Cranial Nerve Lesions

Question 1

What cranial nerves form brainstem pathologies

Answer 1

CN3-CN12

Question 2

What does CN3 lesion cause (Occulomotor)

Answer 2

Ptosis (Upper eyelid droop)
-Down and out eye
-Fixed Dilated pupil

Question 3

What does CN4 Lesion cause (Trochlear)

Answer 3

Diplopia when looking down
-Trauma cause

Caused by trauma

Question 4

What does CN6 Lesion cause (Abducens)

Answer 4

Adducted eye (Raised ICP)

Question 5

What three CN Lesions affect the eyes

Answer 5

3/4/6

Question 6

What does CN5 lesion cause (Trigeminal)

Answer 6

Jaw deviation and pain
Lost corneal reflex
Trigeminal Neuralgia

Question 7

What does CN7 Lesion cause (Facial)

Answer 7

No forehead sparing Facial droop
- Bells Palsy
- Parotid Inflammation

Question 8

What does CN8 Lesion cause (Vestibulocochlear)

Answer 8

Hearing loss
Balance loss
Skull change (Pagets)

Question 9

What does CN9/10 Lesion cause (Glosso and Vagus)

Answer 9

Impaired gag reflex w/ swallow/ resp and vocal issue

Jugular foramen lesion

Question 10

What does CN11 Lesion cause (Accessory)

Answer 10

Cant shrug shoulder or turn head against resistance

Question 11

What does CN12 Lesion cause (Hypoglossal)

Answer 11

Tongue deviation to lesion side

Question 12

Frontal lobe lesion signs (CAB)

Answer 12

Cant list
Anosmia
BROCCA’S APHASIA

Question 13

What is Brocca’s Aphasia (Inf. frontal gyrus)

Answer 13

Jolted speech
-Can understand

Question 14

Parietal lobe lesion signs (SIGAA)

Answer 14

Sensory inattention
Inf. Hom. quadrantonopia
Gerstmann’s syndrome
Apraxia
Asterogenesis

Question 15

What is astereogenesis

Answer 15

Can’t identify with touch

Question 16

Temporal lobe lesion signs (PAWS)

Answer 16

Prosopagnosia (can’t recognise face)
Auditory agnosia
Wernicke’s aphasia
Sup. Hom. Quadrantanopia

Question 17

What is Wernicke’s aphasia

Answer 17

Fluent Jumble
-Can’t understand

Question 18

Inferior homonymous quadrantanopia is caused by lesion of what lobe

Answer 18

Parietal

Question 19

Occipital lobe lesion signs

Answer 19

Macular sparing homonymous hemianopia
Cortical blindness
Visual agnosia
!No nystagmus and adduction issues!

Question 20

Cerebellum lesion signs (GAIN)

Answer 20

GAIT and truncal ATAXIA
Intention tremor
Nystagmus

Question 21

Nystagmus is found in what lobe lesion

Answer 21

Cerebellum

Question 22

What is dysarthria

Answer 22

Slurred speech
-Can understand

Question 23

What is Conduction Aphasia

Answer 23

Fluent with errors
-Understands
-Can’t repeat
Lesion at arcuate fasciculcus

Question 24

Lesion where causes conduction aphasia (Can’t repeat)

Answer 24

Arcuate Fasciculcus

Question 25

What does the facial nerve, CN7 supply

Answer 25

Face Ears Taste Tears

Question 26

What feature of the face does CN7 Innervate

Answer 26

Expression

Question 27

What branch of CN7 supplies the ear

Answer 27

Stapedius nerve

Question 28

What does CN7 control for taste

Answer 28

Anterior 2/3 tongue

Question 29

How does CN7 control tears

Answer 29

Send parasympathetic fibres to lacrimal glands by greater petrosal

Question 30

What are the three branches of CN7

Answer 30

Greater petrosal Stapedius Chorda tympani

Question 31

What are the bilateral causes of CN7 Palsy

Answer 31

Sarcoidosis Guillian Barre Lyme disease Neurofibramatosis 2`

Question 32

What are the unilateral non forehead sparing causes of CN7 Palsy

Answer 32

Bells HZV and HIV Neuroma/Parotid tumour Multiple sclerosis Diabetes

Question 33

In what disease is there forehead sparing CN7 palsy

Answer 33

Stroke

Question 34

What are the three types of nerve injury

Answer 34

Neuropraxia Axonetmesis Neurotmesis