Is “now” expandable? Why do you seem to experience time in slow motion in a sudden emergency, like an accident? Eagleman’s (terrifying) experiments show that in fact you don’t perceive more densely, the amygdala cuts in and records the experience more densely, so when the brain looks back at that dense record, it thinks that time must have subjectively slowed down, but it didn’t. When that system malfunctions, you can get “credit misattribution”-the sense that “I didn’t do that!” It may explain why some schizophrenics think that their normal internal conversation is voices coming from somewhere else, and it might be curable by training their brain to manage signal lags better. In order to manage a realistic sense of causality, the brain has to calibrate the rate of different signals coming into it. “Our perception of an event depends on what happens next.” In whole-body terms, we live a half-second in the past, which means that something which kills you quickly (like a sniper bullet to the head), you’ll never notice. With an onscreen demonstration, Eagleman showed that “Time is actively constructed by the brain.“ His research has shown that there’s at least a 1/10-of-a-second lag between physical time and our subjective time, and the brain doesn’t guess ahead, it fills in behind. “Why does time seem to slow down when you’re scared? And why does it seem to speed up as you get older?” Our perception of time raises all sorts of questions, Eagleman began.
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