corticobulbar fibers

cor·ti·co·bul·bar fi·bers

term formerly used to describe projections of the motor and sensory cortices to nuclei of the rhombencephalon innervating the musculature of the face, tongue, and jaws and some fibers to rhombencephalic relay nuclei; replaced by bulbar corticonuclear fibers (to medulla), pontine corticonuclear fibers (to pons), and mesencephalic corticonuclear fibers (to midbrain). See these individual entries.
References in periodicals archive ?
Brain damage causes spasticity due to the disruption of facilitatory corticobulbar fibers and causes inhibition of ventromedial reticular formation [3].