B7.033 Large Group: Pupils Flashcards
1
Q
what is parinaud’s syndrome
A
dorsal midbrain syndrome
2
Q
features of dorsal midbrain syndrome
A
large pupils that do not react to light
impairment of upgaze
eyelid abnormalities (bilateral lid retraction)
impaired convergence
3
Q
etiologies of dorsal midbrain syndrome
A
pineal region tumors
hydrocephalus
MS
vascular disease of pretectal area
4
Q
where is an uncal transtentorial herniation
A
brain herniates over tentorium cerebelli (sheath between cortex and cerebellum) and compresses into midbrain
5
Q
what is a way to treat a brain herniation without medical equipment
A
force hyperventilation to make the patient alkalotic and constrict blood vessels, preventing more blood flow
