Meaning | dementia with onset before the age of 65. |
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Narrower | Alzheimer's disease, Alzheimer's, Alzheimers | A progressive form of presenile dementia that is similar to senile dementia except that it usually starts in the 40s or 50s |
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Pick's disease | A progressive form of presenile dementia found most often in middle-aged and elderly women and characterized by degeneration of the frontal and temporal lobes with loss of intellectual ability and transitory aphasia |
Broader | dementia, dementedness | mental deterioration of organic or functional origin |
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