The experience was distinct from déjà vu and other psychic experiences.Īnd all of the patients “probably” had temporal lobe epilepsy. They described the phenomenon as “knowing” what was going to happen in the immediate future. The study is written up in PubMed and basically says: all of the patients tested had similar experiences. We’ve been described as mutants, aliens, crazies.īut in fact, only one study to date has been done on prescience.Īnd that study concludes that prescience is an aura of temporal lobe epilepsy.
So, you remember specific details about something that never actually occurred. When novel events are processed, they are accompanied by a strong feeling of remembering. In a person with chronic déjà vu this circuit is either overactive or permanently switched on, creating memories where none exist. But, some people with epilepsy have this experience all the time.īecause seizures involve random firing of neurons in the temporal lobes, which include the hippocampus, and that could scramble the circuit. It doesn’t happen very often to most people. It’s also this circuit, the scientists are convinced, that explains déjà vu.Įvery so often, the circuit misfires, and a new experience that’s merely similar to an older one, seems identical. Neuroscientists know memories are actually groups of brain cells linked by especially strong chemical connections recalling a memory involves finding and activating a specific group. Take the neurological circuitry of the hippocampus, a region of the brain where new memories are formed. Reportedly, déjà vu can occur just prior to a temporal lobe seizure as an aura.īut you can experience déjà vu during the actual seizure activity or in the moments between seizures. The term “déjà vu” means, literally, “already seen”.ĭéjà vu has been firmly associated with temporal lobe epilepsy.
Those who experience prescience, feel they have the ability to see into the future in some way. Those who have experienced the déjà vu feeling describe it as an overwhelming sense of familiarity, with something that shouldn’t be familiar at all. It is distinguished primarily by 'the company it keeps'.Think of it as knowing something from the past…or feeling a premonition of the future. However ictal déjà vu occurs more frequently and is accompanied by several distinctive features. After controlling for study group, anxiety and depression scores were not associated with déjà vu frequency.ĭéjà vu is common and qualitatively similar whether it occurs as an epileptic aura or normal phenomenon. Epilepsy patients were more likely to report prior fatigue and concentrated activity, associated derealisation, olfactory and gustatory hallucinations, physical symptoms such as headaches, abdominal sensations and fear. Epileptic déjà vu occurred more frequently and lasted somewhat longer than physiological déjà vu. The experience of déjà vu itself was similar in the three groups. Data were collected on demographic factors, the experience of déjà vu using a questionnaire based on Sno's Inventory for Déjà Vu Experiences Assessment, symptoms of anxiety and depression using the Hospital Anxiety and Depression Scale as well as seizure characteristics, anti-epileptic medications, handedness, EEG and neuroimaging findings for epileptic patients.ħ3.5% of neurology patients, 88% of students and (by definition) all epilepsy patients had experienced déjà vu.
It is unclear whether any clinical features distinguish pathological and physiological forms of déjà vu.ĥ0 epileptic patients with ictal déjà vu, 50 non-epileptic patients attending general neurology clinics and 50 medical students at Edinburgh University were recruited. Déjà vu can occur as an aura of temporal lobe epilepsy and in some psychiatric conditions but is also common in the general population.
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