Lecture 7 - Brainstem and Cranial Nerves

Question 1

Which cranial nerve does not go through the thalamus ?

Answer 1

Olfactory nerve

Question 2

olfactory nerves passes through skull via ____ ______?

Answer 2

cribiform plate

Question 3

Which nerves have mixed sensory and motor components ?

Answer 3

CN V, VII, IX, X

Question 4

the brainstem contains nuclei of which cranial nerves?

Answer 4

CN 3-12

Question 5

which nerve is seen from the anterior surface of the midbrain?

Answer 5

CN III

Question 6

the deep midline depression of the midbrain is called?

Answer 6

interpeduncular fossa

Question 7

what system is the superior colliculi responsible for?

Answer 7

visual system

Question 8

which 3 nerves emerge between pons and medulla?

Answer 8

CN VI – abducens nerve
CN VII – facial nerve
CN VIII – vestibulocochlear

Question 9

True of false: the pyramids contain ascending motor pathways ?

Answer 9

False. descending motor pathways

Question 10

what is the function of the decussation of the pyramids?

Answer 10

cross-over of descending motor pathway

Question 11

which cranial nerve arises from the inferior olive and the pyramids ?

Answer 11

Hypoglossal nerve (CN XII)

Question 12

Which 3 nerves are seen form the lateral surface of the medulla oblongata ?

Answer 12

CN IX: glossopharyngeal
• CN X: vagus nerve
• CN XI: accessory nerve (cranial roots)

Question 13

True or false: Gracilis and cuneate nuclei are nuclei for one of the ascending motor pathways

Answer 13

false. ascending sensory pathways

Question 14

true of false. the information about smell travels by olfactory tract along ventral surface of frontal lobes

Answer 14

true

Question 15

which nerve supplies the lateral rectus muscle?

Answer 15

abducens nerve

Question 16

the 2 oblique eye muscles both have the same function as they move the eye medially or laterally?

Answer 16

medially

Question 17

the Oculomotor nerve supplies which 4 muscles ?

Answer 17

inferior rectus
superior rectus
medial rectus
inferior oblique

Question 18

the levator palpabrae is responsible for what function ?

Answer 18

lifting upper eyelid

Question 19

how do you test and isolate the superior rectus?

Answer 19

look out, then up

Question 20

how do you test and isolate the Inferior oblique?

Answer 20

look in and up

Question 21

which cranial nerves pass through the superior orbital fissure?

Answer 21

CN III, IV, VI

and V1 ophthalmic branch of CN V

Question 22

which nerve passes through the cribriform plate ?

Answer 22

CN 1

Question 23

the trigeminal nerve has a large sensory root that expands to form trigeminal ganglion near which sinus?

Answer 23

cavernous sinus

Question 24

what are the 3 sensory components of the trigeminal nerve ?

Answer 24

V1 = ophthalmic nerve, V2 = maxillary nerve, V3 = mandibular nerve

Question 25

which nerve is involved in the sensation of touch for the anterior 2/3’s of the tongue ?

Answer 25

Trigeminal Nerve (CN V)

Question 26

True or false? Bells Palsy produces contralateral facial muscle weakness.

Answer 26

false. ipsilateral

Question 27

which cranial nerve supplies muscles of pharynx (swallowing) and larynx (speech)?

Answer 27

Vagus nerve (CN X)

Question 28

the accessory nerve supplies which 2 muscles?

Answer 28

sternocleidomastoid and trapezius muscles

Question 29

which nerve supplies all intrinsic tongue muscles and extrinsic muscles controlling tongue?

Answer 29

Hypoglossal Nerve (CN XII)

Question 30

true or false: ipsilateral tongue weakness causes the tongue to deviates towards the opposite side of the lesion.

Answer 30

false.towards the same side of the lesion

Question 31

the jugular foramen allows which nerves to pass through?

Answer 31

CN IX, X, XI

Question 32

which nerves have a parasympathetic component ?

Answer 32

III, VII, IX, X

Question 33

what is the function of the optic nerve?

Answer 33

function: carries visual information from retina

Question 34

true or false? information about smell travels by olfactory tract along ventral surface of frontal lobes ?

Answer 34

true

Question 35

Gracilis and cuneate nuclei are nuclei for one of the ascending ______ pathways (answer: sensory or motor)

Answer 35

sensory