Alcoholism[5] Alzheimer's Disease Attention deficit/hyperactivity disorder[6] Autism[6] Concussion Encephalitis Epilepsy Fetal alcohol syndrome Hypoxia Parkinson's disease[6] Intoxication/overdose caused by drug abuse including alcoholism Sedative hypnotic dependence and drug abuse[3] Intracranial hemorrhage/trauma Korsakoff Syndrome Mastocytosis[7] Meningitis Psychoorganic syndrome Stroke/transient ischemic attack (TIA) Withdrawal from drugs, especially sedative hypnotics, e.g. alcohol or benzodiazepines[8][9]