what is organic brain disease
(April 2008). Organic brain syndrome (OBS), also known as organic brain disease (OBD) Organic mental disorders organic brain disorder, is an older and nearly obsolete general term from psychiatry, referring to many physical disorders that cause impaired mental function.It does not include psychiatric disorders.hronic organic brain syndrome is long-term. For example, some forms of chronic drug or alcohol dependence can cause organic brain syndrome due to their long-lasting or permanent toxic effects on brain function.