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Encyclopedia > Neurolemma

Neurolemma (spelled also neurolema, neurilemma and neurilema, and used interchangeably with epineurium) is the insulating myelin layer that surrounds an individual peripheral nerve fiber. The myelin is contributed by Schwann cells and the layer is sometimes referred to as the sheath of Schwann. The neurolemma is instrumental in regenerating axons that have been injured.

  Results from FactBites:
X. The Organs of the Senses and the Common Integument. 1e. Peripheral Terminations of Nerves of General Sensations. ... (1304 words)
Free nerve-endings occur chiefly in the epidermis and in the epithelium covering certain mucous membranes; they are well seen also in the stratified squamous epithelium of the cornea, and are also found in the root-sheaths and papillæ of the hairs, and around the bodies of the sudoriferous glands.
After a time the fiber loses its neurolemma, and consists only of an axis-cylinder, which can be seen, in preparations stained with chloride of gold, to be made up of fine varicose fibrillæ.
Finally, the axis-cylinder breaks up into its constituent fibrillæ which often present regular varicosities and anastomose with one another, and end in small knobs or disks between the epithelial cells.
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