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(From The Economic Times)
Byline: Vithal C Nadkarni
Is deja vu extra-sensory?" ET asked last week. Now consider more mundane explanations, which fall into four categories. The first involves theories of dual processing.
Scientists say effective perception depends on seamless working of memory "retrieval" and "familiarity". When familiarity runs ahead of retrieval, deja vu might occur. A variant theory points at discord between the two circuits due to fatigue or stress.
In contrast, purely neurological explanations view deja vu as being sparked by small, brief seizures. These are akin to micro-epileptic episodes, says one theory drawing …