CRANIAL NERVE DISORDERS

Question 1

sinus conditions, head trauma, smoking, aging,

and the use of cocaine and in Parkinson disease

Answer 1

olfactory

Question 2

blurred margins
(papilledema); pallor (optic atrophy); and cup enlargement (glaucoma)

Glaucoma, retinal emboli, optic neuritis (visual acuity poor)

Bitemporal hemianopsias

Homonymous hemianopsias or quadrantanopsia in postchiasmal
lesions`

Answer 2

optic

Question 3

worsened aniscoria with ptosis and ophthalmoplegia

Horner’s syndrome and simple anisocoria.

Answer 3

Optic and Oculomotor

Question 4

Monocular diplopia

Binocular diplopia

eye muscle disease from myasthenia gravis, trauma, thyroid ophthalmopathy, and internuclear ophthalmoplegia

nystagmus

Answer 4

Oculomotor, Trochlear, Abducens

Question 5

Look for unilateral weakness in CN V pontine lesions;
§ Bilateral weakness in bilateral hemispheric disease

Difficulty clenching the jaw or moving it to the opposite side occurs in masseter and lateral pterygoid weakness

Answer 5

Trigeminal - Motor

Question 6

trigeminal neuralgia

acoustic neuroma

Answer 6

Trigeminal – Sensory

Question 7

Bell’s palsy

Answer 7

Facial

Question 8

oExcess cerumen, otosclerosis, and otitis media cause conductive
hearing loss;
o presbyacusis from aging commonly reflects sensorineural hearing loss.
o Vertigo with hearing loss and nystagmus typifies Ménière’s disease

Answer 8

Vestibulocochlear

Question 9

bilateral lesion of CN X

Unilateral absence of this reflex suggests a lesion of CN IX, and perhaps CN X

Answer 9

Glossopharyngeal and Vagus

Question 10

Trapezius weakness with atrophy and fasciculations indicates a peripheral nerve disorder

Answer 10

Spinal Accessory

Question 11

Tongue atrophy and fasciculations occur in amyotrophic lateral
sclerosis, and polio

Answer 11

Hypoglossal