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  • Watching the brain 'switch off' self-awareness

    Everybody has experienced a sense of “losing oneself” in an activity – being totally absorbed in a task, a movie or sex. Now researchers have caught the brain in the act.

    Self-awareness, regarded as a key element of being human, is switched off when the brain needs to concentrate hard on a tricky task, found the neurobiologists from the Weizmann Institute of Science in Rehovot, Israel.

    The team conducted a series of experiments to pinpoint the brain activity associated with introspection and that linked to sensory function. They found that the brain assumes a robotic functionality when it has to concentrate all its efforts on a difficult, timed task – only becoming "human" again when it has the luxury of time.

    Ilan Goldberg and colleagues used functional magnetic resonance imaging (fMRI) to scan the brains of nine volunteers during the study. Participants were shown picture cards and told to push buttons to indicate whether or not an animal was depicted.

    The series was shown slowly the first time, and at three times the rate on the second run through. On its third showing, the volunteers were asked to use the buttons to indicate their emotional response to the pictures. The experiment was then repeated using musical extracts, rather than pictures, and asked to identify whether a trumpet played.

    Allocating resources

    Goldberg found that when the sensory stimulus was shown slowly, and when a personal emotional response was required, the volunteers showed activity in the superfrontal gyrus – the brain region associated with self-awareness-related function.

    But when the card flipping and musical sequences were rapid, there was no activity in the superfrontal gyrus, despite activity in the sensory cortex and related structures.

    “The regions of the brain involved in introspection and sensory perception are completely segregated, although well connected,” says Goldberg, “and when the brain needs to divert all its resources to carry out a difficult task, the self-related cortex is inhibited.”

    The brain’s ability to “switch off” the self may have evolved as a protective mechanism, he suggests. “If there is a sudden danger, such as the appearance of a snake, it is not helpful to stand around wondering how one feels about the situation,” Goldberg points out.

    It is possible that research into how the brain switches self-awareness on and off will help neurologists gain a deeper understanding of autism, schizophrenia and other mental disorders where this functionality may be impaired.

    Journal reference: Neuron (vol 50, p 329)

    http://www.newscientist.com/article....ine-news_rss20

  • #2
    Sounds reasonable, and GTD helps us get out of this robotic behaviour by getting stuff out of our heads. Having said that, I quite like the feeling of getting absorbed in something, and it can be extremely productive (in fact I feel that this is the time I am being most productive). Of course it's possible to get absorbed in doing something and then realise that it was a waste of time because it wasn't the right thing to do. GTD helps us again by creating "pockets" of absorbed doing time (Next Actions) while giving us confidence that these activities contribute to the ultimate goals.

    Modern life has become so intellectually complicated for everyone that it necessary to have a system like GTD to help our brains, which have been designed to hunt down bison and live in caves, cope with it.

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    • #3
      Excellent pointer, alsa. Thanks very much. Ties in with some work on ADT that I'm interested in.

      Originally posted by treelike
      Modern life has become so intellectually complicated for everyone that it necessary to have a system like GTD to help our brains, which have been designed to hunt down bison and live in caves, cope with it.
      I quite agree. I'm presenting at a workshop next week on the topic of balance in modern life, and I think a system to organize ourselves is crucial to alleviating brain overload.

      Great stuff!


      "Overloaded Circuits: Why Smart People Underperform" Jan 2005 Harvard Business Review, Edward Hallowell

      http://doi.contentdirections.com/mr/...i=10.1225/8789
      http://lucypevensie.livejournal.com/471731.html
      http://202.183.190.133/multim/2777.pdf

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