Cranial Fossa & Nerves

Question 1

Middle meningeal artery

Answer 1

Foramen spinosum

Question 2

Mandibular division of trigeminal nerve

Answer 2

Foramen ovale

Question 3

the small meningeal branches of the ascending pharyngeal artery and emissary veins from the cavernous sinus

Answer 3

Foramen lacerum

Question 4

Spinal cord

Answer 4

Foramen magnum

Question 5

Cranial nerves IX, X, and XI

Answer 5

Jugular foramen

Question 6

Where are the foramen spinosum, lacerum and ovale?

Answer 6

Middle fossa

Question 7

Where are the foramen magnum and jugular foramen?

Answer 7

Posterior fossa

Question 8

Sensory vs motor component of Pupillary light reflex

Answer 8

S = optic
M = oculomotor

Question 9

Sensory vs motor component of Accommodation reflex

Answer 9

S = optic
M = oculomotor

Question 10

Sensory vs motor component of jaw jerk

Answer 10

S = trigeminal
M = trigeminal

Question 11

Sensory vs motor component of corneal reflex

Answer 11

S = trigeminal
M = facial

Question 12

Sensory vs motor component of vestibuloocular reflex

Answer 12

S = Vestibulocochlear
M = Oculomotor, trochlear, abducent

Question 13

Sensory vs motor component of gag reflex

Answer 13

S = Glossopharyngeal
M = vagus

Question 14

CN 1 Olfactory nerve

Answer 14

Cribiform plate

Question 15

CN2 optic nerve

Answer 15

optic canal

Question 16

CN 3 oculomotor nerve, CN4 trochlear nerve and CN 6 abducens

Answer 16

Superior orbital fissure

Question 17

CN 5 trigeminal nerve

Answer 17

V1: SOF
V2: Foramen rotundum
V3: Foramen ovale

Question 18

CN 7 facial nerve and CN 8 vestibulocochlear nerve

Answer 18

Internal auditory meatus

Question 19

CN 9 glossopharyngeal nerve, CN 10 vagus, CN 11 accessory

Answer 19

Jugular foramen

Question 20

CN 12 hypoglossal nerve

Answer 20

Hypoglossal canal

Question 21

Palsy results in
ptosis
‘down and out’ eye
dilated, fixed pupil

Answer 21

CN 3 Oculomotor

Question 22

Palsy results in defective downward gaze → vertical diplopia

Answer 22

CN 4 Trochlear

Question 23

Lesions may cause:
trigeminal neuralgia
loss of corneal reflex (afferent)
loss of facial sensation
paralysis of mastication muscles
deviation of jaw to weak side

Answer 23

CN 5 Trigeminal

Question 24

Palsy results in defective abduction → horizontal diplopia

Answer 24

CN 6 Abducens

Question 25

Lesions may result in: flaccid paralysis of upper + lower face loss of corneal reflex (efferent) loss of taste hyperacusis

Answer 25

CN 7 facial

Question 26

Hearing loss Vertigo, nystagmus Acoustic neuromas are Schwann cell tumours of the cochlear nerve

Answer 26

CN 8 vestibulocochlear

Question 27

Lesions may result in; hypersensitive carotid sinus reflex loss of gag reflex (afferent)

Answer 27

CN 9 Glossopharyngeal

Question 28

Lesions may result in; uvula deviates away from site of lesion loss of gag reflex (efferent)

Answer 28

CN 10 vagus

Question 29

Lesions may result in; weakness turning head to contralateral side

Answer 29

CN 11 accessory

Question 30

Tongue deviates towards side of lesion

Answer 30

CN 12 hypoglossal