Organic brain syndrome (OBS) is a general term used to describe decreased mental function due to a medical disease, other than a psychiatric illness. It is often used synonymously (but incorrectly) with dementia.
OBS; Organic mental disorder (OMS); Chronic organic brain syndrome
Disorders associated with OBS include:
Other conditions that may mimic organic brain syndrome include:
Symptoms can differ based on the disease. In general, organic brain syndromes cause:
Tests depend on the disorder, but may include:
Treatment depends on the disorder. Many of the disorders are treated mainly with rehabilitation and supportive care to assist the person in areas where brain function is lost.
Medications may be needed to reduce aggressive behaviors that can occur with some of the conditions.
See the specific disorder. Some disorders are short-term and treatable, but many are long-term or get worse over time.
People with OBS often lose the ability to interact with others or function on their own.
Call your health care provider if:
Knopman DS. Alzheimer's disease and other dementias. In: Goldman L, Ausiello D, eds. Cecil Medicine. 23rd ed. Philadelphia, Pa: Saunders Elsevier; 2007:chap 425.