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Head Stuff

Your memory changes every time

Your brain isn't a video recorder; it actually edits memories as you recall them

By Smartasaurus· 1 min read Curious

Your brain doesn't actually keep a film reel of your life…

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The short version
  • Your brain isn't a video recorder; it actually edits memories as you recall them
  • This is why eyewitnesses grow more confident and less accurate over time.
  • The film reel metaphor was always wrong.

Every time you remember something, you edit it. The original recording is gone — what you keep is the most recent re-saved version.

Neuroscientists call this *reconsolidation*. When a memory is recalled, the neural circuit holding it briefly destabilises, becomes plastic, and has to be written back into long-term storage. During that window, anything you are feeling, anything someone tells you, anything you happen to notice, can be folded into the trace before it locks again. The memory you store afterwards is a blend of the original and the moment of remembering.

This is why eyewitnesses grow more confident and less accurate over time. It is why a story told a hundred times drifts from the event it describes. The most-loved memories — the ones you revisit most — are the most heavily rewritten.

More from Head Stuff
Why your fingers can't tickle you

The film reel metaphor was always wrong. Memory is closer to a draft you revise every time you open it, never knowing which lines were in the first version.

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Sources (2) — tap to view
  1. 1.Nader, memory reconsolidation in the amygdala (Nature)
  2. 2.Propranolol and traumatic memory (Journal of Psychiatric Research)
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