How Central Nervous System (CNS) does work? These tracts take information from the upper part of CNS to the lower part.
If some neurons are present in upper part of CNS and their axons move downward, the bundles of these axons moving downward are called descending tracts. 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.
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