Alcoholic damage to the cerebellum affects the anterior vermis only and presents with gait ataxia.
Wernicke encephalopathy can show lesions in a few areas but most common is #1 mammillary body, #2 dorsomedial nuclei of thalamas.. It may also damage the anterior group nuclei, hippocampus and vermis as well but the first two I would say are most important..
WE presents with eye problems (ocular palsies), confusion and gait ataxia acutely and may also progress to include Korsakoff Psychosis which consists of anterograde + retrograde amnesia, and confabulations (if you can't remember anything then you just make everything up )).. At this point it is known as Wernicke-Korsakoff Syndrome
And also there is damage to periaqueductal gray matter in wernicke's. Thats why ocular palsies occur.
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