What is U FIBER?

Written by Pam MS, NCSP | Fact checked by Psychology Dictionary staff 

a nerve fiber which loops through the white matter under the cerebral cortex to link one cortical region to another one. U fibers supply the quickest path for cortical conveying of urges; the optional intracortical pathway is made up of extremely thin fibers with slow transmission rates.

U FIBER: "The U fibers are not present in the last few slides."

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