Article · Wikipedia archive · Last revised Jun 9, 2026

Internodal segment

In neuroscience, an internodal segment is the portion of a nerve fiber between two nodes of Ranvier. The neurilemma or primitive sheath is not interrupted at the nodes, but passes over them as a continuous membrane.

Last revised
Jun 9, 2026
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Internodal segment
Diagram of longitudinal sections of medullated nerve fibers.
Medullated nerve fibers stained with silver nitrate.
Details
Part ofAxon of nerve fiber
SystemNervous system
Identifiers
Latinsegmentum internodale
THH2.00.06.2.03028
Anatomical terms of microanatomy

In neuroscience, an internodal segment (or internode) is the portion of a nerve fiber between two nodes of Ranvier. The neurilemma or primitive sheath is not interrupted at the nodes, but passes over them as a continuous membrane.

References

References

This article incorporates text in the public domain from page 727 of the 20th edition of Gray's Anatomy (1918)

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