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Diagram of longitudinal sections of medullated nerve fibers.
Latin segmentum internodale
subject #183 727
Medullated nerve fibers stained with silver nitrate.
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.
External links Edit This article was originally based on an entry from a
public domain edition of Gray's Anatomy. As such, some of the information contained herein may be outdated. Please edit the article if this is the case, and feel free to remove this notice when it is no longer relevant.
Histology: nervous tissue
Neurons ( gray matter)
soma, axon ( axon hillock, axoplasm, axolemma, neurofibril/neurofilament), dendrite ( Nissl body, dendritic spine, apical dendrite, basal dendrite) types ( bipolar, pseudounipolar, multipolar, pyramidal, Purkinje, granule)
Afferent nerve/ Sensory nerve/ Sensory neuron
GSA, GVA, SSA, SVA, fibers ( Ia, Ib or Golgi, II or Aβ, III or Aδ or fast pain, IV or C or slow pain)
Efferent nerve/ Motor nerve/ Motor neuron
GSE, GVE, SVE, Upper motor neuron, Lower motor neuron ( α motorneuron, γ motorneuron)
neuropil, synaptic vesicle, neuromuscular junction, electrical synapse - Interneuron ( Renshaw)
Free nerve ending, Meissner's corpuscle, Merkel nerve ending, Muscle spindle, Pacinian corpuscle, Ruffini ending, Olfactory receptor neuron, Photoreceptor cell, Hair cell, Taste bud
astrocyte, oligodendrocyte, ependymal cells, microglia, radial glia
Myelination ( white matter)
Schwann cell, oligodendrocyte, nodes of Ranvier, internode, Schmidt-Lanterman incisures, neurolemma
Related connective tissues
epineurium, perineurium, endoneurium, nerve fascicle, meninges