A study of 153 brain scans has linked a particular furrow, near the front of each hemisphere, to hallucinations in schizophrenia. This fold tends to be shorter in those patients who hallucinate, compared with those who do not. It is an area of the brain that appears to have a role in distinguishing real perceptions from imagined ones. Researchers say the findings, published in Nature Communications, might eventually help with early diagnosis.–DM