fasciculus

[Latin, fascicle. See fascicle.]

1. A bundle of muscle fibres separated from the rest of a muscle block by a sheath of connective tissue called the perimysium.

2. A bundle of nerve fibres.

Pl. fasciculi [L.] fascicle.

• f. arcuatus — a tract of nerve fibers joining the frontal area with the temporal, occipital and parietal regions of the cerebrum.
• f. atrioventricularis — see bundle of His.
• central nervous system f. — a tract of nerve fibers of a common origin but usually identifiable only by experimental means.
• f. cuneatus of medulla oblongata — the continuation into the medulla oblongata of the fasciculus cuneatus of the spinal cord.
• f. cuneatus of spinal cord — the lateral portion of the dorsal funiculus of the spinal cord, composed of ascending fibers that end in the nucleus cuneatus.
• f. gracilis of medulla oblongata — the continuation into the medulla oblongata of the fasciculus gracilis of the spinal cord.
• f. gracilis of spinal cord — the median portion of the dorsal funiculus of the spinal cord, composed of ascending fibers that end in the nucleus gracilis.
• f. lenticularis — a nerve bundle that connects the pallidum with the cerebrum and the brainstem.
• f. longitudinalis — the dorsal and medial part of this bundle of nerve fibers connects the vestibular apparatus with the oculomotor and trochlear motor nuclei as well as the medullary and spinal neurons responsible for the movements of the head and neck.
• f. occipitofrontalis ventralis — a nerve tract which connects the frontal cortex with the occipital lobe.
• uncinate f. — a tract of nerve fibers that connects the frontal and temporal lobes of the cerebral cortex.

Fasciculus is a term used in anatomy. It can refer to a "bundle".^[1]

Types include:

• nervous tissue
  • Superior longitudinal fasciculus
    • Arcuate fasciculus
  • Dorsal longitudinal fasciculus
  • Medial longitudinal fasciculus
  • Flechsig's fasciculus
• A structure in the wrist
• Fasciculus Chemicus
• Fasciculus (ctenophore), a fossil invertebrate genus.

See also

• Fascicle

References

1. ^ fasciculus at Dorland's Medical Dictionary

This anatomy article is a stub. You can help Wikipedia by expanding it. v • d • e

v • d • e Histology: nervous tissue (TA A14.2.00, GA 9.849) Neurons (gray matter) Parts soma axon (axon hillock, axon terminals, axoplasm, axolemma, neurofibril/neurofilament) dendrite (Nissl body, dendritic spine, apical dendrite, basal dendrite) Types bipolar · pseudounipolar · multipolar · pyramidal · Purkinje · granule Afferent nerve fiber/ Sensory nerve 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 fiber/ Motor nerve GSE · GVE · SVE Upper motor neuron · Lower motor neuron (α motorneuron, γ motorneuron) Termination Synapses neuropil · synaptic vesicle Interneuron (Renshaw) · neuromuscular junction · electrical synapse Sensory receptors Meissner's corpuscle · Merkel nerve ending · Pacinian corpuscle · Ruffini ending · Muscle spindle · Free nerve ending · Olfactory receptor neuron · Photoreceptor cell · Hair cell · Taste bud Support Glial cells Astrocyte (Radial glia) · Oligodendrocyte · Ependymal cells (Tanycytes) · Microglia Myelination (white matter) CNS: Oligodendrocyte PNS: Schwann cell · Neurolemma · Nodes of Ranvier/Internode · Schmidt-Lanterman incisures Related connective tissues epineurium · perineurium · endoneurium · nerve fascicle · meninges Other Posterior (Root, Ganglion, Ramus) · Anterior (Root, Ramus) · rami communicantes (Gray, White) · Preganglionic fibers · Postganglionic fibers · Lemniscus · Funiculus · Fasciculus · Decussation · Commissure peripheral nervous system navs: anat/histo/physio/dev, noncongen PNS somatic/autonomic/congen/neoplasia, symptoms+signs/eponymous, proc

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