The largest ever medical study into near-death and out-of-body experiences has discovered that some awareness may continue even after the brain has shut down completely. Scientists at the University of Southampton have spent four years examining more than 2,000 people who suffered cardiac arrests at 15 hospitals in the UK, US and Austria. And they found that nearly 40 per cent of people who survived described some kind of 'awareness' during the time when they were clinically dead before their hearts were restarted. One man even recalled leaving his body entirely and watching his resuscitation from the corner of the room. Despite being unconscious and 'dead' for three minutes, the 57-year-old social worker from Southampton, recounted the actions of the nursing staff in detail and described the sound of the machines. We know the brain can't function when the heart has stopped beating," said Dr Sam Parnia, a former research fellow at Southampton University ... who led the study. "But in this case, conscious awareness appears to have continued for up to three minutes into the period when the heart wasn't beating, even though the brain typically shuts down within 20-30 seconds after the heart has stopped. The man described everything that had happened in the room." Of 2060 cardiac arrest patients studied, 330 survived and of 140 surveyed, 39 per cent said they had experienced some kind of awareness while being resuscitated. One in five said they had felt an unusual sense of peacefulness. Some recalled seeing a bright light. 13 per cent said they had felt separated from their bodies.