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This is an accepted version of this page This is the latest accepted revision, reviewed on 24 December 2024. Long-term brain disorders causing impaired memory, thinking and behavior This article is about the cognitive disorder. For other uses, see Dementia (disambiguation). "Senile" and "Demented" redirect here. For other uses, see Senile (disambiguation) and Demented (disambiguation). Medical ...
Early onset dementia is a general term that describes a group of conditions featuring progressive cognitive decline, particularly in the domains of executive function, learning, language, memory, or behavior. This condition may occur due to various different causes, including degenerative, autoimmune, or infectious processes.
The term dementia praecox was first used by German psychiatrist Heinrich Schüle in 1880. [1] It was also used in 1891 by Arnold Pick (1851–1924), a professor of psychiatry at Charles University in Prague. [2] In a brief clinical report, he described a person with a psychotic disorder resembling "hebephrenia" (an adolescent-onset psychotic ...
The term senile dementia of the Alzheimer type (SDAT) was used for a time to describe the condition in those over 65, with classical Alzheimer's disease being used to describe those who were younger. Eventually, the term Alzheimer's disease was formally adopted in medical nomenclature to describe individuals of all ages with a characteristic ...
The main principle distinguishing neurocognitive disorders from mood disorders and other psychiatric conditions that involve a cognitive component (i.e. increased lapses in memory noted by patients with depression) is that cognitive decline is the "defining characteristic" of the disorder.
Dementia can be categorized as reversible (e.g. thyroid disease) or irreversible (e.g. Alzheimer's disease). [12] Currently, there are more than 35 million people with dementia worldwide. In the United States alone the number of people affected by dementia is striking at 3.8 million. [13]
Early-onset Alzheimer's disease (EOAD), also called younger-onset Alzheimer's disease (YOAD), [1] is Alzheimer's disease diagnosed before the age of 65. [2] It is an uncommon form of Alzheimer's, accounting for only 5–10% of all Alzheimer's cases.
The international medical condition classification system, the ICD, greatly changed the way it categorised autism-related conditions in 1978, with the release of the ICD-9. " Infantile autism " (299.0) was now recognised as a condition, with separate sub-categories for it having a "current or active state" or "residual state".
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