Apathy in an otherwise healthy older person doubles their risk of Alzheimer's, which means the disease changes behaviour long before it touches cognition.

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• The slowness of Parkinson's disease may be a failure of motivation to act rather than of motor control, which is why a patient can still run from a burning house. MHMasud Husain24 Aug 2026motivationdementia
• About half of all dementia is preventable, and most of that preventable half is Alzheimer's disease and vascular dementia. TWTommy Wood20 Jul 2026dementia
• Alzheimer's disease and dementia are not the same thing: a fifth to a third of people whose brains carry the pathology never became demented. MHMasud Husain24 Aug 2026dementia
• Alzheimer's pathology in the brain does not settle whether a person has dementia: the nuns' brains were full of plaques and tangles while they went on functioning normally. ACAlan Castel13 Jul 2026dementia
• As people live longer by caring for their bodies, dementia will claim larger and larger numbers RBRoy Baumeister27 May 2023dementia

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