Alzheimer’s disease is the most common form of dementia, with around 60% of all dementia being caused by Alzheimer's disease.
It is a physical disease affecting the brain. During the course of the disease ‘plaques’ and ‘tangles’ develop in the structure of the brain, leading to the death of brain cells.
Alzheimer’s is a progressive disease, which means that gradually, over time, more parts of the brain are damaged. This leads to severe memory loss, including not understanding what time of day it is, or knowing what day, month or even year it is.