What Is Alzheimer’s Disease?

Alzheimer’s disease is one of many dementias. It happens to be the most common dementia seen in old age. It is an irreversible, progressive brain disease. It slowly destroys brain function and leads to dementia. It is characterized by cognitive decline (e.g., memory loss, confusion and poor reasoning); behavioral and psychiatric disorders (e.g., depression, delusions, agitation); and declines in functional status (e.g., ability to perform activities of daily living and self-care).