Article
How Memory Works
Every memory is rebuilt, not replayed.
- Author
- By Asha Verma
- Reviewed by
- Reviewed by Devon Blake
- Last reviewed
- Last reviewed 2026-06-18
- Reading time
- 8 min read
Understand the difference between short-term, long-term, and working memory, and why recall changes memories.
Memory feels like a recording, but it is closer to reconstruction: the brain rebuilds an experience from fragments each time it is recalled.
The central question
Why do some experiences stay vivid for decades while others vanish within minutes? The answer lies in how the brain encodes, consolidates, and retrieves information.
Three memory systems
Sensory memory holds raw input for a fraction of a second. Working memory keeps a small amount of information active for immediate use. Long-term memory stores information that has been consolidated, sometimes for a lifetime.
Why forgetting happens
Forgetting is not always failure. Weak encoding, interference from similar memories, and the brain's tendency to prioritize meaningful or emotional information all shape what survives.
Sources
- Memory: From Mind to Molecules, Larry R. Squire and Eric R. Kandel — W. H. Freeman