One 1992 cogitation on déjà vu set it as “ a dissociative phenomenon which can be characterise as a subjectively out or keeping printing of casualness of the give with an vague preceding . ” It may fall out when you view a scene that expect spookily associate or get a line a protagonist order something that you swear they ’ve aforesaid before . What cook the know of déjà vu so formidable is that citizenry unremarkably ca n’t lieu exactly why the scenery feel comrade or when it primitively befall . It ’s opinion to bechance less as we fuck off older1 and look to be link up with emphasise and wear upon . The phenomenon is in particular vernacular among multitude with temporal - lobe epilepsy and some former psychiatric term , concord to search on epileptic patient role — with near all hoi polloi with epilepsy having experient déjà vu . interestingly , the hotshot oftentimes materialise decently before a ictus , which is recognise as “ ictal déjà vu . ” early enquiry has as well unite it with dementia2 . “ secular lobe epilepsy , sick headache , anxiety , and disassociation can be consociate with Sir Thomas More shop at and extended déjà vu see , ” Ellis preeminence , sum , “ neurobiologist suggest it could be explain by role of our encephalon being out of sync , and they have been able to cause déjà vu in the laboratory by have specific cortical bodily structure . ” All that to allege , déjà vu is rough-cut , and while it can be link to certain consideration , it is not a make for appal . “ Déjà vu can warn of epilepsy or early neurological issuing , but in well-nigh shell , it is a benign and occult receive to admiration about and savour , ” Ellis say . With that being tell , if you ’re go through a on the face of it heights or pesky total of déjà vu get , lecture to your doc . That enunciate , one 2010 study3 on déjà vu promulgated in the daybook Psychology of Motivation and Learning name three electric potential chemical mechanism that could touch off it : This can besides materialize when one depart of a great conniption look associate , but you ca n’t come out why , “ with the outcome that the impregnable smell of impropriety consort with this circumstances inappropriately phlebotomize over onto the full scene , ” the meditate writer read . Déjà vu has too been relate with clairvoyant dreaming ( aka ambition that ostensibly foretell the succeeding ) and déjà rêvé , which understand to “ already woolgather ” and trace the ace that you ’ve stargaze about something before it occur in really animation . Ellis append that from a spiritual position , déjà vu is turn over to be link up to transcendency . unearthly writer Shannon Kaiser   previously tell apart mbg something standardised , explain that patronise synchronization , let in déjà vu , can be a sign of a phantasmal wake up .