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#399 ‒ The evolution of Alzheimer's disease and dementia care: how early detection, personalized treatment, new therapies, and a multimodal approach are changing the landscape | Gayatri Devi, M.D.
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Alzheimer's disease within the dementia spectrum
At 12:44 · chapter starts 7:15
Dementia is the umbrella term for progressive brain cell connectivity loss; Alzheimer's is its most common form, defined by amyloid plaques, tau tangles, and increasingly recognized neuroinflammation in microglial cells [1] — Gayatri Devi "Alzheimer's and other dementias exist on a wide spectrum — from barely detectable impairment to rapid severe decline — and the disease's pr…" 05:13 . Gayatri Devi unpacks why diagnosis is so difficult: people with high intelligence and large cognitive reserves can compensate remarkably well, appearing cognitively intact even with moderate or severe underlying pathology. She describes multiple Alzheimer's subtypes — some primarily affecting memory, others visual-spatial processing — depending on the brain region most affected. Comorbid conditions like TDP-43 pathology or Lewy body disease further complicate the picture. The section raises a central diagnostic debate: whether Alzheimer's should be diagnosed on biomarkers alone or require biomarkers plus clinical symptoms.
The classic amyloid-first model of Alzheimer's pathology is being overturned. Neuroimmunological changes may precede amyloid deposition by years or decades, opening a window for anti-inflammatory intervention as early as your 30s and 40s to prevent the entire cascade from triggering.
Amyloid deposition can begin two to three decades before the onset of clinical cognitive symptoms.
