The term 'dementia' is used to describe the symptoms that occur when the brain is affected by specific diseases and conditions. Symptoms of dementia include loss of memory, confusion and problems with speech and understanding.
When a person with dementia finds that their mental abilities are declining, they often feel vulnerable and in need of reassurance and support. The people closest to them - including their carers, friends and family - need to do everything they can to help the person to retain their sense of identity and feelings of self-worth.
All types of dementia are progressive. This means that the structure and chemistry of the brain become increasingly damaged over time. The person's ability to remember, understand, communicate and reason gradually declines.
How quickly a dementia progress depends on the individual. Each person is unique and experiences dementia in their own way.
The way people experience dementia depends on many factors, including physical make-up, emotional resilience and the support available to them. Viewing dementia as a series of stages can be a useful way to understand the illness, but it is important to realise that this only provides a rough guide to the progress of the condition.
During the later stages of dementia most people will become increasingly frail due to the progression of the illness. They will also gradually become dependent on others for all of their care. Knowing what to expect can help everyone to prepare. It can enable the person with dementia to think about the kind of treatment and care they might want, and allows them to write an informed advance decision before they reach this stage so they can have input into how they will be cared for. It also allows carers and family to think about these aspects too.
Memory loss is likely to be very severe in the later stages of dementia. People may be unable to recognise those close to them or even their own reflection. They may no longer be