pertaining to or connecting the cerebral cortex and the medulla oblongata or brainstem.
Miller-Keane Encyclopedia and Dictionary of Medicine, Nursing, and Allied Health, Seventh Edition. © 2003 by Saunders, an imprint of Elsevier, Inc. All rights reserved.
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.
Farlex Partner Medical Dictionary © Farlex 2012
Pertaining to corticofugal fibers projecting to the rhombencephalon that terminate 1) directly on some motor cranial nerve nuclei, 2) in the reticular formation, or 3) on sensory relay nuclei, such as the cuneate, gracile, and spinal trigeminal nucleus.
Medical Dictionary for the Health Professions and Nursing © Farlex 2012