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Childhood dementia is an umbrella group of rare, mostly untreatable neurodegenerative disorders that show symptoms before the age of 18. These conditions cause progressive deterioration of the brain and the loss of previously acquired skills such as talking, walking, and playing.
It is an uncommon form of Alzheimer's, accounting for only 5–10% of all Alzheimer's cases. About 60% have a positive family history of Alzheimer's and 13% of them are inherited in an autosomal dominant manner. Most cases of early-onset Alzheimer's share the same traits as the "late-onset" form and are not caused by known genetic mutations.
Humans also retain a plasticity of behavior that is generally found among animals only in the young. The emphasis on learned, rather than inherited, behavior requires the human brain to remain receptive much longer. These neotenic changes may have disparate roots. Some may have been brought about by sexual selection in human evolution. In turn ...
The oldest hypothesis, on which most drug therapies are based, is the cholinergic hypothesis, which proposes that Alzheimer's disease is caused by reduced synthesis of the neurotransmitter acetylcholine. [14] The loss of cholinergic neurons noted in the limbic system and cerebral cortex, is a key feature in the progression of Alzheimer's. [39]
This is an accepted version of this page This is the latest accepted revision, reviewed on 11 February 2025. 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 ...
Compared to late onset dementia, patients with early onset dementia are more likely to have dementias other than Alzheimer's disease, although Alzheimer's is the most common etiology in either case. [13] In general, early onset dementia has a faster progression and features more extensive neurological damage when compared to late onset dementia.
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