- #71
fuzzyfelt
Gold Member
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zoobyshoe said:I'm not sure what this means.
I'll make it a question. You wrote that OBEs were a neurological phenomenon, a blockage... coupled with release hallucinations, and are you now saying that this isn't the case?
zoobyshoe said:Weinberger seems not to understand Konorski is describing "release hallucinations", that he is attempting to explain "hallucinations in the sane", not hallucinations in general, and faults him for not explaining other hallucinations, in particular hallucinations in the absence of sensory deprivation. On the other hand I think his taking issue with the need for "retro" connections in this kind of hallucination is a good point. Given Phantom Limbs, why would this Konorski mechanism be necessary? I looked on Amazon for Konorski's book and it is $170.00, so I'm not about to buy it to find out. Perhaps Sacks will hear about Weinberger's criticism and address it somewhere at some point.
Yes, I had been wondering about their superfluous nature as well as evidence of function. I don’t really see how this idea makes much sense. Also I feel any wish to link sensory deprivation and release hallucinations only to sanity and extra noise and different hallucinations only to psychosis is not supported here. Is such a link supported?
zoobyshoe said:I can't tell what you're saying here. Your original sentence before the quotes was never completed. Likewise it's clear you frequently have difficulty making out the intent of my sentences. I have explained this but I'll repeat: the reason I did not specifically characterize the tpj as the place where the OBE could be triggered, saying instead merely that they had been "located" to that area, is that my intent was simply to point out it was neurological.
My sentence was completed by the quote, but the intention is fair enough.
zoobyshoe said:I think this is a straw man. I did not say they questioned it because it did not explain enough.
No straw man, the words in the sentence following the word 'because' was part of my explanation, not any addition of words to your position.
zoobyshoe said:This is the point: the OBE was easy to trigger in this patient because she was epileptic. This was not her normal seizure, but because she was epileptic she had hyperexitable neurons. The OBE happened incidentally to their search for her seizure focus, they were not looking for it or expecting it.
Could the same thing be triggered in a non-epileptic at this spot? Almost certainly, but it would require more voltage and would not be allowed because it could leave them vulnerable to spontaneous seizures once the neurons here had been "kindled".
That there is an understandable reason for the experiment to be limited doesn’t change that fact that it is limited.
zoobyshoe said:The haptic hallucinations were not typical, yes. In other respects it was much more like the typical OBE than the Ehrrson demonstration.
Agreed other hallucinations involved were not typical and, again, it varied in other respects from typical OBE reports.
zoobyshoe said:What various areas? How much knowledge would satisfy you?
Accurate information and relevant facts.
zoobyshoe said:How are they exclusive? As I pointed out earlier one can lead to the other: seizures can be followed by paralysis, and subdued cortical activity can lead to seizures. Likewise, the spreading cortical depression of migraine aura is preceded by a slow wave of neuronal hyperactivity. The depression that follows can then spawn another wave of hyperactivity. To the extent your linked paper ascribes hallucination to a dream state caused by either hypo- or hyper- activity it is also, apparently unknown to that author, proposing the circumstances from which seizures and migraine aurae arise. In other words, it isn't providing
an air tight case for the dream mechanism of OBE at all, but points back at seizures instead.
My words were ‘possibly exclusive’. The paper offers two complimentary possibilities.
zoobyshoe said:Failure of proprioception is not the hallucination of something that isn’t there, it’s the inability to sense something that is there
states a possibly exclusive course.
Certainly states may change.
I'm not in any position to speak for the author, but there was no mention of any air-tight case.
zoobyshoe said:The dream mechanism has the misfortune of ascribing the OBE to a brief period of psychosis. Even if we stipulate that is the cause, you couldn't call it an "hallucination in the sane" anymore. Your promise about that paper was that it had something relevant to say about hallucinations in the sane. Instead, I wasted my time reading up to that part only to find out it was actually saying sane people sometimes lapse into brief psychosis.
Then also included in this criterion of psychosis is sleep with attendant hallucinational dreams. Recalling that McCreery was discussing functional dis-order, sleep - something that happens routinely in all humans, and considered beneficial isn’t considered dis-order, but natural order. The bigger picture here is that he is not discussing sanity and insanity as mutually exclusive, but that there are varying degrees that is something more like a continuum across the population. Also interesting is an idea that unusual experiences and cognitive disorganisation are linked with academic achievement and creativity (Nettle 2006) and problem solving and adapting (Jackson 1997) so that degrees may be beneficial.
zoobyshoe said:I don't see a complete thought here.
The explanation given for OBEs may not accommodate additional information.
zoobyshoe said:No, it's not "anything goes". Certain kinds of hallucinations are associated with certain causes. The OBE is known to be a simple partial seizure. There may be other related mechanisms for it (Migraine aura) , or some experience similar enough to it to be casually described as an OBE, but that one, at least, has been positively identified. Infrequently and by itself a simple-partial seizure is harmless. The danger is that if a person finds themselves to be frequently having spontaneous OBE's they could also be having more serious seizures for which they have amnesia (complex partial seizures) and should be checked out. The notion we can just throw out any "alternative", and one is as good as another is not correct.
I see the misunderstanding, I was not expanding on the little knowledge shown of hallucinations, I meant here that given all these problems with the statements in post 24that there were a range of alternative explanations to those stated.
zoobyshoe said:This paragraph is pretty silly.
It is pedantic, sure, and I could have left a range of alternatives that I spoke of above to be guessed at, but thought it might be helpful to suggest what these may be. Given how misunderstood my language has been, it would seem to have actually been not so silly.
zoobyshoe said:All the cases linking the OBE to the tpj in seizures pretty much sews up the case that it is an essential area to this phenomenon. That doesn't limit the experience to that area, the activity is almost certainly spreading out from there, just based on the fact seizure activity usually does spread out into adjacent areas, and sometimes to remote areas. In any event, stimulation of the brain areas of epileptics by electrode is how Wilder Penfield mapped out many areas of the cortex and created his famous "homunculus". From this we got further proof that brain areas are dedicated. The homunculus is not in dispute: the brain areas of epileptics perform the same tasks as those of non-epileptics. People who deviate from the normal map are rare. The right temporo-parietal junction is clearly important for creating the sense we are located in our bodies. That's fascinating. Who knew we even needed such a sense?
That is a fairer explanation.
zoobyshoe said:If you read all these books by Sacks, Ramachandran, Penfield, and Klawans you find they are packed full of cases of unbelievable neurological experiences you never imagined existed. In 95% of these cases no one questions that they are neurological, despite the fact none has been fully explained. It is only when you get to the small percentage of experiences that have become attached in people's minds to the paranormal or mystical that people suddenly start trying to pick the neurological explanations apart. No one ever seems to come out of the woodwork and argue that hemi-neglect after stroke has a mystical significance. No one seems interested in asserting that the "shuffling gait" of Parkinson's sufferers is the characteristic walk of the Ascendent Masters of the Third Level of Sainthood and Uppity Consciousness, or some such. Malfunction is accepted as malfunction, and the neurological explanation is not doubted EXCEPT when it has become attached to a notion people don't want to relinquish. Obviously people must have been suffering these seizures going back to prehistoric times, and the experience was taken at face value: the 'spirit or 'mind' was assumed to be able to leave the body, because that what it seemed like.
Certainly it would be difficult to question things that had not yet been imagined :)
I don’t know, but possibly it is that reports of OBEs in 15-25% of the general population (Irwin 1985- I think, I'll check it later) that makes them prone to some explanation.
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