They used electroencephalography (EEG), which measures the brain’s electrical activity or “brain waves”, to study the brain’s response to commonly and rarely presented tones that differed in length.
When these rare “deviant” tones are presented to healthy people, the brain automatically generates a particular electrical wave called mismatch negativity, or MMN. People diagnosed with schizophrenia have reduced MMN.
In this new study, the researchers followed a group of people clinically at high risk for developing psychosis. They found that the individuals who went on to develop schizophrenia had smaller MMN than the subgroup who did not. This finding suggests that MMN might be useful in predicting the later development of schizophrenia.
A “Brain Wave” Test for Schizophrenia Risk?
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