An internodal segment (or internode) is the portion of a
nerve fiber
An axon (from Greek ἄξων ''áxōn'', axis), or nerve fiber (or nerve fibre: see spelling differences), is a long, slender projection of a nerve cell, or neuron, in vertebrates, that typically conducts electrical impulses known as action p ...
between two
Nodes of Ranvier
In neuroscience and anatomy, nodes of Ranvier ( ), also known as myelin-sheath gaps, occur along a myelinated axon where the axolemma is exposed to the extracellular space. Nodes of Ranvier are uninsulated and highly enriched in ion channels, a ...
. The
neurolemma or
primitive sheath is not interrupted at the nodes, but passes over them as a continuous membrane.
References
External links
Neurohistology
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