BOF: 29
A 70-year-old male is referred by his general
practitioner as he has had a stroke. On examination the patient has left sided
complete third nerve palsy with a contralateral hemiplegia. The lesion is
likely to be in the
a)
The pons
b)
The medulla
c)
The mid-brain at the level of the inferior colliculus
d)
The mid-brain at the level of the superior colliculus
e)
The thalamus
Answer:
d)
The lesion involves the mid-brain at the level of the
superior colliculus damaging the third nerve nucleus and the cerebral
peduncles.
