Cranial nerves

CN I: olfactory nerve

sensory, smell

CN II: optic nerve

sensory, vision

CN III: oculomotor nerve

motor, eye movement/pupil reflex

CN IV: trochlear nerve

motor, eye movement

CN V: trigeminal nerve

both, face sensation/chewing

CN VI: abducens nerve

motor, eye movement

CN VII: facial nerve

both, face movement/taste

CN VIII: vestibulocochlear nerve

sensory, hearing/equilibrium/balance

CN IX: glossopharyngeal nerve

both, movement & sensation in abdominal & thoracic region

what nerve has many parasympathetic nerves in the body

CN X: vagus nerve

CN XI: accessory nerve

motor, movement in head & neck

CN XII: hypoglossal nerve

motor, tongue movement

what nerve has three divisions

CN V: trigeminal nerve

CN V1 opthalmic division

sensory, innervates skin of forehead/upper eyelid/cornea/frontal sinus/meninges

what is the pathway of CN V1 opthalmic division

supraorbital foramen → orbital cavity → trigeminal ganglion → brainstem

CN V2 maxillary division

sensory, innervates skin of midface (above upper lip/cheeks/upper gums/teeth/nasal cavity)

what is the pathway of CN V2 maxillary division

infraorbital foramen → orbital cavity → foramen rotundum → trigeminal ganglion → brainstem

CN V3 mandibular division

both, sensory = innervates skin below lips/ear drum/lower gums/teeth/TMJ, motor = innervates muscles of mastication

What are the branches of CN V3 mandibular division

lingual nerve, inferior alveolar nerve, mental nerve

lingual nerve innervates

anterior 2/3 tongue

inferior alveolar nerve innervates

lower teeth/gums

mental nerve innervates

skin of lips

what is the pathway for CN V3 mandibular division

foramen ovule → trigeminal ganglion → brainstem

what does the CN VII: facial nerve innervate

taste info for anterior 2/3 tongue

What does the CN VII: facial nerve have autonomic innervation to

lacrimal glands, salivary glands, mucus glands

What is the syndrome called when the myelin sheaths are worn down and are firing 24/7 of CN V: trigeminal nerve

trigeminal neuralgia

What nerve are dentists supposed to anesthetize, and what actually happens

inferior alveolar nerve, leaks to mental and lingual nerves

What disease is caused by a lesion on CN VIII

bells palsy: facial paralysis of one side