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Alzheimer biomarkers

Amyloid, tau, neurodegeneration, imaging, CSF, and blood markers used to frame Alzheimer diagnosis, staging, and risk.

What it is

Alzheimer biomarkers are biological measurements used to frame whether Alzheimer-related brain changes are present and how the disease may be staged.[1]

Why it matters

The 2024 criteria define Alzheimer disease biologically and incorporate core biomarkers, including imaging, CSF, and validated plasma approaches.[1]

What it affects

  • Biomarkers can support diagnosis, staging, and risk framing, but they do not replace clinical interpretation or predict the fate of a single neuron.[1,2]

Interpretation traps

  • The criteria state that clinical biomarker use is presently intended for symptomatic individuals and not for cognitively unimpaired people outside research contexts.[1]

Related conditions

Can synapses be rebuilt, and can neurons be backed up?