reticular nuclei of the brainstem

re·tic·u·lar nu·cle·i of the brain·stem

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.