Dementia is an umbrella term used to describe a group of conditions that affect how our brains work and is an overall term for a series of symptoms that are caused by disorders affecting the brain.
Dementia is caused when the brain is damaged by diseases, such as Alzheimer's disease or a series of strokes. Alzheimer's disease is the most common form of dementia but not all dementia is Alzheimer's. The specific symptoms that someone with dementia experiences will depend on the parts of the brain that are damaged and the disease that is causing the dementia.
Dementia symptoms may include memory loss and difficulties with thinking, problem-solving or language, severe enough to reduce a person's ability to perform everyday activities. A person with dementia may also experience changes in mood or behavior.