A19 - Middle Cranial Fossa

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 V

Answer 5

trigeminal - ophthalmic

              - maxillary 
              - mandibular

Question 6

CN VI

Answer 6

Abducent

Question 7

CN VII

Answer 7

facial

Question 8

CN VIII

Answer 8

vestibucochlear

Question 9

CN IX

Answer 9

glossalphrayngeal

Question 10

CN X

Answer 10

vagus

Question 11

CN XI

Answer 11

spinal accessory

Question 12

CN XII

Answer 12

hypoglossal

Question 13

Where does CN I exit the cranial cavity?

Answer 13

cribriform plate

Question 14

Where does CN II exit the cranial cavity?

Answer 14

optic canal

Question 15

What exits via the superior orbital fissure?

Answer 15

CN III, IV, Va, Vi

Question 16

What branch of trigeminal exits via foramen rotundrum?

Answer 16

CN Vb

Question 17

What branch of trigeminal exits via foramen ovale?

Answer 17

CN Vc

Question 18

What 2 nerves exit via the internal acoustic meatus

Answer 18

CN VII VIII

Question 19

Nerves CN IX, X and XI exit via where?

Answer 19

jugular foramen

Question 20

Where does CN XII exit the cranial cavity?

Answer 20

hypogloassal canal

Question 21

What modality does CN I have and what does it supple?

Answer 21

special sensory to smell

Question 22

What modality does CN II have and what does it supple?

Answer 22

special sensory to sight

Question 23

CN III contains somatic motor and parasympathetic fibres, what do these supply ?

Answer 23

motor - 4 muscles of the eye

parasympathetic - sphincter pupillae

Question 24

CN IV supplies the superior oblique muscle, what modality does it have?

Answer 24

somatic motor

Question 25

The ophthalmic and maxillary division of CN V contain somatic sensory fibres to what?

Answer 25

Va - skin of the upper face

Vb - skin of the mid face

Question 26

What modalities doe CN Vc have and what do they supply?

Answer 26

somatic motor - muscles of mastication

somatic sensory - skin of lower face

Question 27

Superior oblique is supplied by the motor fibres of which nerve?

Answer 27

CN VI

Question 28

What modalities doe CN V II have and what do they supply?

Answer 28

somatic motor - muscles of facial expression
somatic sensory - ear
special sensory - posterior 2/3 of the tongue
parasympathetic - submandibular/sublingual gland

Question 29

The vestibucochlear nerve supplies special sensory to?

Answer 29

balance and hearing

Question 30

The glossalpharyngeal nerve supplies what?

Answer 30

somatic motor and sensory - pharynx
special sensory - posterior 1/3 of tongue
parasympathetic - parotid gland

Question 31

What modalities doe CN X have and what do they supply?

Answer 31

somatic motor - pharynx and larynx
somatic sensory - back of the throat
special sensory - epiglotis
parasympathetic - organs of body

Question 32

What does the spinal accessory nerve supply motor innervation to?

Answer 32

sternocleidomastoid and trapezius

Question 33

CN XII suppies …. to ….

Answer 33

somatic motor

tongue

Question 34

What is the point where the optic nerves cross over =?

Answer 34

optic chiasm

Question 35

What bones make up the anterior cranial fossa?

Answer 35

frontal
ethmoid
lesser wing of the sphenoid

Question 36

What bones make up the middle cranial fossa

Answer 36

lesser wing of sphenoid

temporal bone

Question 37

What bones make up the posterior cranial fossa?

Answer 37

temporal

occipital

Question 38

What is the layer of dura which sits over the pituitary gland?

Answer 38

Diaphragm sellae

Question 39

What nerves arise in the forebrain?

Answer 39

CN I II

Question 40

Where does CN III arise

Answer 40

Midbrain

Question 41

What is the only nerve to arise in the posterior midbrain?

Answer 41

CN IV

Question 42

Where does CN V arise

Answer 42

directly from the pons

Question 43

Which nerve rises between the pons and medulla ?

Answer 43

CN VI

Question 44

Where does the facial nerve arise?

Answer 44

brainstem