Remember the last time that something a friend did caught you off guard? Probably—and that's because the human brain is specially tuned to remember things that are out of the ordinary.
But just how the brain treats those instances has remained uncertain. Some scientists had hypothesized that an unexpected stimulus would trigger a loop that involved both the hippocampus (responsible in part for long-term memory) and nucleus accumbens (involved in reward and pleasure) to make those memories super sticky. But without peering into these centers, researchers could not know for sure.
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Playing the Body Electric: Scientific American - 3 views
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