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Wernicke-Korsakoff syndrome (WKS) is the combined presence of Wernicke encephalopathy (WE) and alcoholic Korsakoff syndrome (AKS [clarification needed]). Due to the close relationship between these two disorders, people with either are usually diagnosed with WKS as a single syndrome. It mainly causes vision changes, ataxia and impaired memory. [2]
The condition is part of a larger group of thiamine deficiency disorders that includes beriberi, in all its forms, and alcoholic Korsakoff syndrome. When it occurs simultaneously with alcoholic Korsakoff syndrome it is known as Wernicke–Korsakoff syndrome. [3] [4]
Korsakoff syndrome (KS) [1] is a disorder of the central nervous system characterized by amnesia, deficits in explicit memory, and confabulation. This neurological disorder is caused by a deficiency of thiamine (vitamin B 1 ) in the brain, and it is typically associated with and exacerbated by the prolonged, excessive ingestion of alcohol . [ 2 ]
[1] [6] In rare cases, it may be due to a genetic condition that results in difficulties absorbing thiamine found in food. [1] Wernicke encephalopathy and Korsakoff syndrome are forms of dry beriberi. [6] Diagnosis is based on symptoms, low levels of thiamine in the urine, high blood lactate, and improvement with thiamine supplementation. [9]
A nutritional vitamin deficiency state that is caused by thiamine deficiency which is seen most commonly in alcoholics leads to Wernicke's encephalopathy and Alcoholic Korsakoff syndrome (AKS) which frequently occur simultaneously, known as Wernicke–Korsakoff syndrome (WKS).
Wernicke encephalopathy: an acute neurological syndrome of ophthalmoparesis, ataxia, and encephalopathy brought on by thiamine deficiency. Wernicke–Korsakoff syndrome , also called Korsakoff psychosis : a subacute dementia syndrome, often following Wernicke encephalopathy, characterized clinically by confabulation and clinicopathologically ...
Well-known disorders caused by thiamine deficiency include beriberi, Wernicke–Korsakoff syndrome, optic neuropathy, Leigh's disease, African seasonal ataxia (or Nigerian seasonal ataxia), and central pontine myelinolysis. [5] [16] Symptoms include malaise, weight loss, irritability and confusion. [5] [13] [17] [18]
Transketolase activity decreases due to thiamine deficiency, generally due to malnutrition. Several diseases are associated with thiamine deficiency, including beriberi, biotin-thiamine-responsive basal ganglia disease (BTBGD), [5] Wernicke–Korsakoff syndrome, and others (see thiamine for a comprehensive listing).