Cranial Nerve Flashcards: Names, Numbers, Functions & Tests

Question 1

CN I — nerve name?

Accepted Answer

Olfactory nerve.

Question 2

CN II — nerve name?

Accepted Answer

Optic nerve.

Question 3

CN III — nerve name?

Accepted Answer

Oculomotor nerve.

Question 4

CN IV — nerve name?

Accepted Answer

Trochlear nerve.

Question 5

Olfactory nerve — cranial nerve number?

Accepted Answer

CN I.

Question 6

CN V — nerve name?

Accepted Answer

Trigeminal nerve.

Question 7

Optic nerve — cranial nerve number?

Accepted Answer

CN II.

Question 8

CN VI — nerve name?

Accepted Answer

Abducens nerve.

Question 9

Oculomotor nerve — cranial nerve number?

Accepted Answer

CN III.

Question 10

CN VII — nerve name?

Accepted Answer

Facial nerve.

Question 11

Trochlear nerve — cranial nerve number?

Accepted Answer

CN IV.

Question 12

CN VIII — nerve name?

Accepted Answer

Vestibulocochlear nerve.

Question 13

Trigeminal nerve — cranial nerve number?

Accepted Answer

CN V.

Question 14

CN IX — nerve name?

Accepted Answer

Glossopharyngeal nerve.

Question 15

Abducens nerve — cranial nerve number?

Accepted Answer

CN VI.

Question 16

CN X — nerve name?

Accepted Answer

Vagus nerve.

Question 17

Facial nerve — cranial nerve number?

Accepted Answer

CN VII.

Question 18

CN XI — nerve name?

Accepted Answer

Accessory nerve, also called the spinal accessory nerve.

Question 19

Vestibulocochlear nerve — cranial nerve number?

Accepted Answer

CN VIII.

Question 20

CN XII — nerve name?

Accepted Answer

Hypoglossal nerve.

Question 21

Glossopharyngeal nerve — cranial nerve number?

Accepted Answer

CN IX.

Question 22

Vagus nerve — cranial nerve number?

Accepted Answer

CN X.

Question 23

Accessory nerve — cranial nerve number?

Accepted Answer

CN XI.

Question 24

Hypoglossal nerve — cranial nerve number?

Accepted Answer

CN XII.

Question 25

CN I (olfactory) — sensory, motor, or mixed?

Accepted Answer

Sensory.

Question 26

CN VIII (vestibulocochlear) — sensory, motor, or mixed?

Accepted Answer

Sensory.

Question 27

CN III (oculomotor) — sensory, motor, or mixed?

Accepted Answer

Motor. Its motor classification includes somatic motor and parasympathetic output.

Question 28

CN VII (facial) — sensory, motor, or mixed?

Accepted Answer

Mixed.

Question 29

CN XI (accessory) — sensory, motor, or mixed?

Accepted Answer

Motor.

Question 30

CN II (optic) — sensory, motor, or mixed?

Accepted Answer

Sensory.

Question 31

CN V (trigeminal) — sensory, motor, or mixed?

Accepted Answer

Mixed.

Question 32

CN IX (glossopharyngeal) — sensory, motor, or mixed?

Accepted Answer

Mixed.

Question 33

CN IV (trochlear) — sensory, motor, or mixed?

Accepted Answer

Motor.

Question 34

CN X (vagus) — sensory, motor, or mixed?

Accepted Answer

Mixed.

Question 35

CN XII (hypoglossal) — sensory, motor, or mixed?

Accepted Answer

Motor.

Question 36

CN VI (abducens) — sensory, motor, or mixed?

Accepted Answer

Motor.

Question 37

CN I (olfactory) — primary sensory function?

Accepted Answer

Smell, or olfaction.

Question 38

CN II (optic) — what information does it carry from the retina?

Accepted Answer

Visual sensory information.

Question 39

CN III (oculomotor) — which four extraocular muscles does it innervate?

Accepted Answer

Superior rectus, inferior rectus, medial rectus, and inferior oblique.

Question 40

CN IV (trochlear) — extraocular muscle target?

Accepted Answer

Superior oblique muscle.

Question 41

CN V1 (ophthalmic division) — main sensory territory?

Accepted Answer

The upper face, including the forehead and cornea.

Question 42

CN VI (abducens) — extraocular muscle target?

Accepted Answer

Lateral rectus muscle.

Question 43

CN VII (facial) — main somatic motor function?

Accepted Answer

Movement of the muscles of facial expression.

Question 44

CN VIII (vestibulocochlear) — cochlear branch function?

Accepted Answer

Hearing.

Question 45

CN IX (glossopharyngeal) — taste territory?

Accepted Answer

The posterior one-third of the tongue.

Question 46

CN X (vagus) — key motor targets in the mouth and throat?

Accepted Answer

The pharyngeal and soft-palate muscles used in swallowing.

Question 47

CN XI (accessory) — sternocleidomastoid function?

Accepted Answer

Turning the head to the opposite side.

Question 48

CN XII (hypoglossal) — main muscle targets?

Accepted Answer

The intrinsic and extrinsic tongue muscles, except palatoglossus.

Question 49

CN I (olfactory) — where do fibers from the nasal olfactory mucosa first synapse?

Accepted Answer

In the olfactory bulb, after passing through the cribriform plate.

Question 50

CN II (optic) — role in the pupillary light reflex?

Accepted Answer

It forms the afferent sensory limb that detects the light stimulus.

Question 51

CN III (oculomotor) — role in eyelid position?

Accepted Answer

It supplies levator palpebrae superioris, which elevates the upper eyelid.

Question 52

CN IV (trochlear) — key eye-movement contribution?

Accepted Answer

Through the superior oblique, CN IV intorts the eye; it depresses the eye most strongly in adduction.

Question 53

CN V2 (maxillary division) — main sensory territory?

Accepted Answer

The midface, including the cheek, upper lip, and maxillary teeth.

Question 54

CN VI (abducens) — primary eye movement?

Accepted Answer

Abduction: moving the eye laterally, away from the nose.

Question 55

CN VII (facial) — taste territory?

Accepted Answer

The anterior two-thirds of the tongue, carried through the chorda tympani.

Question 56

CN VIII (vestibulocochlear) — vestibular branch function?

Accepted Answer

Balance and sensory information about head orientation and motion.

Question 57

CN IX (glossopharyngeal) — what visceral sensory information comes from the carotid sinus and body?

Accepted Answer

Blood-pressure and blood-chemistry signals, respectively.

Question 58

CN X (vagus) — key laryngeal motor function?

Accepted Answer

Motor control of the intrinsic laryngeal muscles for phonation.

Question 59

CN VII (facial) — role in the corneal reflex?

Accepted Answer

It carries the efferent motor limb that closes the eyelids through orbicularis oculi.

Question 60

CN XII (hypoglossal) — role in tongue protrusion?

Accepted Answer

It supplies genioglossus, a principal muscle for protruding the tongue.

Question 61

CN III (oculomotor) — parasympathetic effect on the pupil?

Accepted Answer

Pupillary constriction through the sphincter pupillae.

Question 62

CN V3 (mandibular division) — main sensory territory?

Accepted Answer

Most of the lower face and jaw, plus mandibular teeth and general sensation from the anterior two-thirds of the tongue.

Question 63

CN VII (facial) — parasympathetic role in tear production?

Accepted Answer

It provides secretomotor input to the lacrimal gland.

Question 64

CN IX (glossopharyngeal) — motor target that assists swallowing?

Accepted Answer

Stylopharyngeus, which elevates the pharynx during swallowing.

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