Mice show altered brain rhythms before Alzheimer’s plaques form
Brain recordings in a mouse model of Alzheimer’s disease detected altered fast and slow rhythms at 1 month, without plaques or nerve-cell loss.
Our read
Biomarkers- Studied:
- Experiments in 5XFAD and wild-type mice, against wild-type mice
- What changed:
- At 1 month, plaque-free model mice had less low-frequency and more high-frequency brain activity than control mice
- The catch:
- Brain recordings measured rhythm changes, not the signals’ accuracy for detecting early Alzheimer’s disease
Editor of record: Boris Djordjevic · AgingResearch.News
5XFAD mice, a model of Alzheimer’s disease, underwent recordings of electrical activity inside the brain in an animal experiment at 1 month, 3–4 months and 10–12 months. Researchers compared them with control mice.
At 1 month, the model mice had less low-frequency activity and more high-frequency activity. The strength of some high-frequency activity was also more closely tied to the timing of slower rhythms. These young mice had detectable amyloid-beta, a protein that can form plaques, but no plaques, brain inflammation or loss of nerve cells. At 3–4 months, the model mice showed similar shifts in brain rhythms, alongside seizures. At 10–12 months, their brain-wave patterns showed no consistent differences from those of age-matched controls.
Why it matters
Alzheimer’s disease disrupts communication across brain networks. The authors suggest that combining the strength of fast rhythms with their timing relative to slower rhythms could offer markers of its earliest stages.
Caveats
These were brain-recording measurements in a mouse model; they do not establish how well the signals would identify early Alzheimer’s disease in people.
The paper
Universidad Politécnica de Madrid; Biomedical Research Networking Center in Bioengineering, Biomaterials and Nanomedicine
Neurobiology of Disease, Jun 11, 2026, Open access
Comments
Be the first to comment.