Cranial Nerves

Question 1

Which 2 cranial nerves are extensions of the forebrain?

Answer 1

CN I-II (Olfactory nerve and optic nerve)

Question 2

Which cranial nerves exit from the brain stem?

Answer 2

CN III-XII exit from the brainstem except XI

Question 3

Describe the olfactory nerve

Answer 3

Responsible for smell, purely sensory

Question 4

What is anosmia?

Answer 4

Inability to smell

Question 5

What number is the number of optic nerve?

Answer 5

Cranial. Nerve 2

Question 6

What number is the olfactory nerve?

Answer 6

Cranial nerve 1

Question 7

What nerve number is the oculomotor nerve?

Answer 7

Cranial nerve 3

Question 8

What nerve number is the trochlear nerve?

Answer 8

Cranial nerve 4

Question 9

What cranial nerves lead to the diencephalon?

Answer 9

Cranial nerves 1 and 2

Question 10

What cranial nerves lead to the mid brain?

Answer 10

Cranial nerves 3 and 4

Question 11

What nerve supplies the lateral rectus muscle of the eye?

Answer 11

Cranial nerve 6- abducens

Question 12

What nerve supplies the Superior obliques of the eye?

Answer 12

Cranial nerve 4- trochlear

Question 13

What nerve supplies the inferior rectus of the eye?

Answer 13

Cranial nerve 3- oculomotor nerve

Question 14

What nerve supplies the superior rectus of the eye?

Answer 14

Cranial nerve 3- oculomotor

Question 15

Describe otitis media

Answer 15

An acute infection of the middle ear caused mainly by bacteria and associated with infections of the nose and throat

Question 16

What are the symptoms of otitis media?

Answer 16

Pain, malaise, fever, reddening and outward bulging of eardrum, possibly hearing loss and pure lent discharge from the ear

Question 17

What are the primary cause of ear infections?

Answer 17

Bacteria passing into the auditory tube from the nasopharynx

Question 18

Why are children more susceptible than adults to middle ear infections?

Answer 18

Their auditory tubes are almost horizontal, which decreases drainage

Question 19

Describe a common method of treating otitis media?

Answer 19

A surgical method called tympanotomy, consists of the insertion of a small tube into the eardrum to drain fluid from the middle ear

Question 20

What nerve supplies the mid rectus of the eye?

Answer 20

Cranial nerve 3

Question 21

What nerve supplies the inferior oblique?

Answer 21

Cranial nerve 3- oculomotor nerve

Question 22

What nerve supplies 1/3 of the taste receptors of the tongue?

Answer 22

Cranial nerve 9- glossopharyngeal

Question 23

What cranial nerve supplies 2/3 of the taste receptors of the tongue?

Answer 23

Cranial nerve 7

Question 24

What cranial nerve supplies almost all the muscles of the tongue?

Answer 24

Cranial nerve 12 hypoglossal nerve

Question 25

Describe and name the 8th cranial nerve

Answer 25

Vestibule-cochlear, sensory cranial nerve and goes to the innner ear, not leaving the skull

Question 26

Name and describe the function of the 8th cranial nerve

Answer 26

Vestibulo-cochlear nerve- sensory, hearing and balance

Question 27

What eye muscles do the abducens(cranial nerve 6) control?

Answer 27

Motor and lateral rectus muscle

Question 28

Which eye muscles are innervated by the oculomotor nerve?

Answer 28

Superior rectus, medial rectus, inferior rectus and inferior oblique

Question 29

What 3 areas of the face do the trigeminal nerve innervate?

Answer 29

Ophthalmic, Maxillary and Mandibular

Question 30

What kind of roots do the trigeminal nerve send to each area of the face?

Answer 30

Ophthalmic- sensory Maxillary- sensory Mandibular- sensory and motor

Question 31

What cranial nerve(s) exit from the midbrain?

Answer 31

Cranial nerves 3 and 4, Oculomotor and Trochlear

Question 32

What cranial nerve(s) exit from the pons?

Answer 32

Cranial nerve 5- trigeminal nerve

Question 33

What may occur due to damage to the CN VII facial nerve?

Answer 33

Bell’s palsy- dropping eye, loss of nasolabial fold, drooping corner of mouth

Question 34

What is myopia? Causes , symptoms

Answer 34

Myopia is nearsightedness, caused by an eyeball being too long relative to the focusing power of the corne and lens or lens is thicker than usual. Causes images to be formed in front of the retina, allowing only nearby objects to be seen clearly

Question 35

How can myopia be treated?

Answer 35

Treated with a concave lens

Question 36

What is farsightedness.

Answer 36

Hyperopia is farsightedness and images form behind the retina

Question 37

How is hyperopia corrected?

Answer 37

With a converging lens/ convex

Question 38

What ade some indicators of Cranial nerve 3/ oculomitor nerve damage?

Answer 38

Right eye: downward and outward gaze, dilated pupil, eyelid manually elevated due to ptosis Left: normal

Question 39

What cranial nerve exits from the pons?

Answer 39

CN-V Trigeminal nerve

Question 40

What are the 2 visual fields?

Answer 40

Nasal Temporal

Question 41

What is bitemporal hemianopsia?

Answer 41

A type of partial blindness when vision is missing on the outer halves of the eyes

Question 42

What is homonymous hemianopia?

Answer 42

This is partial blindness of the temporAl field in one eye and nasal field in the other eye

Question 43

Which cranial nerve innervates the ciliary muscles?

Answer 43

Oculomotor CN 3

Question 44

Is the facial motor or sensory?

Answer 44

Both

Question 45

What is the name of the ganglion on the facial nerve?

Answer 45

Geniculate ganglion

Question 46

What are the ganglion of the glassopharyngeal nerve?

Answer 46

Superior ganglion Inferior ganglion Optic ganglion

Question 47

What are the ganglia of the Vagus nerve?

Answer 47

Superior ganglion Inferior ganglion

Question 48

Which nerves have a ganglion/ ganglia?

Answer 48

7,9 and 10

Question 49

From where does CN VI arise?

Answer 49

The puntomedularry junction

Question 50

Where does the Vagus nerve leave the brain?

Answer 50

Medulla oblangata

Question 51

Explain the innervation of gustatory receptor cells

Answer 51

Facial nerve innervates the first 2/3 of the tongue while the glossopharyngeal innervates the posterior 1/3 of taste receptors

Question 52

What Nerve innervates almost all the muscles of the tongue?

Answer 52

The hypoglossal nerve CN 12

Question 53

What nerve is responsible for secretion from certain salivary glands?( damage to this nerve causes Bell’s Palsy

Answer 53

Facial nerve CN 7

Question 54

What nerve innervates the palatine tonsil. In addition to the carotid body and carotid sinus?

Answer 54

The Glossopharyngeal nerve

Question 55

What nerve innervates the carotid body, sinus and larynx and other structures

Answer 55

The Vagus nerve

Question 56

What 2 muscles do the accessory nerve innervates?

Answer 56

Trapezius muscle and sternocleidomastoid