 [ Symptoms ] insomnia, dementia, depression, disorientation, problems with coordination, overactive reflexes, slow bodily movement, personality change, mental confusion, delusion, rapid involuntary eye movement, inability to understand language, lack of concentration, inability to speak language, amnesia, apathy, rhythmic muscle contractions, jerking muscle spasms, blurred vision, hallucination, anxiety, difficulty speaking [ Disease ] Creutzfeldt-Jakob disease