causes of chronic organic brain syndrome sometimes listed are the various types of dementia, which result from permanent brain damage due to strokes, Alzheimer's disease, or other damaging causes which are irreversible. Amnestic pertains to amnesia and is the impairment in ability to learn or recall new information, or recall previously learned information. Although similar, it is not coupled with dementia or delirium. Amnestic Amnestic conditions denotes a gray zone between delirium and dementia; its early course may fluctuate, but it is often persistent and progressive. Damage to brain functioning could be due not only to organic (physical) injury (a severe blow to the head, stroke, chemical and toxic exposures, organic brain disease, substance use, etc.) and also to non-organic means such as severe deprivation, abuse, neglect, and severe psychological trauma. Symptoms Many of the symptoms of Organic Mental Disorder depend on the cause of the disorder, but are similar and include physical or behavioral elements. Dementia and delirium are the cause of the confusion, orientation, cognition or alertness impairment. Therefore, these symptoms require more attention because hallucinations, delusions, amnesia, and personality changes are the result. These effects of the dementia and delirium are not joined with the changes of sensory or perception abilities. Memory impairment, judgment, logical function and agitation are also some extremely common symptoms. The more common symptoms of OBS are confusion; impairment of memory, judgment, and intellectual function; and agitation. Often these symptoms are attributed to psychiatric illness, which causes a difficulty in diagnosis. Associated conditions Disorders that are related to injury or damage to the brain and contribute to OBS include, but are not limited to: Alcoholism Alzheimer's disease Attention deficit/hyperactivity disorder Autism Concussion Encephalitis Epilepsy Fetal alcohol syndrome Hypoxia Parkinson's disease Intoxication/overdose caused by substance use disorders including alcohol use disorder Non-medical use of sedative hypnotics Intracranial hemorrhage/trauma Korsakoff syndrome Mastocytosis Meningitis Psychoorganic syndrome Stroke/transient ischemic attack (TIA) Withdrawal from drugs, especially sedative hypnotics, e.g. alcohol or benzodiazepines Other conditions that may be related to organic brain syndrome include: clinical depression, neuroses, and psychoses, which may occur simultaneously with the OBS. Treatment While the treatment depends on which particular disorder is involved in Organic Mental Disorder, a few that are possible. Treatments can include, but are not limited to, rehabilitation therapy such as physical or occupational, pharmacological modification of the neurotransmitter function, or medication. The affected parts of the brain can recover some function