Researchers from the Karolinski Institute in Sweden have discovered that cognitive training can fundamentally change the brain at a chemical level by increasing the release of dopamine, a neurochemical crucial to many brain functions.
What exactly is dopamine's role? As a neurotransmitter — a chemical used for communication between brain cells — dopamine is important for signalling reward. The brain releases dopamine to say "good job, do that again!" in response to pleasurable experiences — thus, dopamine is often critical to learning.
Check out the training (game) tool that I use on my iPhone, Luminosity. They also have a website here.
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