NEURILEMMA Meaning and
Definition
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Neurilemma refers to the thin covering or sheath that surrounds axons, which are the long, threadlike extensions responsible for transmitting nerve impulses within the nervous system. Also known as the Schwann cell sheath, neurilemma is formed by specialized cells called Schwann cells, found in the peripheral nervous system (PNS).
The primary function of the neurilemma is to protect and maintain the integrity of the axons. It provides a layer of insulation that enables efficient conduction of nerve impulses. The neurilemma is essential for the regeneration and repair of damaged axons within the peripheral nerves. Schwann cells play a crucial role in this process by promoting the regrowth of axons and providing a pathway for their reconnection.
In addition to its protective function, the neurilemma also aids in the maintenance of the axon's metabolic needs. It plays a role in the exchange of nutrients, oxygen, and other necessary substances between the nerve fibers and the surrounding tissues.
Pathological conditions that affect the neurilemma can have significant consequences on nerve function. For example, damage to the neurilemma can lead to impaired nerve conduction or even complete nerve blockage. This can result in various neurological symptoms, such as numbness, muscle weakness, or loss of sensation in the affected area.
Overall, neurilemma plays a crucial role in the structural and functional support of axons in the peripheral nervous system and is vital for the proper functioning of the nervous system as a whole.
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Sheath of Schwann, a delicate hyaline membrane surrounding the medullary substance of a nerve fiber, or the axis-cylinder in a non-medullated nerve-fiber.
A practical medical dictionary. By Stedman, Thomas Lathrop. Published 1920.
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In anat., the delicate fibrous sheath of a nerve.
Etymological and pronouncing dictionary of the English language. By Stormonth, James, Phelp, P. H. Published 1874.
Common Misspellings for NEURILEMMA
- beurilemma
- meurilemma
- jeurilemma
- heurilemma
- nwurilemma
- nsurilemma
- ndurilemma
- nrurilemma
- n4urilemma
- n3urilemma
- neyrilemma
- nehrilemma
- nejrilemma
- neirilemma
- ne8rilemma
- ne7rilemma
- neueilemma
- neudilemma
- neufilemma
Etymology of NEURILEMMA
The word "neurilemma" is derived from two Greek roots:
1. "neuro" - meaning "nerve" or "nervous system".
2. "lemma" - meaning "husk" or "skin".
Therefore, "neurilemma" literally translates to "nerve husk" or "nerve skin". It refers to the protective sheath that surrounds peripheral nerves and is composed of Schwann cells.
Similar spelling words for NEURILEMMA
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