Cranial Nerves

I

olfactory nerve

II

optic nerve

III

oculomotor nerve

IV

trochlear nerve

V

trigeminal nerve

VI

abducens nerve

VII

facial nerve

VIII

vestibulocochlear nerve

IX

glossopharyngeal nerve

X

vagus nerve

XI

accessory nerve

XII

hypoglossal nerve

mnemonic for functions of CN? (sensory, motor, both)

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what cranial nerves (sensory and motor) are tested by the pupillary light reflex?

sensory: CN II (optic)
motor: CN III (oculomotor)

what cranial nerves (sensory and motor) are tested by the gag reflex?

sensory: CN IX (glossopharyngeal)
motor: CN X (vagus)

what cranial nerves (sensory and motor) are tested by the vestibulo-ocular reflex?

sensory: CN VIII (vestibulocochlear)
motor: CN III (oculomotor), CN IV (trochlear), and VN VI (abducens)

what cranial nerves (sensory and motor) are tested by the palpebral reflex?

sensory: CN V (trigeminal)
- medial canthus → testing ophthalmic division
- lateral canthus → testing maxillary division
motor: CN VII (facial)

what cranial nerves (sensory and motor) are tested by the menace response?

sensory: CN II (optic)
motor: CN VII (facial)

what cranial nerves (sensory and motor) are tested by the corneal reflex?

sensory: CN V (trigemenal) opthalmic branch
motor: CN VI (abducens)

what section of the brain is shown?

caudal medulla
- open 4th ventricle
- olivary nucleus
- pyramids (indicate medulla)

what section of the brain is shown?

middle medulla
- open 4th ventricle
- no trapezoid body
- no olivary nuclei
- pyramids (indicates medulla)

what section of the brain is shown?

rostral medulla
- closed 4th ventricle
- trapezoid body
- pyramids

what section of the brain is shown?

pons
- closed 4th ventricle
- upside down muffin shape
- trigeminal nerve stump

what section of the brain is this?

midbrain
- mickey mouse shape
- ears = medial geniculate nucleus of the thalamus
- rostral colliculi
- mesencephalic aqueduct
- cerebral peduncle

what section of the brain is this?

forebrain (thalamus)
- 3rd ventricle
- lateral ventricles

what section of the brain is this?

forebrain - cortex
- lateral ventricles
- gyra and sulci

where to find nuclei of CN I and II?

forebrain

where to find nuclei of CN III and IV?

midbrain

where to find nuclei of CN V