Science & technology | Silent synapses

How adult brains learn the new without forgetting the old

They keep a stock of unused synapses in reserve, to be activated as needed

Pyramidal neurons in the cerebral cortex, illustration. Pyramidal neurons are found in certain areas of the brain including the cerebral cortex, the hippocampus, and the amygdala. Here, the illustration shows the synaptic signals highlighted using a microscopy fluorescence technique.
Pyramids of potentialImage: Science Photo Library

This article appeared in the Science & technology section of the print edition under the headline “Silent synapses”

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