http://reporter.leeds.ac.uk/513/s5.htmMany of us have experienced déjà vu - the unsettling sensation of knowing that a situation could not have been experienced, combined with the feeling that it has. It is usually so fleeting that psychologists have until recently thought it impossible to study. But for some people, the feeling of having been there before is a persistent sensation, making every day a ‘Groundhog Day’. Psychologists from Leeds’ memory group are working with sufferers of chronic déjà vu on the world’s first study of the condition.
“The exciting thing about these people is that they can ‘recall’ specific details about an event or meeting that never actually occurred. It suggests that the sensations associated with remembering are separate to the contents of memory, that there are two different systems in the brain at work.” Dr Moulin believes a circuit in our temporal lobe fires up when we recall the past, creating the experience of remembering but also a ‘recollective experience’ – the sense of the self in the past. In a person with chronic déjà vu this circuit is either overactive or permanently switched on, creating memories where none exist. When novel events are processed, they are accompanied by a strong feeling of remembering.