In a small study of 50 people published in Science Advances, weaker and slower beta-band brain activity went together with poorer timing perception, more disorganised speech and more severe symptoms. The researchers stress the findings are preliminary.
Researchers led by McGill University report that a single weakened brain signal may help connect symptoms of schizophrenia that are usually studied separately. The study, published in Science Advances, involved scientists from McGill, the McConnell Brain Imaging Centre, the University of Montreal and affiliated research centres. It examined beta-band activity, the rhythmic electrical patterns that help coordinate information processing, perception and movement, in 25 people diagnosed with schizophrenia and 25 healthy participants, using high-resolution magnetoencephalography (MEG) at The Neuro in Montreal.
Participants judged the timing of visual and auditory information, and their speech was analysed for signs of disorganised thinking. People with schizophrenia showed weaker and slower beta-band activity than the control group. Those with the most pronounced abnormalities also tended to have more difficulty judging the timing of sights and sounds, more disorganised speech and more severe clinical symptoms. Senior author Dr. Lena Palaniyappan said the work offers early evidence that measuring how the brain builds and revises its model of the world may reveal a common thread behind a confusing array of symptoms.
The authors are cautious. The study included only 50 participants, and lead author Hsi (Tiana) Wei described it as a first, modest-size study whose links to speech and clinical severity must be tested in larger, independent samples. If confirmed, beta-band measures might one day help identify young people seeking mental health help who need extra support to prevent psychosis, and the signal could be explored as a target for future treatments. For now it is a research finding, not a diagnostic test. This report is based on a university release as relayed by ScienceDaily; the underlying paper was not independently reviewed here.
