The site of lesion in Korsakoff's psychosis is :: (A) Frontal lobe, (B) Corpus striatum, (C) Mammilary body, (D) Cingulate gyms
Answer is C. Wernicke's encephalopathy : Thalamus, mammillary bodies, midline cerebellum, periaqueductal gray matter of midbrain, and peripheral nerves.
Korsakoff's syndrome : Atrophy of Mammillary body, medial thalamic nuclei, and hippocampus.