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reticular nuclei of the brainstem


Definition: the vaguely delineated cell groups composing the gray matter of the reticular formation of the medulla oblongata, pons, and mesencephalon. In general, large-celled territories occupy the medial two thirds of the reticular formation: some examples are gigantocellular nucleus of medulla oblongata and the nuclei tegmenti pontis caudalis and oralis. Smaller groups of reticular nuclei are found laterally and in paramedian locations; lateral nuclei receive sensory collaterals and project medially; paramedian reticular nuclei largely project to the cerebellum.

See Also: reticular formation

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