When some patients undergo brain surgery to stop the seizures, they wake up to a world free of the phenomenon. For these patients, déjà vu is a result of getting their wires crossed. Research on such patients showed that their feelings of déjà vu were likely linked to seizure activity in the medial temporal lobe, the part of the brain associated with sensory perception, speech production and memory association.ĭuring a seizure, neurons misfire, sending mixed-up messages to different parts of the body. The observation was no coincidence-those with some types of epilepsy seem to feel déjà vu more often than those without the neurological disorder. However, scientists have pondered the question for quite some time: A description of a déjà vu experience in patients with epilepsy appears as early as 1888. The phenomenon is difficult to study-most people, when they experience déjà vu, aren’t hooked up to a bunch of electrodes, with clipboard-toting researchers at the ready. The origin of déjà vu (French for “already seen”), a sense of familiarity with something entirely new, remains hidden somewhere deep in our brains. As you walk through a new city for the first time, something familiar clicks in your mind, giving you pause. Perhaps a case of déjà vu? Photo by leandroagguireĭéjà vu is a rare occurrence, but you know it when you feel it. Symptoms: crunched-up brows, a narrowing of the eyes and a slight tilt of the head.
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