These tracts are responsible to take information from lower part of CNS to the upper part. If the neurons are present in lower part of CNS and their axons move upward, the bundles of these axons moving upward are called ascending tracts. ascending tracts and descending tracts which connect CNS vertically.ī) Association fibers: These fibers connect CNS anteroposteriorly or posteroanteriorly.Ĭ) Commissure fibers: These fibers connect CNS components right and left, e.g. What is Grey Matter?Ĭollection of cell bodies of neurons is called Grey matter. The tracts move upward and downward connecting the CNS in cephalocaudal axis. The bundle of axons within the CNS having common origin and common termination is called a tract. Master Medical Sciences with crystal clear concepts. Not a member? Sign up now to access 800+ videos on Basic Medical Sciences & Clinical Medicine.
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