myelinated

myelinated /my·eli·nat·ed/ (mi´ĕ-lĭ-nāt″ed) having a myelin sheath.

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my·e·li·nat·ed (m-l-ntd)

adj.

Having a myelin sheath.

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myelinated

[mī′əlinā′tid]

(of a nerve) having a myelin 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.

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myelinated

having a myelin sheath.

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Patient discussion about myelinated.

Q. What is Myelin?

A. Myelin is a phospholipid layer that surrounds only the axons of many neurons. The main role of a myelin layer (or sheath) is an increase in the speed at which impulses pass along the myelinated fiber. Demyelination is the act of demyelinating, or the loss of the myelin sheath insulating the nerves, and is the cause of some neurodegenerative autoimmune diseases, including multiple sclerosis, acute disseminated encephalomyelitis, transverse myelitis, Alexander's disease, chronic inflammatory demyelinating polyneuropathy, Guillain-Barré Syndrome and central pontine myelinosis. Here is a link to a website that tells more about it:
http://www.myelin.org/