Internodal segment

Internodal segment

Infobox Anatomy
Latin = segmentum internodale
GraySubject = 183
GrayPage = 727

Caption = Diagram of longitudinal sections of medullated nerve fibers.

Caption2 = Medullated nerve fibers stained with silver nitrate.
System =
MeshName =
MeshNumber =
DorlandsPre = s_07
DorlandsSuf = 12727330
The portion of nerve fiber between two Nodes of Ranvier is called an internodal segment (or internode). The neurolemma or primitive sheath is not interrupted at the nodes, but passes over them as a continuous membrane.

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Look at other dictionaries:

  • internodal segment — the segment of a nerve fiber between two nodes of Ranvier; called also internode, internode of Ranvier, and interannular s …   Medical dictionary

  • internodal — Between two nodes; relating to an internode. * * * in·ter·no·dal .int ər nōd əl adj lying or extending between two nodes <a Schwann cell covers one internodal segment between two nodes of Ranvier> in·ter·node int ər .nōd n * * *… …   Medical dictionary

  • segment — 1. A section; a part of an organ or other structure delimited naturally, artificially, or by invagination from the remainder. SYN: segmentum [TA]. SEE ALSO: metamere. 2. A territory of an organ having independent function, supply, or drainage. 3 …   Medical dictionary

  • Ranvier crosses nodes segment (internode) tactile disks — Ran·vier crosses, nodes, segment (internode), tactile disks (rahn vyaґ) [Louis Antoine Ranvier, French pathologist, 1835–1922] see under cross, disk, and node, and see internodal segment under segment …   Medical dictionary

  • interannular segment — internodal s …   Medical dictionary

  • Ranvier segment — internodal s …   Medical dictionary

  • internode of Ranvier — internodal segment …   Medical dictionary

  • Myelin sheath gap — Drawing of a peripheral nerve axon (labeled axis cylinder ), showing a node of Ranvier along with other features …   Wikipedia

  • Nodes of Ranvier — are known as the gaps (about 1 micrometer in diameter) formed between myelin sheath cells along axons or nerve fibers. OverviewSeveral vertebrate axons are surrounded by a myelin sheath allowing rapid and efficient saltatory propagation of action …   Wikipedia

  • segmentum — SYN: segment (1). [L. segment] s. A1 arteriae cerebri anterioris precommunicating part of anterior cerebral artery. s. A2 arteriae cerebri anterioris postcommunicating part of anterior cerebral artery. s. anterius [TA] SYN: anterior segment. s.… …   Medical dictionary

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