Lecture 8- Summaries of the cranial nerves

Question 1

CN I

Answer 1

olfactory

Question 2

CN II

Answer 2

optic

Question 3

CN III

Answer 3

oculomotor

Question 4

CN IV

Answer 4

trochlear

Question 5

CN Va

Answer 5

opthalmic branch of trigeminal

Question 6

CN Vb

Answer 6

maxillary branch of trigeminal

Question 7

CN Vc

Answer 7

mandibular branch of trigeminal

Question 8

CN VI

Answer 8

abducens

Question 9

CN VII

Answer 9

facial

Question 10

CN VIII

Answer 10

vestibulocochlear

Question 11

CN IX

Answer 11

glossopharyngeal

Question 12

CN X

Answer 12

vagus

Question 13

CN XI

Answer 13

spinal accessory

Question 14

CN XII

Answer 14

hypoglossal

Question 15

where does the olfactory nerve (CN I) exit

Answer 15

cribriform plate

Question 16

where does the optic nerve (CN II) exit

Answer 16

optic canal

Question 17

where does the oculomotor nerve (CN III) exit

Answer 17

Superior orbital fissure

Question 18

where does the trochlear nerve (CN IV) exit

Answer 18

Superior orbital fissure

Question 19

where does the Opthalmic branch trigeminal nerve (CN Va) exit

Answer 19

Superior orbital fissure

Question 20

where does the maxillary branch trigeminal nerve (CN Vb) exit

Answer 20

foramen rotundum

Question 21

where does the mandibular branch trigeminal nerve (CN Vc) exit

Answer 21

foramen ovale

Question 22

where does the trochlear nerve (CN VI) exit

Answer 22

Superior orbital fissure

Question 23

where does the facial nerve (CN VII) exit

Answer 23

internal acoustic meatus > stylomastoid f.

Question 24

where does the vestibulocochlear nerve (CN VIII) exit

Answer 24

internal acoustic meatus

Question 25

where does the glossopharyngeal nerve (CN IX) exit

Answer 25

jugular f.

Question 26

where does the vagus nerve (CN X) exit

Answer 26

jugular f.

Question 27

where does the spinal accessory (CN X) exit

Answer 27

jugular f.

Question 28

where does the hypoglossal nerve (CN XII) exit

Answer 28

hypoglossal canal

Question 29

modality of olfactory (CN I)

Answer 29

``` sensory SVS (special visceral sensory) - smell ```

Question 30

modality of optic (CN II)

Answer 30

``` sensory SSS (special somatic sensory) - vision ```

Question 31

modality of oculomotor (CN III)

Answer 31

Motor (GSM & GVM) - general somatic motor (skeletal muscles) --> 4 extrinsic eye muscles and levator palpebrae superioris. - general visceral motor (muscles derived from pharyngeal arches) - -->pupillary sphincter

Question 32

modality of trochlear (CN IV)

Answer 32

motor (GSM) - general somatic motor - superior oblique is a pulley-like structure in the eye.

Question 33

modality of opthalmic branch of the trigmeninal (CN Va)

Answer 33

GSS (general sensation from skin) - general somatic sensory - Scalp, forehead and nose

Question 34

modality of maxillary branch of the trigmeninal (CN Vb)

Answer 34

GSS | - cheeks, lower eye lid, nasal mucosa, upper lid, upper teeth and palate

Question 35

modality of mandibular branch of the trigmeninal (CN Vc)

Answer 35

GSS - anteiror 2/3 of tongue, skin over mandible and lower teeth SVM (special visceral motor) - muscles of mastication

Question 36

modality of abducens (CN VI)

Answer 36

motor GSM | - lateral rectus (The lateral rectus muscle is a muscle on the lateral side of the eyeball in the orbit.)

Question 37

modality of Facial (CN VII)

Answer 37

GSS SVS SVM GVM

Question 38

GSS of the facial nerve

Answer 38

sensation to part of ext. ear. | SVS: taste from ant. 2/3 tongue, hard and soft palate.

Question 39

SVS of the facial nerve

Answer 39

taste from ant. 2/3 tongue, hard and soft palate.

Question 40

SVM of the facial nerve

Answer 40

muscles of facial expression.

Question 41

GVM of the facial nerve

Answer 41

lacrimal, submandibular, sublingual glands and mucous glands of mouth and nose.

Question 42

modality of Vestibulocochlear (CN VIII)

Answer 42

sensory SSS | - Hearing and balance

Question 43

modality of the glossopharyngeal (CNIX)

Answer 43

Both: GSS GVS SVS GVM SVM

Question 44

GSS of the glossopharyngeal nerve

Answer 44

post. 1/3 tongue, ext. ear, and middle ear cavity.

Question 45

GVS of the glossopharyngeal nerve

Answer 45

carotid body and sinus.

Question 46

SVS of the glossopharyngeal nerve

Answer 46

taste from post. 1/3 tongue.

Question 47

GVM of the glossopharyngeal nerve

Answer 47

parotid gland.

Question 48

SVM of the glossopharyngeal nerve

Answer 48

stylopharyngeus

Question 49

modality of Vagus (CN X)

Answer 49

Both: GSS GVS SVS GVM SVM

Question 50

GSS of the vagus nerve

Answer 50

ext. ear, larynx and pharynx.

Question 51

GVS of the vagus nerve

Answer 51

larynx, pharynx and, thoracic & abdominal viscera.

Question 52

SVS of the vagus nerve

Answer 52

taste from epiglottis region of tongue

Question 53

GVM of the vagus nerve

Answer 53

smooth muscles of pharynx, larynx and most of the GIT.

Question 54

SVM of the vagus nerve

Answer 54

most muscles of pharynx and larynx.

Question 55

modality of spinal accessory (CN XI)

Answer 55

Motor (GSM & SVM) GSM: trapezius and sternocleidomastoid. SVM: a few fibres run with CNX to viscera.

Question 56

modality of Hypoglossal (CN XII)

Answer 56

Motor (GSM) Intrinsic and extrinsic tongue muscles (except the palatoglossus).