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Dementia: Brain
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Dementia has been defined in two very different ways. The first definition, which came into use in the nineteenth century with the establishment of a nosographic framework for the psychoses, culminated in the concept of dementia praecox in the work of Emil Kraepelin. The second definition concerns altered states in memory and ideation following injury to the brain.
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Dementia may be diagnosed when two or more brain functions are impaired. These functions include language, memory, visual-spatial perception, emotional behavior or personality, and cognitive skills (such as calculation, abstract thinking, or judgment). Dementia usually appears first as forgetfulness. Other symptoms may be apparent only with neurologic examination or cognitive testing.
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Dementia is a loss of brain function. It is not a single disease. Instead, dementia refers to a group of illnesses that involve memory, behavior, learning, and communicating problems. The problems are progressive, which means they slowly get worse.
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Dementia is a progressive and degenerative disorder of the brain characterized by multiple cognitive deficits that include impairment in memory. In the early stages, it can manifest as absentmindedness or forgetfulness. The patient may forget names, or where they left their keys. Since most people occasionally forget things, these early symptoms can go unnoticed... they will become more frequent and more severe, eventually developing into other symptoms of dementia.
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Dementia is a syndrome of acquired and persistent impairment in cognition and intellectual functioning (1). When caused by certain diseases or injury, dementia is irreversible, leading to progressive brain failure and death. This Fast Fact reviews issues of prognostication in dementia.
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Dementia can ... be caused by the effect of toxins on the brain. General alcohol dementia is characterised by damage throughout the brain. Wernicke's encephalopathy and Korsakoff's syndrome are also caused by the abuse of alcohol, but the damage to the brain is more specific, particularly occurring in the frontal lobes
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