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Cranial Nerves 1-6

Cranial NerveTypeInnervationFxnOriginExits SkullTest for Lesion
1 - Olfactory sensory nasal cavity smell telencephalon cribiform plate (ethmoid bone)/ ACF lack of smell
2- Optic sensory orbit sight diencephalon optic canal/ MCF lack of sight
3- Occulomotor motor and parasympathetic orbit motor- raises eyelids and adducts eye. parasymp- contricts pupil and accomodates eye midbrain (edinger-westphal nucleus) superior orbital fissure/ MCF cannot adduct eye
4- Trochlear motor orbit depresses and abducts eye, intorts eye midbrain (trochlear nucleus) superior orbital fissure/ MCF cannot intort eye
V1- Ophthalmic (trigeminal) sensory orbit, scalp sensory of forehead, scalp, cornea pons superior orbital fissure/ MCF lack of sensory to forehead
V2- Maxillary (trigeminal) sensory pterygopalatine fossa sensations of maxillary face, maxillary teeth, nasal cavity and palate pons foramen rotundum/ MCF lack of sensation to maxilla/ nasal cavity
V3- Mandible (trigeminal) sensory/ motor infratemporal fossa sensory- mandible, mandibular teeth, general sensation of anterior 2/3 tongue. motor- muscles of mastication, tensor muscles of neck/face pons foramen ovale/ MCF inability to chew food/ feel touch on tongue
6- Abducent motor orbit abduct the eye pons superior orbital fissure/ MCF cannot horizontally gaze
Created by: som2007