The Study
Disease stage-specific atrophy markers in Alzheimer’s disease
This study watched people over time and saw that as their brains shrank in certain spots, their memory and thinking got worse. But it didn’t make anyone’s brain shrink—it just noticed a pattern. So we can say the two things are linked, but we don’t know if one causes the other.
Analysis score
Maximum 72 for a cohort study.
Where the score came from
Scientists tracked brain changes in older adults over 3 years using special MRI scans to see how the brain shrinks before and after memory problems start.
Where does this study sit?
Reviews of RCTs (Meta-analyses)
Max 100Randomized Trials
Max 90Reviews of Cohort Studies
Max 85Cohort Studies
Max 72Reviews of Case-Control Studies
Max 63Case-Control Studies
Max 58Cross-Sectional & Case Series
Max 50Expert Opinion
Max 557 / 100
Quality score
Groups of people are followed over time to see who develops an outcome. Strong for identifying risk factors and associations, but cannot prove causation as firmly as RCTs.
Key takeaways
Summary
Based on the study abstract and findings.
- 1Yes — this means MRI can detect Alzheimer’s years before memory loss, helping doctors intervene earlier with treatments.
- 2The amygdala (emotion center) starts shrinking 3 years before memory issues appear — even before the hippocampus.
- 3The parietal lobe (thinking area) shrinks fast when symptoms show up.
- 4Tracking shrinkage over time is better than single scans.
Score breakdown, methodology, conflicts of interest, evidence analysis & raw study data
Publication
Journal
medRxiv
Year
2025
Authors
H. Baumeister, Helena M Gellersen, Sarah E. Polk, René Lattmann, A. Wuestefeld, L. Wisse, Trevor Glenn, R. Yakupov, M. Stark, L. Kleineidam, S. Roeske, Barbara Marcos Morgado, H. Esselmann, F. Brosseron, Alfredo Ramírez, F. Lüsebrink, M. Synofzik, B. Schott, Matthias C. Schmid, S. Hetzer, P. Dechent, Klaus Scheffler, M. Ewers, J. Hellmann-Regen, E. Ersözlü, E. Spruth, M. Gemenetzi, K. Fliessbach, C. Bartels, A. Rostamzadeh, W. Glanz, E. Incesoy, D. Janowitz, B. Rauchmann, Ingo Kilimann, S. Sodenkamp, M. Coenjaerts, A. Spottke, O. Peters, J. Priller, Anja Schneider, J. Wiltfang, K. Buerger, R. Perneczky, S. Teipel, C. Laske, M. Wagner, G. Ziegler, F. Jessen, E. Düzel, D. Berron
Related Content
Claims (7)
In people with early Alzheimer’s disease confirmed by amyloid-beta markers, the amygdala, entorhinal cortex, and anterior hippocampus shrink faster before any detectable memory or thinking problems appear, and these structural changes can be used to identify the disease early.
In early stages of neurodegenerative disease, loss of tissue in the medial temporal lobe is linked to memory problems, while in later stages, loss of tissue in the parietal region is linked to broader thinking and processing difficulties.
In people with symptomatic Alzheimer’s disease, faster shrinkage of the precuneus and inferior parietal cortex regions of the brain is linked to a steady worsening of memory and thinking abilities over time.
In people with early-stage Alzheimer’s disease before symptoms appear, shrinkage of the amygdala is detected sooner and more reliably than shrinkage of the hippocampus, making it a more sensitive indicator for identifying the disease at its earliest stage.
Repeated MRI scans of the same individuals over time can identify brain shrinkage associated with early Alzheimer’s disease that single scans cannot detect because of natural differences in brain anatomy between people.
Tracking changes in brain shrinkage over time using multiple MRI scans shows a stronger link to worsening cognitive function than a single MRI scan taken at one point in time.
Not medical advice. For informational purposes only. Always consult a qualified healthcare professional before making health decisions.