Trigger For Brain Plasticity Identified: Signal Comes, Surprisingly, From Outside The Brain

Researchers have long sought a factor that can trigger the brain's ability to learn -- recapturing the "sponge-like" quality of childhood. Called Otx2, it causes a key type of cell in the cortex to mature, initiating a critical period -- a window of heightened brain plasticity, when the brain can readily make new connections

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