Diseases

By the age of 65, around 1% of the population suffers from dementia. The proportion increases with age, and by the age of 85, an estimated 20% have some form of dementia.

The most common cause of dementia is Alzheimer's disease, which accounts for around two-thirds of all cases. The second most common form is vascular dementia.

Alzheimer's disease is a serious and the most common form of dementia, affecting millions of people worldwide.

Vascular dementia is a form of dementia that occurs due to problems with blood flow to the brain.

Lewy body dementia is a neurological disease that affects the brain and nervous system.

Parkinson's disease is a neurological disorder that most commonly affects people over 50, but it can also affect younger individuals.

This disease occurs in people (usually under 50) who have consumed a lot of alcohol over a long period of time.

Idiopathic normal pressure hydrocephalus (iNPH) is a treatable neurological disorder that causes walking and balance difficulties, cognitive impairment and problems with bladder control.

The most common causes of dementia are Alzheimer's disease, vascular dementia and Lewy body dementia. There are also a number of very rare neurological diseases.

Less than 1% of all cases of Alzheimer's disease are due to an identified gene change. In the vast majority of cases, it is likely to be a combination of genetic, environmental and lifestyle factors.