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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 |