Neurilemma: Difference between revisions
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3. [[Schwann cell]]<br /> |
3. [[Schwann cell]]<br /> |
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4. [[Myelin sheath]]<br /> |
4. [[Myelin sheath]]<br /> |
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5. ''' |
5. '''Neurolemma''' |
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| Location = [[Schwann cell]] |
| Location = [[Schwann cell]] |
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| System = [[Peripheral nervous system]] |
| System = [[Peripheral nervous system]] |
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'''Neurolemma''' (also known as '''neurolemma''', '''sheath of Schwann''', or '''Schwann's sheath''')<ref name="Dorlands">{{cite book|last1=Albert|first1=Daniel|title=Dorland's illustrated medical dictionary.|date=2012|publisher=Saunders/Elsevier|location=Philadelphia, PA|isbn=9781416062578|pages=1262–1263|edition= 32nd}}</ref> is the outermost [[cell nucleus|nucleated]] [[cytoplasm]]ic layer of [[Schwann cell]]s (also called neurilemmocytes) that surrounds the [[axon]] of the [[neuron]]. It forms the outermost layer of the [[nerve fiber]] in the [[peripheral nervous system]].<ref name="Marieb" >{{cite book |author1=Elaine N. Marieb |author2=Katja Hoehn | title = Human Anatomy & Physiology (7th Ed.) |url=https://archive.org/details/humananatomyphys00mari_4 |url-access=registration | publisher = Pearson | pages = [https://archive.org/details/humananatomyphys00mari_4/page/394 394–5] | year = 2007 | isbn = 0-8053-5909-5}}</ref> |
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The |
The neurolemma is underlain by the [[myelin |myelin sheath]] (referred to as the medullary sheath in the included illustrations). In the [[central nervous system]], axons are myelinated by [[oligodendrocytes]], thus lack neurolemma. The myelin sheaths of Oligodendrocytes do not have neurolemma because excess [[cytoplasm]] is directed centrally toward the oligodendrocyte cell body. |
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Neurolemma serves a protective function for peripheral nerve fibers. Damaged nerve fibers may regenerate if the [[Soma (biology)|cell body]] is not damaged and the neurolemma remains intact. The neurolemma forms a regeneration tube through which the growing axon re-establishes its original connection. |
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A [[ |
A [[neurolemoma]] is a tumor of the neurilemma.<ref name=Dorlands/> |
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==References== |
==References== |
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Revision as of 09:25, 28 April 2020
| Neurolemma | |
|---|---|
 Diagram of longitudinal sections of medullated nerve fibers. | |
.svg) Cross section of an axon. 1. Axon | |
| Details | |
| System | Peripheral nervous system |
| Standort | Schwann cell |
| Identifiers | |
| MeSH | D009441 |
| TH | H2.00.06.1.00002 |
| Anatomical terms of microanatomy | |
Neurolemma (also known as neurolemma, sheath of Schwann, or Schwann's sheath)[1] is the outermost nucleated cytoplasmic layer of Schwann cells (also called neurilemmocytes) that surrounds the axon of the neuron. It forms the outermost layer of the nerve fiber in the peripheral nervous system.[2]
The neurolemma is underlain by the myelin sheath (referred to as the medullary sheath in the included illustrations). In the central nervous system, axons are myelinated by oligodendrocytes, thus lack neurolemma. The myelin sheaths of Oligodendrocytes do not have neurolemma because excess cytoplasm is directed centrally toward the oligodendrocyte cell body.
Neurolemma serves a protective function for peripheral nerve fibers. Damaged nerve fibers may regenerate if the cell body is not damaged and the neurolemma remains intact. The neurolemma forms a regeneration tube through which the growing axon re-establishes its original connection.
A neurolemoma is a tumor of the neurilemma.[1]
References
- ^ a b Albert, Daniel (2012). Dorland's illustrated medical dictionary (32nd ed.). Philadelphia, PA: Saunders/Elsevier. pp. 1262–1263. ISBN 9781416062578.
- ^ Elaine N. Marieb; Katja Hoehn (2007). Human Anatomy & Physiology (7th Ed.). Pearson. pp. 394–5. ISBN 0-8053-5909-5.
External links
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