Cranial Nerves

Question 0

II

Answer 0

Optic - sight

Monocular blindness, loss of pupillary constriction, absence of blink reflex

Question 1

Cranial nerve I

Answer 1

Olfactory - smell

Anosmia (loss of smell)

Question 2

III

Answer 2

Oculomotor - muscles of the eye

Ptosis, loss of pupil dilation, loss of accommodation of light reflex

Question 3

IV

Answer 3

Trochlear - muscles of the eye

Diplopia, failure to rotate eye up and out

Question 4

V

Answer 4

Trigeminal - sensory for face, muscles for chewing

Loss of facial sensation, weakness of the muscles of mastication, deviation of opened jaw to ipsilateral side.

Question 5

VI

Answer 5

Abducens - muscles of the eye

Diplopia, convergent squint and abductor paralysis of ipsilateral eye

Question 6

VII

Answer 6

Facial - muscles of face, taste anterior 2/3 of tongue

Ipsilateral facial paralysis, dry mouth, loss of taste anterior 2/3 of the tongue (Bell’s palsy)

Question 7

VIII

Answer 7

Vestibulocochlear (auditory) - balance and hearing

Vertigo, nystagmus(rapid mov of eye), dysequilibrium, tinnitus, loss of hearing

Question 8

IX

Answer 8

Glossopharyngeal - taste posterior 1/3 of the tongue, muscles of pharynx

Slight dysphagia, partial dry mouth, loss of taste posterior third of tongue

Question 9

X

Answer 9

Vagus - internal organs

Palpitations, tachycardia, vomiting, slowing of respiration, ipsilateral paralysis of soft palate and larynx, hoarseness, anesthesia of the larynx

Question 10

XI

Answer 10

Spinal accessory - SCM and trapezius

Weakness in shrugging ipsilateral shoulder, turning head to opposite side

Question 11

XII

Answer 11

Hypoglossal - muscles of the tongue

Unilateral paralysis of the tongue