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Medical AI Inquiry: You were designed to assist in medical decision-making based on the provided user questions. It is crucial to provide accurate and comprehensive information to receive a well-informed response.
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The site of lesion in Korsakoff's psychosis is :
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The correct answer is  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.