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cranial nerves
| Question | Answer |
|---|---|
| CN I | olfactory |
| where does CN I exit? | cribriform plate |
| CN II | optic |
| where does CN II exit? | optic foramen |
| what can a pituitary tumor affect? | vision - it sits on top of optic chiasm |
| CN III | oculomotor |
| where does CN III exit? | superior orbital fissure |
| muscles of CN III | extra ocular eye muscles - not included are lateral rectus & superior oblique |
| what muscle is responsible of eyelid movement | levator palpeerde superioris |
| preganglionic nucleus of CN III | edinger westphall |
| where do preganglionics of CN III synapse | ciliary ganglion |
| what nerve does CN III travel with | nasociliary - V1 |
| where doe parasympathetics of CN III innervate | lens & pupil |
| CN IV | trochlear |
| where does CN IV exit? | superior orbital fissure |
| CN V1 | ophthalmic |
| where does CN V1 exit? | superior orbital fissure |
| branches of V1 | nasociliary frontal lacrimal |
| V2 | maxillary |
| where does CN V2 exit? | foramen rotundum |
| where is CN V2 found? | pterygopalatine fossa |
| branches of V2 | greater palatine lesser palatine superior alveolar zygomatic infraorbital nasopalatine |
| V3 | mandibular |
| where does CN V3 exit? | foramen ovale |
| where is V3 found? | infra temporal fossa |
| branches of V3 | lingual inferior alveolar auricoltemporal |
| what nerve innervates muscles of mastication | V3 |
| VI | abducens |
| where does CN VI exit? | superior orbital fissure |
| VII | facial |
| where does CN VII exit? | internal acoustic meatus |
| branches of VII | facial nerve proper chorda tympani greater petrosal |
| branches of facial nerve proper | temporal zygomatic buccal mandibular cervical |
| what nerve of chorda tympani travel with | V3 |
| where does chorda tympani synapse | submandibular ganglion |
| what nerve does greater petrosal travel with | V2 and jumps to V1 |
| where does greater petrosal synapse | pterygopalatine ganglion |
| VIII | vestibulocochlear |
| where does CN VIII exit? | internal acoustic meatus |
| IX | glossopharyngeal |
| where does CN IX exit? | jugular foramen |
| preganglionic nucleus of IX | inferior salivatory |
| where does IX synapse | otic ganglion |
| what does IX travel with | auriculotemporal - V3 |
| where does IX innervate | parotid gland |
| X | vagus |
| where does CN X exit? | jugular foramen |
| XI | accessory |
| where does CN XI exit? | jugular foramen |
| XII | hypoglossal |
| where does CN XII exit? | hypoglossal canal |
| purely afferent CN's | I, II, VIII |
| purely efferent CN's | IV, VI, XI, XII |
| CN's that cary parasympathetics | III, VII, IX |
| CN's that innervate the tongue | XII, X, IX, V, VII |
| parasympathetic ganglia | ciliary pteryogpalatine submandibular otic |
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