QuestionSBA
QuestionChoice
This is incorrect, the abducens nerve (CN VI) is responsible for innervating the lateral rectus muscle of the eye. CN VI palsy results in horizontal diplopia when attempting to abduct the affected eye.
10025841
b
CN VI
QuestionChoice
This is correct. The patient is presenting with a facial nerve (CN VII) palsy. The facial nerve is responsible for motor innervation of the muscles of facial expression, as well as lacrimation and taste from the anterior 2/3 of the tongue.
10025840
a
CN VII
QuestionChoice
This is incorrect, the trigeminal nerve (CN V) is responsible for facial sensation and innervation of the muscles of mastication. Damage to this cranial nerve can cause trigeminal neuralgia, loss of facial sensation and loss of the corneal reflex.
10025842
c
CN V
QuestionChoice
This is incorrect, the vestibulocochlear nerve (CN VIII) is responsible for hearing and balance. Patients with damage to this cranial nerve commonly present with hearing loss and vertigo.
10025843
d
CN VIII
QuestionChoice
This is incorrect. The hypoglossal nerve (CN XII) is responsible for tongue movement; a lesion in CN XII would present with tongue deviation to the side of the lesion, as well as tongue wasting.
10025844
e
CN XII
Concept
Chapter
2693
4303
Facial nerve palsy
Topic
141
Neurology
17566
A 33 year old man presents to the GP as his friends noticed some changes to the appearance of his face. On examination, he has left-sided ptosis, loss of the nasolabial fold and drooping of the left side of the mouth. Motor function on the right side of his face is intact. Sensation is unaffected bilaterally

Which of the following cranial nerves is most likely implicated in this presentation?
a