TOPICS: Neurocognitive disorders, retrograde amnesia, anterograde amnesia, delirium, dementia, Korsakoff syndrome, confabulations, thiamine (B1) deficiency, Wernicke encephalopathy, mamillary body, basal ganglia, limbic system, hippocampus, thalamus, hypothalamus, cerebral cortex, amygdala, delirium, dementia