A Good Memory or a Bad One? One Brain Molecule Decides.


A Good Memory or a Bad One? One Brain Molecule Decides.

By Yasemin Saplakoglu 
Quanta Magazine
10 min



When the brain encodes memories as positive or negative, one molecule determines which way they will go.


You’re on the vacation of a lifetime in Kenya, traversing the savanna on safari, with the tour guide pointing out elephants to your right and lions to your left. Years later, you walk into a florist’s shop in your hometown and smell something like the flowers on the jackalberry trees that dotted the landscape. When you close your eyes, the store disappears and you’re back in the Land Rover. Inhaling deeply, you smile at the happy memory.

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