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originally posted by: TrueBrit
a reply to: pl3bscheese
The crucial aspect here, is that this study cannot be said to have located the part of the brain responsible for consciousness. Whether consciousness is centred in the brain matter or not, merely being able to knock a human being out with direct electrical manipulation does not prove a god damned thing, because consciousness is about more than whether one is asleep or awake.
It is about the ability of the mind to comprehend the situation it finds itself in, to conceptualise the meaning of sensory input, not just the ability to receive input.
For the study to be useful, the experiment should have focused upon trying to keep the subject technically awake, while not conscious of the fact, and that has not happened at all. I do not accept the idea that this study has found out anything other than how to switch a person off and on at will, and those are separate issues. It is not semantics. Science, no matter what kind one is thinking about, is a subject which requires attention to absolutely minuscule detail. Therefore distinctions like this are totally core, with regard to any study this important.
Sleepwalking, also known as Somnambulism, is a condition in which a sleeping person exhibits behaviors associated with being awake, appears to be awake but is actually still sleeping.
The neural mechanisms that underlie consciousness are not fully understood. We describe a region in the human brain where electrical stimulation reproducibly disrupted consciousness. A 54-year-old woman with intractable epilepsy underwent depth electrode implantation and electrical stimulation mapping. The electrode whose stimulation disrupted consciousness was between the left claustrum and anterior-dorsal insula. Stimulation of electrodes within 5 mm did not affect consciousness. We studied the interdependencies among depth recording signals as a function of time by nonlinear regression analysis (h2 coefficient) during stimulations that altered consciousness and stimulations of the same electrode at lower current intensities that were asymptomatic. Stimulation of the claustral electrode reproducibly resulted in a complete arrest of volitional behavior, unresponsiveness, and amnesia without negative motor symptoms or mere aphasia. The disruption of consciousness did not outlast the stimulation and occurred without any epileptiform discharges. We found a significant increase in correlation for interactions affecting medial parietal and posterior frontal channels during stimulations that disrupted consciousness compared with those that did not. Our findings suggest that the left claustrum/anterior insula is an important part of a network that subserves consciousness and that disruption of consciousness is related to increased EEG signal synchrony within frontal–parietal networks.
Each night people go through several cycles of non-REM and REM sleep. Sleepwalking (somnambulism) most often occurs during deep, non-REM sleep (stage 3 or stage 4 sleep) early in the night. If it occurs during REM sleep, it is part of REM behavior disorder and tends to happen near morning.
: to cease sleeping
: to become aroused or active again
: to become conscious or aware of something
originally posted by: BO XIAN
a reply to: 727Sky
It just seems to early for them to be so smugly proud and pontifical about their findings when there are several other aspects that could muddy the picture they are looking at, quite considerably.
originally posted by: NthOther
Probably not. I think their enthusiasm stems from the subtext of the article: (perceived) validation of positivism/materialism (i.e., "God is dead", that whole thing). The language they use is a dead giveaway:
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.
Koubeissi thinks that the results do indeed suggest that the claustrum plays a vital role in triggering conscious experience.
Most of these involve changes of wakefulness as well as consciousness but not this time, says Seth. "So even though it's a single case study, it's potentially quite informative about what's happening when you selectively modulate consciousness alone."
originally posted by: Pinke
Why whenever scientists do work in the areas of consciousness or NDEs do they get panned whenever they don't come back with a result that validates people's spiritual beliefs? Let them get on with their work.