The Cranial Nerves in addition to Cranial Nerve Nuclei of the Brain Stem Objectives: Learn

The Cranial Nerves in addition to Cranial Nerve Nuclei of the Brain Stem Objectives: Learn www.phwiki.com

The Cranial Nerves in addition to Cranial Nerve Nuclei of the Brain Stem Objectives: Learn

Naugle, Kim, Music Reporter has reference to this Academic Journal, PHwiki organized this Journal The Cranial Nerves in addition to Cranial Nerve Nuclei of the Brain Stem Objectives: Learn the name in addition to numerical designation of each of the twelve cranial nerves Learn the names in addition to functions of the cranial nerve nuclei of the brain stem in addition to the nerves that arise or terminate in each of these nuclei Learn the location of each of the cranial nerve nuclei of the brain stem on the brain stem model 12 pairs of Cranial Nerves arise from the as long as ebrain in addition to the brain stem. I Olfactory Telencephalon II Optic Diencephalon Cranial Nerves III through XII arise from the Brain Stem: Midbrain III Oculomotor IV Trochlear Pons V Trigeminal VI Abducens VII Facial Medulla VIII Vestibulocochlear IX Glossopharyngeal X Vagus XII Hypoglossal Cranial Nerve XI – Spinal Accessory Nerve arises from the Spinal Cord I II III IV VI V VII VIII IX X XI XII Drawing A shows the ventral surface of a model of a dissected human brain. The cerebral cortex with its underlying white matter in addition to the cerebellum have been removed. In the as long as ebrain the caudate (c) in addition to putamen (p) join together in the anterior, ventral area of the basal ganglia. Cranial nerves: OPTIC II OCULOMOTOR III TROCHLEAR IV TRIGEMINAL V ABDUCENS VI FACIAL VII VESTIBULOCOCHLEAR VIII GLOSSOPHARYNGEAL IX VAGUS X HYPOGLOSSAL ROOTLETS XII SPINAL ACCESSORY XI c p Only the trochlear nerve IV arises from the dorsal surface of the brain stem. It courses around the midbrain to join III in addition to VI to enter the orbit. A B dorsal view c th midbrain pons medulla spinal cord

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Cranial Nerve Nuclei The cranial nerves innervate the head in addition to neck, Cranial nerve fibers include the same four “general” functional components as the spinal nerves : GSE, GVE, GVA in addition to GSA. In addition the head contains 1) “special” visceral sensory organs as long as olfaction in addition to taste, 2) “special” somatic sensory organs as long as vision, audition, in addition to balance, in addition to 3) a “special” group of muscles embryologically derived from the branchial arches. Thus seven functionally-distinct columns of cells in the brain stem comprise the cranial nerve nuclei: GSE somatic motor GVE preganglionic parasympathetic SVE branchial motor GVA visceral sensory SVA olfaction in addition to taste GSA somatosensory SSA audition in addition to vestibular function The model shows a “dissection” of the cranial nerve nuclei in the tegmentum of the brain stem. GSE SOMATIC MOTOR oculomotor III trochlear IV abducens VI hypoglossal XII tongue mm. GVE PARASYMPATHETIC Edinger Westphal III (not on model) salivatory nuclei VII, IX dorsal motor nucleus of X SVE BRANCHIOMOTOR motor nuc. V mastication facial nuc. VII facial expression nucleus ambiguus IX, X, cXI pharynx, larynx accessory sXI trapezius, sternomastoid IV III VI XII V VII sXI MOTOR NULCEI VII IX extraocular mm. X Nucleus ambiguus IX, X in addition to cXI VIII vestibular VIII cochlear rost nuc solitarius VII, IX, X caud nuc solitarius IX, X V principal sensory SENSORY NULCEI SSA AUDITION AND BALANCE vestibular VIII cochlear VIII GSA SOMATOSENSORY trigeminal V: mesencephalic proprioception principal sensory discriminative touch spinal pain & temperature SVA TASTE nucleus solitarius, rostral VII, IX, X GVA PAIN, etc. nucleus solitarius caudal IX, X V spinal V mesencehaplic

A B C D E F G H Match each cranial nerve nucleus (A – H) with the appropriate functional designation (1 – 8). — 1. receives pain input from teeth — 2. innervates pharyngeal mm. — 3. receives input from inner ear — 4. Innervates tongue mm. — 5. receives fine tactile input from lips — 6. Innervates mm. of mastication — 7. preganglionic parasympathetic — 8. Innervates extraocular mm. I Cranial Nerves in addition to Cranial Nerve Nuclei of the Brain Stem Question I Cranial Nerves in addition to Cranial Nerve Nuclei of the Brain Stem ANSWER SHEET Question I E D C I B G H F

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