• Hit the Reset Button in Your Brain - NYTimes.com
    http://www.nytimes.com/2014/08/10/opinion/sunday/hit-the-reset-button-in-your-brain.html

    If you’re feeling overwhelmed, there’s a reason: The processing capacity of the conscious mind is limited. This is a result of how the brain’s attentional system evolved. Our brains have two dominant modes of attention: the task-positive network and the task-negative network (they’re called networks because they comprise distributed networks of neurons, like electrical circuits within the brain). The task-positive network is active when you’re actively engaged in a task, focused on it, and undistracted; neuroscientists have taken to calling it the central executive. The task-negative network is active when your mind is wandering; this is the daydreaming mode. These two attentional networks operate like a seesaw in the brain: when one is active the other is not.

    This two-part attentional system is one of the crowning achievements of the human brain, and the focus it enables allowed us to harness fire, build the pyramids, discover penicillin and decode the entire human genome. Those projects required some plain old-fashioned stick-to-itiveness.

    But the insight that led to them probably came from the daydreaming mode. This brain state, marked by the flow of connections among disparate ideas and thoughts, is responsible for our moments of greatest creativity and insight, when we’re able to solve problems that previously seemed unsolvable. You might be going for a walk or grocery shopping or doing something that doesn’t require sustained attention and suddenly — boom — the answer to a problem that had been vexing you suddenly appears. This is the mind-wandering mode, making connections among things that we didn’t previously see as connected.

    (...)

    Taking breaks is biologically restorative. Naps are even better. In several studies, a nap of even 10 minutes improved cognitive function and vigor, and decreased sleepiness and fatigue. If we can train ourselves to take regular vacations — true vacations without work — and to set aside time for naps and contemplation, we will be in a more powerful position to start solving some of the world’s big problems. And to be happier and well rested while we’re doing it.

    #création