projection fibers


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projection fibers

[prə′jek·shən ‚fī·bərz]
(anatomy)
Fibers joining the cerebral cortex to lower centers of the brain, and vice versa.
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References in periodicals archive ?
Meynert (25) (1833-1892), professor of Neurology and Psychiatry, introduced the latest concepts of association and projection fibers.
The white fiber tracts in the brain are divided into three groups: association fibers that connect different cortical regions within the same hemisphere as the U-shape fibers, or arched fibers; commissural fibers that are responsible for the connection of the two hemispheres, for instance, the corpus callosum and the anterior commissure; and finally, projection fibers that establish connection between cortical and other CNS structures at different levels, such as the basal ganglia, brain stem and spinal cord, as well as other distant cortical regions (4).
In this sense, the optical radiation can be considered as projection fibers, which leads visual information from the thalamus (lateral geniculate body) to the occipital cortex around the calcarine sulci.