Dementia is a medical condition that alters the way the brain works.
AD affects the parts of the brain that control thought, memory and language.
Though every day scientists learn more about AD, the cause of the disease is still unknown, and there is no cure. Symptoms of Alzheimer's include forgetting how to do simple tasks, like brushing their teeth or combing their hair. They can no longer think clearly and they begin to have trouble speaking, understanding, reading or writing. People with AD may become aggressive and wander away from home. More than 50 percent of people with Alzheimer's disease experience anxiety and depression.