node of Ranvier

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node of Ran·vier

 (rän′vyā, rän-vyā′, räN-)
n. pl. nodes of Ranvier
A constriction in the myelin sheath, occurring at varying intervals along the length of a nerve fiber.

[After Louis Antoine Ranvier (1835-1922), French histologist.]

node of Ranvier

(Anatomy) any of the gaps that occur at regular intervals along the length of the sheath of a myelinated nerve fibre, at which the axon is exposed
[C19: named after Louis-Antoine Ranvier (1835–1922), French histologist]

node′ of Ran•vier′

(rɑnˈvyeɪ, ˈrɑn vyeɪ)

a gap occurring at regular intervals between segments of myelin sheath along a nerve axon.
[after Louis-Antoine Ranvier (1835–1922), French histologist]
References in periodicals archive ?
Does white matter plasticity solely reflect changes of myelin thickness, or are there also activity-dependent alterations of Ranvier node Na+ channel density, internode length, or axon diameter at the nodes or internodes?
For the white matter, the information propagation speed is increased and the axonal energy cost is reduced by oligodendrocytes wrapping myelin around axons, thus decreasing their capacitance and decreasing the Na+ influx needed at Ranvier nodes to produce an action potential.
However in some patients with antiganglioside antibodies a physiologic conduction block at the axolemma of the Ranvier node has been described.