<prompt> Cognitive disordres areIntellectualizationDepersonilizationDementiaAll  <response>: C i.e. Dementia - Cognitive or higher mental functions i.e. abstract thinkingQ, concentration, memory, intelligence, orientation, consciousnessQ are disturbed in organic brain syndromesQ le delirium, dementia or organic amnestic syndromeQ. Impaired cognitive functions with delusions hallucinations indicate towards diagnosis of delirium. 