No it doesn't. Only the cerebral cortex flatlines in that time:
'The cerebral cortex of the brain, Parnia explained, that is responsible for thinking and processing the information from the five senses, also shows no activity within 2 and 20 seconds of the heart stopping.'
Brain function does not die immediately after the heart stops finds study
It also goes on to say, as the title explains, that brain function does not cease immediately after a cardiac arrest.
The point is the cortex, the outer layer of the brain is where consciousness thought is. So the cortext where consciousness is shuts down within 2 to 20 seconds. Hardly enough time to have such vivid conscious thought on a range of things such as visiting heaven, life reviews, meeting loved ones ect.
From the same link: '...the actual time to complete brain death may take hours after the heart has stopped he added.'
Yes the stem may still have some activity for hours. But that is not where any conscious thought resides.
And halucinations. That's been explained three times. You are still ignoring it.
I haven't ignored this. I disagreed that NDE has the hallmarks of hallucinations and explained why. For one hallucinations should be individual and different for each person and conext according to psychological differences, the culture and environment it happens in. But NDE are very consistent across culture and between individuals. They all share the same qualities and events. They recall forgoten information, real information not imaginary of hallucinated and fragmented information.
I also posted the article where this was addressed as not an issue.
"...There are currently three explanations for these accounts. The first is physiological; that the hallucinations patients experience is due to disturbed brain chemistry caused by drug treatment, a lack of oxygen or changes in carbon dioxide levels.
In the Southampton study none of the four patients who had near-death experiences had low levels of oxygen or received any unusual combination of drugs during their resuscitation."
Parnia also addressed whether hallucinations can account for NDE.
Parnia also has trouble with the hallucination theory. When people have a lack of oxygen to the brain — something Parnia sees daily in the intensive care unit —they become completely delusional and disoriented. With delusions, thinking becomes fragment, a muddled mess. “They don’t have well-structured thought processes,” he says. They thrash about and, if the oxygen becomes too low, they go into a coma. NDE-ers, by contrast, report vivid experiences.
In addition, “people are coming back and describing real events that have occurred and that doctors and nurses have verified, validated.” So, by definition, they can’t be hallucinations, because they’re describing real events, he argues.
https://nationalpost.com/news/canada/life-after-life-does-consciousness-continue-after-our-brain-dies
OK yeah you can but on;y for between 2 and 20 seconds as the lack of oxygen to the outer cortex will flat line it and that is where conscious thought resides.
This is also addressed by one of the article I linked
The EEG measures electrical activity in the cortex, or outer part of the brain, which is responsible for conscious thought. Following cardiac arrest a lucid, organized, and conscious experience should be impossible. With a flat EEG, it is still possible for electrical activity to be present in the lower parts of the brain, such as the brain stem. There is no chance that electrical activity in these lower parts of the brain could account for such a highly lucid and ordered experience as described by NDErs. Lucidity coupled with the predictable order of elements establishes that NDEs are not dreams or hallucinations, nor are they due to any other causes of impaired brain functioning.
'Loss of consciousness starts about 8 s after the last heart beat and circulatory standstill occurs after 10–15 s.' Timing of Circulatory and Neurological Events in Syncope.
Even if thats true 8 seconds is not long to have a NDE with such detail and different events happening. Even during those seconds its not exactly a time to be having such clear and coherent thoughts and be happy and peaceful.
No. When part of the brain flatlines. If all the the brain shows no activity whatsoever then you are literally brain dead. It's no 'near death' anymore.
Actually the researchers had a measure for when a patient was classed as clinically dead.
“In our prospective study of patients that have been clinically dead (VF on the ECG) no electric activity of the cortex of the brain (flat EEG) must have been possible, but also the abolition of brain stem activity like the loss of the corneareflex, fixed dilated pupils and the loss of the gag reflex is a clinical finding in those patients.
Is it really worth my time explaining that someone who has died instantly is in no position to tell you about what they experienced? I think you need to concentrate a little harder about what you are posting.
Obviously there would be a short time gap between suffering the trauma and dying. But what I am saying is that some people have been suddenly made unconscious before they had arrested due to the sudden impact and severity. So there was no period where they were conscious to experience any hallucinations or dream states. Yet they still had conscious experiences as described by NDE depsite being unconscious and then clinically dead.
Many NDEs have been reported in which the lifethreatening event was sudden, unexpected, and occurred with immediate unconsciousness, such as an unanticipated car crash. The NDEs would have unconsciousness occur so rapidly that a psychological defense mechanism would not have time to develop.
It's quite common: Dreaming while under anesthesia no cause for alarm
'In their study, the researchers assessed 300 consecutive healthy patients who were undergoing elective surgery that required general anesthesia. The Bispectral Index, a measure of the anesthetic effect on the brain, was used to gauge the depth of anesthesia during surgery. After the surgery was over, the patients were interviewed about their dreams. Twenty-two percent of patients reported dreaming.'
Notwithstanding that coming out of a general anesthesia is not immediate. The effects wear off and you become more aware. You become 'less unconscious.'
A number of reasons can be argued as to why its not associated with dreams during anesthesia.
The dreams during anesthesia are said to be like normal dreams during sleep which are usually hard to remember and less clear especially coming out of anesthesia as it effects memory and not about the specific clear experiences during NDE which are consistent and include meeting deceased loved ones, meeting angles and some divine being, seeing oneself from above, a moral evaluation of ones entire life. To the experiencer they are more real than everyday life whereas dreams tend to be recognised quickly as unreal. NDE is real enough to change peoples lives.
The spikes during a procedure under anesthesia show brain activity in the conscious section of the brain which should not happen. They happen during the procedure and not later when coming out of anesthesia. Measurements can tell when a brain is unconscious as opposed to in a conscious state and these brains are in an unconscious state, obviously if a procedure is being done.
NDE are consistent and dreams during coming out of anesthesia are inconsistent due to individual psychological reasons. NDE is associated with clarity, peace, tranquility, a lack of fear of death whereas anesthesia dreams can be confusing and frightening as the patient feared waking up during the procedure.
NDE are consistent and happen to all ages, gender and across all cultures and race. Whereas anesthesia dreams seem to happen to certain groups such as young people and males.
dreams experienced under anesthesia can be distressing to patients, Patient characteristics that were associated with dreaming during anesthesia included younger age, male gender, Dreams experienced under anesthesia were similar to those during sleep
The dreaming reported by many patients during surgery, in most cases, does not mean the anesthesia is wearing off, Australian researchers report in the journal Anesthesiology.
www.reuters.com
