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EIRE2003
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How exactly does this work?
Originally posted by LURCH
Possibly a bit of crossed wiring between the patrs of the mind dealing with experiencing and remembering?
In most people's cases it would be caused by a temporary lowering of the seizure threshold due to bad diet, not sleeping enough, or not well enough, and or stress. In chronic cases you would expect physical damage to the hippocampus, most commonly hippocampal sclerosis, or a progressive neuronal condition called "mossy fiber sprouting". These are the two most common hippocampal problems that lead to chronic seizures. Anything that causes a lesion or neuronal damage can become a seizure focus.Originally posted by arivero
Yes, but why does the seizure happen, in first place?
The single most common seizure trigger (trigger, not cause) is stress, emotional or physical. This would be in line with your experiences. Another really bad thing for anyone prone to seizures is alcohol. This lowers the seizure threshold alot.I tend to associate Dejavues with critical situations, even if my conscient part of the brain is not aware of the criticallity. Scaping from a girl, joining to other, or just to walk near a dangereus cliff are potential sources of dejavu.
Originally posted by zoobyshoe
In most people's cases it would be caused by a temporary lowering of the seizure threshold due to bad diet, not sleeping enough, or not well enough, and or stress.
The single most common seizure trigger (trigger, not cause) is stress, emotional or physical. This would be in line with your experiences. Another really bad thing for anyone prone to seizures is alcohol. This lowers the seizure threshold alot.
There is a psychiatrist or psychologist who started his own clinic exclusively devoted to studying the phenomenon of deja vu, but I was alarmed and disappointed to find out it had taken a turn into pseudoscience. He doesn't seem to have found out they are seizures, and that this has been proven beyond doubt.Originally posted by arivero
I could try to sell it to a sect :-)
Makes perfect sense, although I haven't seen anything about this before. Is this related to Persinger's ongoing studies of EM fields on the brain?Originally posted by LURCH
The phenominon can also be triggered by certain EM fields. This has been reproduced in the lab.
But zooby, just because a type of "dejavu" feeling has been found in people diagnosed with temporal lobe epilepsy, it doesn't mean that anyone experiencing what they describe as "dejavu" is having a seizure. That would be like telling someone with a cough that they have tuberculosis because it has been medically proven that a symptom of tuberculosis is a cough.Originally posted by zoobyshoe
Again, it is a logical train of thought, but I don't understand why they haven't reviewed the literature where they would find that deja vu is the single most frequently experienced simple partial seizure symptom of all, and where they would have run across the often cited, well known paper: Anatomical origin of déja` vu and vivid `memories' in human temporal lobe epilepsy 1994 or the much earlier paper The Role of the Limbic System in Experiential Phenomena of Temporal Lobe Epilepsy 1981, both of which show EEG recordings, picked up by depth electrodes, of paroxysmal activity in the hippocampal region while the patient reports being stunned by the feeling of deja vu.
That's like saying - Why look for any other reason for the cough when you know for a fact that tuberculosis can cause it?Despite that, these non-seizure theories are unprovable and unessesary in the presence of the proven seizure phenomenon.
Originally posted by Evo
But zooby, just because a type of "dejavu" feeling has been found in people diagnosed with temporal lobe epilepsy, it doesn't mean that anyone experiencing what they describe as "dejavu" is having a seizure.
Originally posted by zoobyshoe
Seizure-fearing types often say that just because the seizure kind is proven doesn't mean other kinds don't exist. True, strictly speaking, but an irrational reaction to the proven explanation isn't really a good reason to decide a less upsetting sounding explanation must exist and be found.
That would be like telling someone with a cough that they have tuberculosis because it has been medically proven that a symptom of tuberculosis is a cough.
I've met many people who have not had deja vus. When I describe them, these people have no idea what I'm talking about. They think you are exaggerating about one situation reminding you of an actual similar situation. Polls I've read come up with figures between 30 and 50 percent of the population reporting they have had a deja vu.I don't know anyone that has not experienced "dejavu". Are you saying that the entire population of the Earth is having seizures?
Originally posted by zoobyshoe
Polls I've read come up with figures between 30 and 50 percent of the population reporting they have had a deja vu.
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I do not have a link. I didn't save any of these so I will have to dig around for you.What is Dejavu™? Is that the strip club chain?Originally posted by LURCH
Do you have a link or refference to one of these polls? I find that number astonishing, I don't believe I've ever met a person who has never experienced dejavu.
I can claim all of the above. Mostly STRESS.Originally posted by arivero
Well, actually alcohol, bad diet (excesive) and lack of sleeping should fit better with me than stress...
You mentioned this in another thread, and what you said was dead on. Coincidence?As physicist (this is physics forums, is it?) I even developed a internal religious belief based upon Everet many worlds: the DejaVu situation marks a bifurcation in your life, so strong that the quantum collapse is to be perceived via the dejavy feeling.
Non-consequential isn't completely accurate. A few deja vus over the course of a person's life time won't do any percievable damage. Nothing you would have to worry about in the least. The main thing to worry about is the fact that seizures teach the neurons to seize. They are just that little bit more likely to do it the next time the seizure threshold is compromised.Originally posted by Evo
Zooby - explain how these "seizures" are non-consequential?
Seizure activity itself doesn't damage the neurons that I have ever read. With big seizures, however, there is some evidence that there is a post-seizure starvation of blood flow to selected areas. This can potentially kill more neurons.They leave behind no damage?
Well, name your percentage and I'll endorse it. In fact, even if we stipulate for the sake of argument that 100% of people will have at least one deja vu before they die, it still can't be used as an argument against them being simple partials. If you ask how 100% of people could have at least one seizure all I can say is why not? If the symptom is there, the hypersynchronous firing is there.Also, I agree with Lurch, 30-50% has to be WAY too low.
Day-jaa-voo, or the feeling of experiencing something that seems to have happened before, is still not fully understood by scientists. However, some theories suggest that it is a result of a mismatch between memory and perception, causing a feeling of familiarity with a new experience.
Studies have shown that approximately 60-80% of people experience day-jaa-voo at least once in their lifetime. However, the intensity and frequency of this phenomenon may vary from person to person. It is also important to note that some people may never experience day-jaa-voo at all.
While there is no scientific evidence to suggest that day-jaa-voo can be intentionally triggered, some research suggests that certain factors such as fatigue, stress, and familiar surroundings may increase the likelihood of experiencing day-jaa-voo.
Some scientists have proposed that day-jaa-voo could also be a result of neurological glitches or errors in the brain's processing of information. However, more research is needed to fully understand the underlying mechanisms of this phenomenon.
Day-jaa-voo is a sensation that can be experienced by anyone and has been extensively studied by scientists. While some may attribute it to paranormal experiences, there is no scientific evidence to support this claim. Therefore, day-jaa-voo is considered a psychological phenomenon rather than a paranormal one.