Wernicke-Korsakoff syndrome (WKS) is a type of brain disorder caused by a lack of vitamin B-1. The syndrome is actually two separate conditions that can occur at the same time. Usually, people get the symptoms of Wernicke’s encephalopathy first.Also called Wernicke’s disease, people with Wernicke’s encephalopathy have bleeding in the lower sections of the brain, including the thalamus and hypothalamus. These areas of the brain control the nervous and endocrine systems. The bleeding causes brain damage that presents symptoms involving your vision, coordination, and balance.