<prompt> Which one of the following is NOT a feature of Delirium?Impairment of consciousness and attentionGlobal disturbance of cognitionDisturbance of sleep-wake cycleCatastrophic reaction  <response>: D Catastrophic reaction Characteristic features of Delirium: Acute Onset New memory registration retention impaired Clouding of consciousness Disorientation in time, place person Hallucination often visual Disturb sleep wake cycle, worsening of symptoms in evening and night called sun downing Psychomotor disturbance Inform of hypo or hyperactivity. Confusion delirium was also ka acute confusional state in past Emotional disturbance Only immediate and Recent memory is disturbed in Delirium. This leads to impairment in registration Retention of new memories. Memory loss means the memory that is already registered is lost i.e. Remote memory will be lost and clearly, This is preserved in delirium. Sleep wake cycle is disturbed Paediatrics 