonned new, functional myelin in the mice.
Brain dysmyelination and recovery assessment by noninvasive in vivo diffusion tensor magnetic resonance imaging.
Dysmyelination of neurons leads to the sensory and motor deficiencies associated with multiple sclerosis and spinal cord injury.