Cranial Nerve Review

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Cranial Nerves

- attached to the brainstem at the cranial nerve nuclei

-know origin and function

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CN I: Olfactory (Sensory)- cerebral hemispheres- smell

CN II: Optic (Sensory)- Diencephalon (hypothalamus and thalamus)- vision

CN III: Oculomotor (Motor)- midbrain- eye movement; pupil constriction; eyelid opening

CN: Trochelar (Motor)- midbrain- eye movement

CN V: Trigeminal (Both)- pons- jaw movement; face, mouth, jaw sensation

CN VI: Abducens (Motor)- pons- eyemovement

CN VII: Facial (Both)- pons- facial movement; hyoid elevation; stapedius reflex; salivation; lacrimation; taste (anterior 2/3 of tongue); eyelid closing

CN VIII: Acoustic/Cochleovestibular (Sensory)- pons, medulla- hearing; balance

CN IX: Glossopharyngeal (Both)- medulla- pharyngeal movement; pharynx and tongue sensation; taste (posterior 2/3 of tongue); swallowing

CN X: Vagus (Both)- medulla- pharyngeal, palatal, and laryngeal movement; swallow; pharyngeal sensation; control of visceral organs

CN XI: Accessory (Motor)- medulla, spinal cord- shoulder and neck movement

CN XII: Hypoglossal (Motor)- medulla- tongue movement