The brain uses backward instant replays to remember important travel routes. If there's a "reward" at the end of the trip, specialized neurons in the hippocampus of the brain "replay" the route taken to get it, but backward. And the greater the reward, the more often the brain replays it.

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The brain uses backward instant replays to remember important travel routes. If there's a "reward" at the end of the trip, specialized neurons in the hippocampus of the brain "replay" the route taken to get it, but backward. And the greater the reward, the more often the brain replays it.