Dementia is a general term for any disease that causes a change in memory and/or thinking skills that is severe enough to impair a person’s daily functioning (driving, shopping, balancing a checkbook, working, communicating, etc.). Most types of dementia cause a gradual worsening of symptoms over the course of years due to progressive damage to nerve cells in the brain caused by the underlying disease process, which is referred to as neurodegeneration.
The symptoms of dementia vary from person to person and may include memory problems or mood changes or difficulty walking, speaking or finding your way. While dementia may include memory loss, memory loss by itself does not mean that you have dementia. While some mild changes in cognition are considered a part of the normal aging process, dementia is not.