Patients Suffer Dejà Vu ... Over and Over

Patients Suffer Dejà Vu ... Over and Over
By Robert Roy Britt, LiveScience Managing Editor
posted: 30 January 2006 01:34 pm ET


Imagine suffering from chronic dejà vu. You don't even go to the doctor because you feel like you've already been there.
"We had a peculiar referral from a man who said there was no point visiting the clinic because he'd already been there, although this would have been impossible," said psychologist Chris Moulin, who runs a memory clinic at the University of Leeds in the UK.
So Moulin has started the first known study of the condition.
Dejà vu hits most of us now and then. We're struck by the sensation that we have experienced an event before, even though we can't fully remember it or perhaps know it didn't really happen. The sensation is fleeting, so researchers can't study it.
But Moulin figures chronic dejà vu sufferers offer an opportunity to do research that might unlock the secrets of the everyday variety.
The man who thinks he's been to Moulin's clinic even gave details of the visit that never occurred. He has dejà vu so bad that he doesn't watch TV news because he feels like he's seen it all before, Moulin said. Things get tricky when the man is asked to predict what's ahead, however.
"When this particular patient's wife asked what was going to happen next on a TV program he'd claimed to have already seen, he said, 'How should I know? I have a memory problem!'"
Moulin and colleagues have since found other patients, now that they know what to look for.
The condition can cause depression and is sometimes diagnosed as a state of delusion. But Moulin's team believes it to be a dysfunction of memory.
"The exciting thing about these people is that they can 'recall' specific details about an event or meeting that never actually occurred," Moulin said. "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."
The problem might involve a memory circuit that is overactive or stuck in the "on" position.
The researchers plan now to use brain scans in an effort to pinpoint the problem.





What Causes Déjà Vu?
Sunday September 10, 2006

That distinct illusion of having been there and done that has no explanation. The parapsychologist will tell you it's a past life experience. Yogi Berra will remind you it seems like you've felt it before. And most scientists will throw their hands up. Some believe déjà vu involves emotional responses to similar events; others figure the brain short circuits, sending an event to memory just a split second before putting it into consciousness.

Its fleeting nature makes déjà vu about as easy to study as the afterlife. Some people have a chronic variety, though, and so one study is attempting to get inside their minds. Chris Moulin, who runs a memory clinic at the University of Leeds in the UK and is doing the research, describes one patient who illustrates how déjà vu might be related to memories being mixed up by the brain: "When this particular patient's wife asked what was going to happen next on a TV program he'd claimed to have already seen, he said, 'How should I know? I have a memory problem!'"