Symptoms of a range of diseases are classed as dementia, one professor has underlined.
Professor June Andrews, of the University of Stirling, noted that while the commonest forms of dementia are Alzheimer's and vascular disease, dementia is the name given to symptoms from a range of conditions.
She continued that in Alzheimer's disease, the brain cells shrink, while in vascular disease the blood supply to the cells is stopped.
Both of these conditions result in a small part of the brain ceasing to work, she explained, but people are able to survive a long time with diminishing brain power.
"What makes dementia so sad is that after a time, which can be ten years or so, you end up having to be looked after by other people because you've lost quite a lot of brain."
Meanwhile, research published in journal Brain, Behaviour and Immunity found that regular exercise undertaken prior to the onset of damage may protect the brain from serious injury.
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