“Cells that fire together wire together.”

The adult brain, it turns out, is not just plastic, but, as James Olds, a professor of neuroscience who directs the Krasnow Institute for Advanced Study at George Mason University, puts it, “very plastic.”  Or, as Merzenich himself says, “massively plastic.”  The plasticity diminishes as we get older–brains do get stuck in their ways–but it never goes away.  our neurons are always breaking old connections and forming new ones, and brand-new nerve cells are always being created.  “The brain,” observes Olds, “has the ability to reprogram itself on the fly, altering the way it functions.”

Source:  The Shallows, What the Internet Is Doing to Our Brains by Nicholas Carr

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