LYCOS RETRIEVER
Dementia: People
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Dementia is a condition characterized by a chronic decline in cognitive functions contrasted with a person's usual state of functioning. It is seen most often in people sixty-five years and older, and the incidence increases with age. Dementia occurs in a stable level of consciousness and sensorium, unlike delirium. There are various causes and types of dementia, but they have certain characteristics in common. Persons with dementia often have problems with short-term memory, such as forgetting names and recent events. They may have trouble with visuospatial processing, such as getting lost in familiar places.
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Dementia is the loss of mental abilities and most commonly occurs late in life. Of all persons over age 65, 5-8% are demented. This percentage increases considerably with age. Twenty-five to 50% of people over 85 are affected (Table1).
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Dementia usually affects older people and becomes more common with age. About 6 in 100 of those over the age of 65 will develop some degree of dementia, increasing to about 20 in 100 of those over the age of 85. Dementia can develop in younger people but is less common, affecting about 1 in 1,000 of those under 65.
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Dementia usually only affects people over 65 years of age. Less than two per cent of people between 65 and 69 years of age suffer from dementia, five per cent between 75 and 79 years old, 20% of people between 85 and 89, and about one in three, or 33% of people over the age of 90 suffer from moderate or severe dementia.
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Dementia can be difficult to understand, especially for young people. It will help if dementia can be explained clearly and simply, so that the causes and issues involved may be better understood by young people.
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A number of environmental factors have been put forward as possible contributory causes af Dementia in some people. The main sympothms of Dementia are progressive decling of memory and other higher mental functions.
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