Basics

Question 1

Olfactory: exit

Answer 1

Cribiform plate (ethmoid bone)

Question 2

Olfactory: number

Answer 2

CN 1

Question 3

CN 1: name

Answer 3

Olfactory

Question 4

Optic: function

Answer 4

Special sense: sight

Question 5

Optic: exit

Answer 5

Optic canal- sphenoid bone

Question 6

CN II: name

Answer 6

Optic

Question 7

optic: number

Answer 7

CN II

Question 8

Occulomotor: number

Answer 8

CN III

Question 9

CN III: name

Answer 9

Occulomotor

Question 10

Occulomotor: function

Answer 10

Motor- extraoccular muscles except superior oblique and lateral rectus

Question 11

Occulomotor: exit

Answer 11

Superior orbital fissure

Question 12

CN IV:name

Answer 12

Trochlear

Question 13

Trochlear: number

Answer 13

CN IV

Question 14

Trochlear: function

Answer 14

Motor: superior oblique muscle

Question 15

Trochlear: exit

Answer 15

Superior orbital fissure

Question 16

CN V: name

Answer 16

Trigeminal

Question 17

Trigeminal: number

Answer 17

CN V

Question 18

Trigeminal: branches

Answer 18

V1: ophthalmic
V2: maxillary
V3: mandibular

Question 19

Trigeminal: function

Answer 19

Sensory: skin of face and mucous membranes and sinuses

V3: also motor- muscles of mastication and tensor tympani

Question 20

Trigeminal: exit

Answer 20

V1: superior orbital fissure
V2: foramen rotundum (then superior orbital fissure)
V3: foramen ovale

Question 21

CN VI: name

Answer 21

Abducens

Question 22

Abducens: number

Answer 22

CN VI

Question 23

Abducens: function

Answer 23

Motor- lateral rectus muscle

Question 24

Abducens: exit

Answer 24

Superior orbital fissure

Question 25

CN VII: name

Answer 25

Facial

Question 26

Facial: number

Answer 26

CN VII

Question 27

What's the difference between facial nerve and CN VII?

Answer 27

"Facial nerve proper" means the motor portion. CN VII also has greater petrosal (carries parasympathetic fibres) and special sense (chorda tympani) branches before exiting skull.

Question 28

Facial: route and branches

Answer 28

Motor and sensory roots fuse (=geniculate ganglion) then gives off 3 interracial branches (greater petrosal nerves, nerve to stapedius and chorda tympani) (Exits at stylomastoid foramen) 3 motor branches (posterior auricular, nerve to digastric, nerve to stylohyoid) Then last 5 branches: - temporal - zygomatic - buccal - marginal mandibular - cervical

Question 29

CN VIII: name

Answer 29

Vestibulocochlear

Question 30

Vestibulocochlear: number

Answer 30

CN VIII

Question 31

Vestibulocochlear: function

Answer 31

Special sense: hearing (+ balance)

Question 32

Vestibulocochlear: exit

Answer 32

Internal acoustic meatus (temporal bone)

Question 33

Facial: function

Answer 33

Motor: muscles of facial expression, stapedius, post. belly of digastric, and stylohyoid Special sense: anterior 2/3 of tongue

Question 34

Glossopharyngeal: number

Answer 34

CN IX

Question 35

CN IX: name

Answer 35

Glossopharyngeal

Question 36

Glossopharyngeal: function

Answer 36

Sensory: Middle ear, eustacian tube, carotid body and sinus, oropharynx and post. 1/3 of tongue, palatine tonsils Special sense: post. 1/3 of tongue Motor: stylopharyngeus

Question 37

Glossopharyngeal: exit

Answer 37

Jugular foramen

Question 38

Vagus: number

Answer 38

CN X

Question 39

CN X: name

Answer 39

Vagus

Question 40

Vagus: function

Answer 40

Sensory: laryngopharynx, larynx, oesophagus, external ear, aortic arch and body, thoracic and abdominal viscera Motor: soft palate, pharynx, larynx, upper oesophagus

Question 41

Vagus: exit

Answer 41

Jugular foramen

Question 42

CN XI : name

Answer 42

Spinal accessory

Question 43

Spinal accessory: number

Answer 43

CN XI

Question 44

Spinal accessory: function

Answer 44

Motor: trapezius and sternocleidomastoid

Question 45

Spinal accessory: exit

Answer 45

Jugular foramen

Question 46

Hypoglossal: number

Answer 46

CN XII

Question 47

CN XII: name

Answer 47

Hypoglossal

Question 48

Hypoglossal: function

Answer 48

Motor: extrinsic and intrinsic muscles of tongue

Question 49

Hypoglossal: exit

Answer 49

Hypoglossal canal

Question 50

Olfactory: function

Answer 50

Special sense- olfaction