A small bundle of nerve fibers, enclosed by the perineurium, is called a fasciculus; if the nerve is of small size, it may consist only of a single fasciculus; but if large, the fasciculi are collected together into larger bundles or funiculi, which are bound together in a common membranous investment.
Examples include:
-
- Anterior funiculus of the spinal cord
- Lateral funiculus of the spinal cord
- Posterior funiculus of the spinal cord
- Funiculus solitarius of the medulla
- Funiculus separans
This article incorporates text from a public domain edition of Gray's Anatomy.
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Histology: nervous tissue (TA A14, GA 9.849, TH H2.00.06, H3.11)
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| CNS |
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General
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Grey matter · White matter (Projection fibers · Association fiber · Commissural fiber · Lemniscus · Funiculus · Fasciculus · Decussation · Commissure) · meninges
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Neuroglia
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Myelination: Oligodendrocyte
Astrocyte (Radial glial cell) · Ependymal cells (Tanycyte) · Microglia
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Other
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Pyramidal · Purkinje · Granule
Neuropil
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| PNS |
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General
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Posterior (Root, Ganglion, Ramus) · Anterior (Root, Ramus) · rami communicantes (Gray, White) · Autonomic ganglion (Preganglionic nerve fibers · Postganglionic nerve fibers)
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Connective tissues
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epineurium · perineurium · endoneurium · nerve fascicle
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Neuroglia
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Myelination: Schwann cell (Neurolemma, Myelin incisure, Myelin sheath gap, Internodal segment)
Satellite glial cell
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Neurons/
nerve fibers |
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Parts
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Perikaryon (Axon hillock)
Axon (Axon terminals, Axoplasm, Axolemma, Neurofibril/neurofilament)
Dendrite (Nissl body, Dendritic spine, Apical dendrite/Basal dendrite)
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Types
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Bipolar · Unipolar · Pseudounipolar · Multipolar · Interneuron (Renshaw)
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Afferent nerve fiber/
Sensory nerve
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GSA · GVA · SSA · SVA
fibers (Ia, Ib or Golgi, II or Aβ, III or Aδ or fast pain, IV or C or slow pain)
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Efferent nerve fiber/
Motor nerve
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GSE · GVE · SVE
Upper motor neuron · Lower motor neuron (α motorneuron, γ motorneuron, β motorneuron)
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| Termination |
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Synapse
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Electrical synapse/Gap junction · Chemical synapse (Synaptic vesicle, Active zone, Postsynaptic density) · Ribbon synapse · Neuromuscular junction
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Sensory receptors
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Meissner's corpuscle · Merkel nerve ending · Pacinian corpuscle · Ruffini ending · Muscle spindle · Free nerve ending · Olfactory receptor neuron · Photoreceptor cell · Hair cell · Taste bud
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M: CNS
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anat (n/s/m/p/4/e/b/d/c/a/f/l/g)/phys/devp
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noco (m/d/e/h/v/s)/cong/tumr, sysi/epon, injr
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proc, drug (N1A/2AB/C/3/4/7A/B/C/D)
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M: PNS
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anat (h/r/t/c/b/l/s/a)/phys (r)/devp/prot/nttr/nttm/ntrp
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noco/auto/cong/tumr, sysi/epon, injr
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proc, drug (N1B)
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