Association fibers of the brain

Last revised by Daniel J Bell on 21 Apr 2021

Association fibers of the brain, also known as association tracts of the brain or intrahemispheric tracts (cortex-cortex connections 1) are a type of white matter tract that connects different areas in the same hemisphere. There are two types of association fibers: long-range and U-fibers (short-range) 1

DTI tractography can identify the following long range tracts

  • arcuate fasciculus (connections between the Broca, Geschwind and Wernicke areas 2): contains long-range and short-range fibers that connect the frontal, parietal and temporal lobes 3  
  • superior and inferior fronto-occipital fasciculi
  • cingulum (limbic system fibers1
  • uncinate fasciculus
  • superior and inferior longitudinal fasciculi

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