Which of the following is an example of an organic disorder?

Dementia is an example of an organic disorder because it is primarily caused by physical changes in the brain. Organic disorders, also known as physiological or biological disorders, typically involve identifiable biological or physiological factors that contribute to the condition. In the case of dementia, these changes can include neurodegeneration, vascular issues, or the accumulation of proteins in the brain, all of which can be observed through imaging studies or biopsies.

In contrast, anxiety disorders, depressed mood, and schizophrenia are often classified as functional disorders. These conditions may be influenced by a combination of genetic, psychological, and environmental factors, but they do not have the same clear-cut physical changes in brain structure or function that characterize organic disorders. While they are valid mental health issues that require assessment and treatment, their underlying mechanisms differ fundamentally from those seen in dementia.