Slashdot Mirror


Consciousness On-Off Switch Discovered Deep In Brain

An anonymous reader writes "One moment you're conscious, the next you're not. For the first time, researchers have switched off consciousness by electrically stimulating a single brain area. Although only tested in one person, the discovery suggests that a single area – the claustrum – might be integral to combining disparate brain activity into a seamless package of thoughts, sensations and emotions. It takes us a step closer to answering a problem that has confounded scientists and philosophers for millennia – namely how our conscious awareness arises. When the team zapped the area with high frequency electrical impulses, the woman lost consciousness. She stopped reading and stared blankly into space, she didn't respond to auditory or visual commands and her breathing slowed. As soon as the stimulation stopped, she immediately regained consciousness with no memory of the event. The same thing happened every time the area was stimulated during two days of experiments.

8 of 284 comments (clear)

  1. Wow! by rotorbudd · · Score: 5, Funny

    That sounds like the experiments that my wife has been doin

    --
    A bullet may have your name on it, but artillery is addressed to " Whom It May concern"
    1. Re:Wow! by peragrin · · Score: 5, Funny

      Yes but your wife isn't using directed electrical signals to shut you down.

      Your wife is using directed Sound signals to shut down you down.

      completely different method. Definitely worth a separate patent.

      --
      i thought once I was found, but it was only a dream.
  2. Interesting, but N=1 and... by dhj · · Score: 5, Interesting

    From TFA:

    Anil Seth, who studies consciousness at the University of Sussex, UK, warns that we have to be cautious when interpreting behaviour from a single case study. The woman was missing part of her hippocampus, which was removed to treat her epilepsy, so she doesn't represent a "normal" brain, he says.

    Normally a scientist will not ethically be able to put deep brain electrodes in a person, but this was likely part of a larger experiment related to the hippocampus surgery. It will be interesting to see if similar cases present similar behaviors and more interesting if the same thing happens in someone with a full hippocampus.

    1. Re:Interesting, but N=1 and... by Anonymous Coward · · Score: 5, Informative

      The original article seems to be conspicuously missing. Here is the pubmed reference (http://www.ncbi.nlm.nih.gov/pubmed/24967698), but the link there is broken too and even browsing through the journal's archive doesn't bring up any reference to the article. Hopefully that gets fixed very soon.
      Also, back when I was PhD student in neuroscience Crick and Koch's idea that the claustrum was the seat of consciousness was one of my class's favorite jokes- if it turns out they were actually right I'm gonna be so f-ing mad.

  3. Can be stimulated via sternocleidomastoid by digitalhermit · · Score: 5, Interesting

    I have been experimenting with this technique since the early 80s. It is possible to stimulate the claustrum via pressure along the sternocleidomastoid. By pinching this area it causes sympathetic nerve activity that can effective render someone unconscious. My colleague has perfected the technique to the point that he uses it at parties. Quite eerie, actually.

    Peace. Stay healthy and have a long life..

  4. Re:Brain ZAP! by Nefarious+Wheel · · Score: 5, Funny

    Hee hee! Oh I like that. Press the button again. Wait until he's chewing that spoonful. Now, replace the ice cream with castor oil. Let me press it! Let me press it!

    --
    Do not mock my vision of impractical footwear
  5. Re:but... by Anonymous Coward · · Score: 5, Funny

    I have a few. whichever ones i successfully snatched off the playground. usually the slowest runners.

  6. Re:but... by Anonymous Coward · · Score: 5, Funny

    Not everyone can afford a jeep and a big net.