| Cranial Nerve |
Type |
Innervation |
Fxn |
Origin |
Exits Skull |
Test 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 |
Cardio Block2anatomy
