Cranial nerves

Question 1

where does 1 pass through

Answer 1

cribiform plate

Question 2

fibres of olfactory

Answer 2

special visceral afferent fibres- sense of smell

Question 3

where does 2 pass through

Answer 3

optic canal

Question 4

fibres of optic

Answer 4

special somatic afferent fibres- vision (pupillary light reflex)

Question 5

where does 3 pass through

Answer 5

superior orbital fissure

Question 6

fibres of occulomotor

Answer 6

general somatic efferent- extra ocular muscles (except superior oblique and lateral rectus)
general visceral efferent- pupillary constrictor muscles

Question 7

Palsy of 3 causes?

Answer 7

Down and out eye

Question 8

Where does 4 pass through

Answer 8

superior orbital fissure

Question 9

fibres of trochlear

Answer 9

general somatic efferent- superior oblique only

Question 10

Three branches of trigeminal

Answer 10

Opthalmic
Maxillary
Mandibular

Question 11

opthalmic

Answer 11

general somatic afferent
sensation above lower eyelid
superior orbital fissure

Question 12

maxillary

Answer 12

general somatic afferent
sensation from lower eyelid to upper lip
foramen rotundum

Question 13

Mandibular

Answer 13

general somatic afferent- muscles of mastication
special visceral efferent- sensation below lower lip

Foramen ovale

Question 14

Where does 6 pass through

Answer 14

superior orbital fissure

Question 15

abducens fibres

Answer 15

general somatic afferent- lateral rectus only

Question 16

where does 7 pass through

Answer 16

stylomastoid foramen/ acoustic meatus

Question 17

fibres of facial

Answer 17

general somatic afferent- skin behind the ear

special visceral afferent- taste to anterior 2/3 of tongue

general visceral efferent- parasympathetic innervation of sublingual, submandibular, lacrimal glands

special visceral efferent- muscles of facial expression

Question 18

lesion of lower motor neurone of facial

Answer 18

upper and lower facial paralysis

Question 19

lesion of upper motor neurone of facial

Answer 19

lower facial paralysis only

Question 20

where does 8 pass through

Answer 20

internal auditory meatus- doesn’t leave skull

Question 21

fibres of vestibulocochlear

Answer 21

special somatic afferent fibres- hearing and balance

Question 22

where does 9 pass through

Answer 22

jugular foramen

Question 23

fibres of glossopharyngeal

Answer 23

general somatic afferent- sensation from the posterior 1/3 of the tongue, pharynx

special visceral afferent- taste to posterior 1/3 of the tongue

general visceral efferent- parasympathetic to parotid glands

special visceral efferent- motor to stylopharyngeus

Question 24

where does 10 pass through

Answer 24

jugular foramen

Question 25

fibres of vagus

Answer 25

general somatic afferent- skin around ear special visceral afferent- taste and sensation to epiglottis general visceral afferent- parasympathetic to glands of GI tract special visceral efferent- motor innervation to soft palate, pharynx, larynx

Question 26

where does 11 pass through

Answer 26

jugular foramen

Question 27

fibres of accessory

Answer 27

general somatic efferent- to trapezius and sternocleidomastoid

Question 28

Where does 12 pass through

Answer 28

Hypoglossal canal

Question 29

fibres of hypoglossal

Answer 29

general somatic efferent fibres- controlling tongue muscles

Question 30

which nerves originate from the cerebrum

Answer 30

1 & 2

Question 31

which nerve originates from the midbrain

Answer 31

4

Question 32

which nerve originates from the midbrain-pontine junction

Answer 32

3

Question 33

which nerve originates from the pons

Answer 33

5

Question 34

which nerves originate from the pontine-medulla junction

Answer 34

6,7,8

Question 35

which nerves originate from the medulla oblongata

Answer 35

9,10,11- posterior to the olive 12- anterior to the olive