Magnetoencephalography split 263 people with depression into five brain-connectivity profiles

What the research found

Study (brain recordings, not a treatment trial). ScienceDaily carried the University of Helsinki account on 9 October 2026. Wenya Liu, Satu Palva, J. Matias Palva, and colleagues report in Nature Mental Health (2026; 4(10):1534; doi 10.1038/s44220-026-00723-4), with Aalto University and Helsinki and Uusimaa Hospital District. Researchers recorded magnetoencephalography in 263 people with major depressive disorder and 75 people without depression. Functional connectivity, how closely regions fired together, fell into five profiles. One had fairly strong connectivity and more severe depression, anxiety, rumination, and trouble with daily function. One had weaker connectivity and milder symptoms. One had weak connectivity across a large part of the brain and more prominent trauma symptoms. One mixed strong and weak connections and had more severe depression, more substance use, and lower well-being. One had the strongest connectivity, with substance use prominent and trauma symptoms less so. All five differed from the comparison group in which regions and which frequencies were involved. Palva said stronger connectivity is not automatically better, and that the scans are not yet a way to pick a treatment. The release does not give sex or age. Educational notes. This is not a depression test.

Evidence level: Human study. A study in people, but an association isn't proof of cause.

Read the original at University of Helsinki / Nature Mental Health