Reconceptualising neurophysiological biomarkers of schizophrenia: an investigation of the MMN/P3a complex in early psychotic disorders

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I am measuring a brain response to subtle changes in the environment called �mismatch negativity�. MMN indexes fundamental sensory processes that help the brain focus on certain information and ignore other information. MMN is consistently impaired in patients with Schizophrenia and is thought to be a biomarker of this illness. I am assessing MMN in the very early stages of psychosis to determine its specificity and whether it predicts illness trajectory.