MBB EXAM 1 CRANIAL NERVES

olfactory cortex 

orgin (nucleus) of OLFACTORY nerve (CN I) 

thalamus and midbrain

orgin (nucleus) of OPTIC nerve (CN II) 

midbrain

orgin (nucleus) of OCCULOMOTOR nerve (CN III) 

midbrain

orgin (nucleus) of TROCHLEAR nerve (CN IV) 

pons

orgin (nucleus) of TRIGEMINAL nerves (CN V1-3) 

V3 (mandibular) 

which nerve innervates the muscles of mastication? 

pons/pontomedullary junction

orgin (nucleus) of ABDUCENS nerve (CN VI) 

pontomedullary junction

orgin (nucleus) of FACIAL nerve (CN VII) 

pontomedullary junciton 

orgin (nucleus) of VESTIBULOCOCHLEAR nerve (CN VIII) 

medulla

orgin (nucleus) of GLOSSOPHARYNGEAL nerve (CN IX) 

medulla

orgin (nucleus) of VAGUS nerve (CN X) 

upper spinal cord

orgin (nucleus) of SPINAL ACCESSORY nerve (CN XI) 

medulla

orgin (nucleus) of HYPOGLOSSAL nerve (CN XII) 

anosmia, kallman, parkinsons

common conditions of CN I (olfactory) 

optic neuritis, glaucoma

common conditions of CN II (optic)

diplopia (double vision) , anisocoria (unequal pupil size), diabetic ischemic 3rd, aneurysm compression

common conditions of CN III (occulomotor)

diplopia (double vision) , trauma

common conditions of CN IV (trochlear)

trigeminal neuralgia, herpes zoster ophthalmicus (Hutchinson’s sign

common conditions of CN V1 (opthalmic )

trigeminal neuralgia, dental nerve blocks

common conditions of CN V2 (maxillary) 

trigeminal neuralgia, dental nerve blocks

common conditions of CN V3 (mandibular)

diplopia, increased intracranial pressure

common conditions of CN VI (abducens)

Bell’s palsy, Ramsay Hunt syndrome

common conditions of CN VII (facial)

hearing loss, tinnitus, vertigo, vestibular neuritis

common conditions of CN VIII (vestibulocochlear)

Lateral medullary syndrome, loss of gag reflex (afferent), glossopharyngeal neuralgia

common conditions of CN IX (glossopharyngeal)

Lateral medullary syndrome, ALS, loss of gag reflex, recurrent laryngeal nerve injury

common conditions of CN X (vagus)

ALS

common conditions of CN XII