a condition of handicapped intellectual operations wherein consciousness is maintained but with deprivation of intellectual comprehensibility and orientation to time, area, and occasionally the self. It might be joined by digressive or tongue-tied speech, optical hallucinations, and psychomotor dysfunctions. It can arise from an extensive assortment of causes, such as neurological wounds, injuries, poisoning, medicines, neurotransmitter unbalance, sleep dysfunctions, Alzheimer's disease, sedation, or fever.