Conditions resulting in thiamine deficiency and its effects include chronic alcoholism and severe malnutrition. Alcoholism may co-occur with poor nutrition, which in addition to inflammation of the stomach lining, causes thiamine deficiency. Other causes include dietary deficiencies, prolonged vomiting, eating disorders, and the effects of chemotherapy. It can also occur in pregnant women who have a form of extreme morning sickness known as hyperemesis gravidarum. Mercury poisoning can also lead to<unk> . Though it does not always co-occur, this disorder can emerge frequently as a consequential result of Wernicke's encephalopathy. PET scans show that there is a decrease of glucose metabolism in the frontal, parietal and cingulated regions of the brain in those with<unk> . This may contribute to memory loss and amnesia. Structural neuroimaging has also shown the presence of midline diencephalic lesions and cortical atrophy. Structural lesions of the central nervous system, though rare, can also contribute to symptoms of<unk> . Severe damage to the medial dorsal nucleus inevitably results in memory deficit. Additionally, autopsies of people who had<unk>  have showed lesions in both the midline and anterior thalamus, and thalamic infarctions. Bilateral infarctions to the thalamus can result in<unk> -induced amnesia as well. These findings imply damage to anterior thalamic nuclei can result in disruptive memory.
Korsakoff syndrome
Huntington's disease-like syndrome
Parkinson-plus syndrome
Sydenham's chorea
Benedikt syndrome
Dementia praecox
Catel–Manzke syndrome
Tardive dysmentia