brainstem

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Definition/MeaningWord/Phrase
any of the important motor nerves on each side of the central nervous system that run from the sensorimotor areas of the cortex through the brainstem to motor neurons of the cranial nerve nuclei and the ventral horn of the spinal cord corticospinal tract , pyramidal motor system , pyramidal tract
posterior portion of the brain including cerebellum and brainstem hindbrain , rhombencephalon
complex neural network in the central core of the brainstem; monitors the state of the body and functions in such processes as arousal and sleep and attention and muscle tone reticular formation , RF
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