Large study was in human cerebral spinal fluid and mouse models A new Northwestern study in humans and mice has discovered a novel biomarker of schizophrenia that could also serve as a new drug candidate to treat the disorder’s cognitive symptoms. Photo by Kristin Samuelson Current schizophrenia medications treat symptoms such as hallucinations and delusions, but do little for cognitive symptoms like disorganized thinking or executive dysfunction. As a result, many patients are unable to work, r...