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Brain: Association fiber
Diagram showing principal systems of association fibers in the cerebrum.
Dissection of cortex and brain-stem showing association fibers and island of Reil after removal of its superficial gray substance.
Latin	fibrae associationis telencephali
Gray's	subject #189 843

The association fibers unite different parts of the same cerebral hemisphere, and are of two kinds: (1) those connecting adjacent gyri, short association fibers; (2) those passing between more distant parts, long association fibers.

Contents 1 Short association fibers 2 Long association fibers 3 See also 4 External links

[edit] Short association fibers

The short association fibers lie immediately beneath the gray substance of the cortex of the hemispheres, and connect together adjacent gyri.

[edit] Long association fibers

The long association fibers include the following:

Name	From	To
uncinate fasciculus	frontal lobe	temporal lobe
cingulum	cingulate gyrus	entorhinal cortex
superior longitudinal fasciculus	frontal lobe	occipital lobe
inferior longitudinal fasciculus	occipital lobe	temporal lobe
perpendicular fasciculus	inferior parietal lobule	fusiform gyrus
occipitofrontal fasciculus	occipital lobe	frontal lobe
fornix	hippocampus	mammillary bodies
Arcuate fasciculus	frontal lobe	temporal lobe

[edit] See also

• interneuron

[edit] External links

• Association+fibers at eMedicine Dictionary
• NeuroNames ancil-672
• NeuroNames ancil-673

This article was originally based on an entry from a public domain edition of Gray's Anatomy. As such, some of the information contained within it may be outdated.

v • d • e Histology: nervous tissue (TA A14.2.00, GA 9.849) Neurons (grey 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 Projection fibers · Association fiber · Commissural fiber peripheral nervous system navs: anat/histo/physio/dev, noncongen PNS somatic/autonomic/congen/neoplasia, symptoms+signs/eponymous, proc

v • d • e Human brain, cerebrum, white matter: Association fibers (TA A14.1.09.553-569, GA 9.843) Association fibers Uncinate fasciculus - Cingulum - Superior longitudinal fasciculus/Arcuate fasciculus - Inferior longitudinal fasciculus - Inferior occipitofrontal fasciculus

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