Psychology
How does memory work?
Memory works by encoding experiences into patterns of connections between brain cells, storing them, and retrieving them later. It isn't a recording — the brain reconstructs each memory when recalled, which is why memories can change.
See it in motion.
Watch a 2-minute animated lesson that shows exactly how memory works.
Step by step
- 1Encoding turns an experience into neural connections.
- 2Storage holds it short-term (seconds–minutes) or long-term (consolidated, often during sleep).
- 3Retrieval reactivates the pattern — and can subtly rewrite it.
- 4Repetition and meaning strengthen memories; the hippocampus is key to forming them.
Frequently asked questions
- Why do we forget things?
- Memories fade without use, get overwritten, or were never strongly encoded; forgetting also helps filter unimportant detail.
- What's the difference between short-term and long-term memory?
- Short-term holds a little information briefly; long-term stores large amounts durably after consolidation.
- Does sleep affect memory?
- Yes — sleep helps consolidate the day's experiences into stable long-term memories.