Association fiber

Association fiber
Diagram showing principal systems of association fibers in the cerebrum.
Dissection of cerebral cortex and brainstem showing association fibers and insular cortex after removal of its superficial grey matter
Details
Latin	Fibrae associationis telencephali
Identifiers
Dorlands /Elsevier	f_05/12361847
TA
TH	{{#property:P1694}}
TE	{{#property:P1693}}
FMA	{{#property:P1402}}
Anatomical terms of neuroanatomy [[[d:|edit on Wikidata]]]

Association fibers are bundles of axons within the brain that unite different parts of the same cerebral hemisphere.

In human neuroanatomy, bundles of axons within the brain, called fibers, can be categorized by their function into association fibers, projection fibers, and commissural fibers.

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.

Short association fibers

The short association fibers (also often referred to as "U-fibers") lie immediately beneath the gray substance of the cortex of the hemispheres, and connect together adjacent gyri.

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
vertical occipital fasciculus	inferior parietal lobule	fusiform gyrus
occipitofrontal fasciculus	occipital lobe	frontal lobe
fornix	hippocampus	mammillary bodies
Arcuate fasciculus	frontal lobe	temporal lobe

Diffusion tensor imaging is a non-invasive method to study the course of association fibers.

See also

• Interneuron
• Tractography

References

This article incorporates text in the public domain from the 20th edition of Gray's Anatomy (1918)

External links

• ancil-672 at NeuroNames
• ancil-673 at NeuroNames