AI Insight
Researchers have identified brain changes associated with Alzheimer's disease that occur at least seven years before amyloid plaques become visible on PET scans. The finding comes from a nearly 20-year study that repeatedly imaged the brains of healthy older adults. This early signal suggests that disease processes begin well before the characteristic plaque buildup that doctors currently use to diagnose Alzheimer's.
Why it matters
This discovery could enable earlier detection and intervention for Alzheimer's disease, potentially before irreversible damage occurs. Understanding that important disease mechanisms start before visible plaques appear may lead to new treatment strategies targeting these earlier stages of the disease.
Understand the Science
Brain changes associated with Alzheimer’s may begin at least seven years before amyloid plaques become detectable with current PET scans. Researchers uncovered the signal by tracking healthy older adults with repeated brain imaging over nearly 20 years. The discovery could help scientists identify Alzheimer’s earlier and suggests that important disease processes may start before visible plaque buildup.
Source: Alzheimer’s may leave a mark on the brain long before plaques appear