Nerve membrane

Role of neuron protection and regeneration

The nerve membrane consists of a Glial cell —— Schwann cell (also known as Schwann cell 、 Schwann cell ）Part of and its periphery Basement membrane Composed of thin film, wrapped in Myelinated nerve fiber Of myelin sheath Externally or continuously wrapped in Unmyelinated nerve fiber In addition, it has the function of protection and regeneration.

Chinese name: Nerve membrane
Foreign name: neurilemma

Composition: The outermost membrane and its outer basement membrane of Schwann cells
Distribution: Outside of myelinated and unmyelinated nerve fibers
Role: Protection and regeneration

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Unmyelinated (left) and myelinated (right) nerve fiber membranes

The nerve membrane is wrapped in Myelinated nerve fiber Outside or continuously wrapped in the myelin sheath Unmyelinated nerve fiber Outside.

Among myelinated nerve fibers, myelin sheath and nerve membrane are one nerve cell The nerve membrane is Schwann cell contain cytoplasm and nucleus The myelin sheath is the membrane of Schwann cells repeatedly wrapped around axon Multiple layers formed around membrane structure 。 Schwann cells are wrapped outside the axon, so they are also called Nerve membrane cells （ neurilemma l cell）， It has a layer of bread Basement membrane 。 The outermost membrane of Schwann cells, together with the basement membrane, is often called neurilemma, which can be seen under light microscope.

stay Unmyelinated nerve fiber Several axons are trapped in the nerve membrane cells and wrapped by the nerve membrane cells, and the nerve membrane cells are continuously wrapped on the surface of the axons. Unmyelinated nerve fiber Langfei's knot 。

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The nerve membrane has protection neuron And regeneration. nerve fiber When damaged Schwann cell Under the condition of encapsulation, the neuron cell body can regenerate new axon 。

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