node of Ranvier

(redirected from Ranvier node)
Also found in: Thesaurus, Medical, Encyclopedia.

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?
However in some patients with antiganglioside antibodies a physiologic conduction block at the axolemma of the Ranvier node has been described.
Key words: Ranvier node, FitzHugh-Nagumo circuit, Hopf bifurcation, excitability, bistability, birhythmicity.