Association fiber

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Association fiber
Gray751.png
Diagram showing principal systems of association fibers in the cerebrum.
Gray752.png
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
Gray's p.843
Dorlands
/Elsevier
f_05/12361847
TA A14.1.00.016
A14.1.09.553
FMA FMA:75241
Anatomical terms of neuroanatomy

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[edit]

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[edit]

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

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

See also[edit]

References[edit]

This article incorporates text from a public domain edition of Gray's Anatomy.

External links[edit]