The document discusses several types of organic mental disorders including dementia, delirium, and personality and behavioral disorders due to brain damage or disease. Dementia is characterized by decline in memory, thinking, and social functioning. Delirium involves impaired consciousness and cognition with possible psychomotor disturbances. Personality and behavioral disorders include conditions like organic personality disorder resulting from brain injury or disease. The document also lists various medical conditions that can cause or be associated with depression and other mental disorders.