Tracts in the CNS that link the brain with the rest of the body are composed of sensory and motor pathways.
- Neural pathways called tracts can be found in the brain and spinal cord (central nervous system).
- Each tract runs bilaterally, either in a hemi section of the spinal cord or on each side of the cerebral hemisphere. A few of the tracts decussate, or crossover, to move downward or upward on the obverse side.
- Neurons synapsing onto one another create tracts, and based on where and how they are arranged inside the tract, these neurons can be categorized as first-order, second-order, or third-order neurons.
- Sensory neurons and motor neurons are both a part of the peripheral nervous system (PNS), which is made up of neurons and neuronal fragments outside of the central nervous system.
- Motor neurons transport messages from the CNS while sensory neurons bring signals into the CNS.
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