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Unit 4 BMS 307

Head and Neck

Cranial Nerve Function OriginDestinationforamen
CN I (Olfactory) Special sensory (smell = olfaction) olfactory epithelium (inside superior nasal cavity) olfactory bulbs (olfactory tracts then transfer info to the rest of the brain)
CN II (Optic) special sensory (vision) retina diencephalon, then to occipital lobe optic canal
CN III (Oculomotor) Controls extra-ocular eye muscles, parasympathetic innervation. Somatic Motor function: eye + eyelid movement Visceral Motor: pupil constriction, lens convexity mesencephalon (midbrain) extra-ocular eye muscles (all except 2: ciliary body & pupillary muscles) superior orbital fissure
CN IV (Trochlear) Controls one extra-ocular eye muscle Somatic motor function: eye movement (superior oblique muscle) mesencephalon Superior oblique muscle superior orbital fissure
CN V (Trigeminal) Mixed (general sensory and somatic motor) 3 parts: Ophthalmic (V1), Maxillary (V2), & Mandibular (V3) Sensory parts: Skin of the face Somatic Motor part (V3 only): Pons Ophthalmic, Maxillary, and sensory part of Mandibular: Pons Motor part of Mandibular: Jaw muscles- mastication (chewing) Opthalmic (V!): superior orbital fissure Maxillary (V2): foramen rotundum Mandibular (V3): foramen ovale
CN VI (Abducens) controls one extra-ocular muscle Somatic motor function: eye movement (eye abduction) Lateral Rectus muscle pons lateral rectus eye muscle superior orbital fissure
CN VII (Facial) Mixed (sensory & motor) Special sensory: taste Somatic motor: controls muscles for facial expression Visceral Motor: Parasympathetic for eye, nose and mouth secretion Somatoc Sensory
CN VIII
CN IX
CN X
Created by: user-2002504
 

 



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