Published September 18, 2026, this preliminary cross-sectional study examined 18 Azeri adults with recent-onset schizophrenia spectrum disorders. Researchers recorded eyes-open resting EEG from 19 standard sites and compared regional power across ten frequency bands with individual symptom ratings.
What the researchers found Higher delta power in frontal, central and temporal regions tracked more severe positive symptoms, especially hallucinations and delusions. Higher central-parietal theta and gamma power tracked selected negative and general symptoms. Other symptom dimensions were associated with lower theta, alpha or beta power.
How to read the result These are corrected correlations in a small, culturally specific sample. The study did not include a control group, test diagnostic accuracy or show that QEEG can select or improve treatment. Independent replication is essential.
Why it matters The study adds underrepresented population data and supports examining symptom dimensions rather than treating schizophrenia as one uniform electrophysiological profile.
Source and disclosure Peer-reviewed cross-sectional study; authoritative abstract checked. The authors declared no known competing interests. Funding was not reported in the checked record. Prepared with AI assistance and source-checked September 19, 2026.