Technically speaking there is no such disease as dementia. The term dementia actually refers to a group of symptoms that accompany certain diseases or conditions, such as Alzheimer's disease. Various medical conditions can cause or result in dementia. Some are reversible while others can lead to more permanent states of dementia. Alzheimer's disease is the most common type of dementia but there over 200 variants. Alzheimer's accounts for about 70 per cent of all cases and affects about 5.3...

