Embargoed to 2000 Monday October 12
Undated handout composite photo issued by University of Cambridge of a black and white image of lines which appears meaningless until the brain records information from the colour image on the left. This ability of the brain to fill in gaps in reality may account for hallucinations, say scientists. PRESS ASSOCIATION Photo. Issue date: Monday October 12, 2015. Visions and sounds that do not exist can be generated by the brain's habit of predicting what it expects to experience, filling in missing gaps in reality, the search shows. See PA story SCIENCE Hallucination. Photo credit should read: University of Cambridge/PA Wire
NOTE TO EDITORS: This handout photo may only be used in for editorial reporting purposes for the contemporaneous illustration of events, things or the people in the image or facts mentioned in the caption. Reuse of the picture may require further permission from the copyright holder.