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1. AWernicke encephalopathy, caused by acute thiamine deficiency affecting periaqueductal grey and mammillary bodies
2. BHepatic encephalopathy, caused by accumulation of ammonia and other gut-derived neurotoxins
3. CDelirium tremens, caused by sudden withdrawal of alcohol after sustained heavy daily consumption
4. DCentral pontine myelinolysis, caused by overly rapid correction of chronic hyponatraemia
5. EKorsakoff syndrome, caused by chronic thiamine deficiency producing a fixed anterograde amnesic and confabulatory state