Eternal Sunshine for the Spotless Mind.
Memories are a complex combination of objective information—the color of a car, the size of a building—and less tangible emotional feelings, like fear, anxiety, joy, or satisfaction. But to scientists, memories are nothing more than a series of chemical and physical changes, the firing of a nerve here, which sends electrochemical impulses to another nerve there, which together encode everything that we associate with a memory.
But exactly what do those changes look like? And is it possible to override them? In a milestone paper published in the journal Nature, scientists may have provided some answers, explaining how emotional baggage gets attached to memories, and how that can be manipulated to quite literally turn bad memories good. In separate work appearing in the journal PLOS ONE, researchers say that a commonly used anesthetic gas, xenon, if administered at exactly the right moment, can also strip the painful and…
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