Quote:Based on his research, Dr. Karl Jansen notes that "Recent advances in neuroscience are bringing us closer to a brain-based understanding of the NDE as an altered state of consciousness."[19] Jansen also determined that the effects of an NDE can be induced with ketamine, a hallucinogenic, dissociative anesthetic related to PCP. Jansen explains, "Ketamine administered by intravenous injection is capable of reproducing all of the features of the NDE which have been commonly described."
Regarding ketamine, Jansen quotes Doctors Grinspoon and Bakalar that "The dissociative experiences often seem so genuine that users are not sure that they have not actually left their bodies."[20] Jansen quotes Dr. Leary that ketamine use represents "experiments in voluntary death."[21]
Jansen's explanation of why ketamine and a near-death condition will cause similar effects is summarized as follows:
NMDA receptors in portions of the brain are important in cognitive processing and other functions. The same region of the brain plays a role in epileptic events and others in which cell (neuron) damage may occur due to the presence of glutamate (neurotransmitters). The use of ketamine prevents such damage. The brain might possibly release a neuroprotective counter-flood to glutamate similar to ketamine during catastrophic events. It is known, for example, that endopsychosins and magnesium and zinc ions naturally bind to the same (drug binding) sites as ketamine (the PCP receptor of the NMDA receptor). The hallucinogenic effects of ketamine are due to an NMDA receptor blockade.
Thus Jansen concludes "Near-death experiences (NDEs) can be reproduced by ketamine via blockade of receptors in the brain (the N-methyl-D-aspartate, NMDA receptors) for the neurotransmitter glutamate."[22] Most of this explanation is based on well-understood observations of neurological processes.
http://rationalwiki.org/wiki/Near-death_experience (emphasis mine)
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Current time: September 27, 2024, 3:36 pm
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Where else?
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Where else? - by Little Rik - September 24, 2016 at 8:53 am
RE: Where else? - by RozKek - September 24, 2016 at 9:08 am
RE: Where else? - by Little Rik - September 24, 2016 at 9:15 am
RE: Where else? - by TheoneandonlytrueGod - October 14, 2016 at 10:03 pm
RE: Where else? - by Little Rik - October 15, 2016 at 8:56 am
RE: Where else? - by Jesster - September 24, 2016 at 9:11 am
RE: Where else? - by Excited Penguin - September 24, 2016 at 9:22 am
RE: Where else? - by Cyberman - September 24, 2016 at 11:15 am
RE: Where else? - by Excited Penguin - September 24, 2016 at 11:18 am
RE: Where else? - by LastPoet - September 24, 2016 at 11:19 am
RE: Where else? - by Excited Penguin - September 24, 2016 at 11:48 am
RE: Where else? - by LastPoet - September 24, 2016 at 2:39 pm
RE: Where else? - by LadyForCamus - September 25, 2016 at 12:42 pm
RE: Where else? - by Excited Penguin - September 24, 2016 at 9:24 am
RE: Where else? - by LadyForCamus - September 25, 2016 at 12:44 pm
RE: Where else? - by Aoi Magi - September 24, 2016 at 9:26 am
RE: Where else? - by Little Rik - September 24, 2016 at 9:40 am
RE: Where else? - by Angrboda - September 24, 2016 at 10:10 am
RE: Where else? - by Little Rik - September 25, 2016 at 10:16 am
RE: Where else? - by Joods - September 24, 2016 at 9:28 am
RE: Where else? - by Excited Penguin - September 24, 2016 at 9:29 am
RE: Where else? - by Cato - September 24, 2016 at 1:46 pm
RE: Where else? - by RozKek - September 24, 2016 at 10:03 am
RE: Where else? - by BrianSoddingBoru4 - September 24, 2016 at 9:39 am
RE: Where else? - by ukatheist - September 24, 2016 at 9:54 am
RE: Where else? - by Little Rik - September 24, 2016 at 10:04 am
RE: Where else? - by ukatheist - September 24, 2016 at 10:28 am
RE: Where else? - by purplepurpose - September 24, 2016 at 10:31 am
RE: Where else? - by robvalue - September 24, 2016 at 10:31 am
RE: Where else? - by BrianSoddingBoru4 - September 24, 2016 at 10:57 am
RE: Where else? - by Joods - September 24, 2016 at 11:06 am
RE: Where else? - by Whateverist - September 24, 2016 at 11:34 am
RE: Where else? - by robvalue - September 24, 2016 at 11:42 am
RE: Where else? - by Whateverist - September 24, 2016 at 1:38 pm
RE: Where else? - by Edwardo Piet - September 24, 2016 at 11:44 am
RE: Where else? - by Cyberman - September 24, 2016 at 11:50 am
RE: Where else? - by Edwardo Piet - September 24, 2016 at 11:50 am
RE: Where else? - by Minimalist - September 24, 2016 at 12:12 pm
RE: Where else? - by Cyberman - September 24, 2016 at 1:50 pm
RE: Where else? - by brewer - September 24, 2016 at 7:04 pm
RE: Where else? - by chimp3 - September 24, 2016 at 7:09 pm
RE: Where else? - by Little Rik - September 25, 2016 at 9:38 am
RE: Where else? - by chimp3 - September 25, 2016 at 9:42 am
RE: Where else? - by Little Rik - September 25, 2016 at 9:57 am
RE: Where else? - by chimp3 - September 25, 2016 at 9:59 am
RE: Where else? - by Angrboda - September 24, 2016 at 10:30 pm
RE: Where else? - by Little Rik - September 25, 2016 at 9:24 am
RE: Where else? - by Angrboda - September 25, 2016 at 12:35 pm
RE: Where else? - by Little Rik - September 26, 2016 at 8:21 am
RE: Where else? - by Angrboda - September 26, 2016 at 8:40 am
RE: Where else? - by Little Rik - September 26, 2016 at 9:00 am
RE: Where else? - by Angrboda - September 26, 2016 at 9:12 am
RE: Where else? - by Little Rik - September 26, 2016 at 9:23 am
RE: Where else? - by Angrboda - September 26, 2016 at 9:34 am
RE: Where else? - by Little Rik - September 26, 2016 at 10:19 am
RE: Where else? - by Angrboda - September 26, 2016 at 10:29 am
RE: Where else? - by Little Rik - September 27, 2016 at 10:36 am
RE: Where else? - by Angrboda - September 27, 2016 at 12:54 pm
RE: Where else? - by Little Rik - September 28, 2016 at 8:33 am
RE: Where else? - by chimp3 - September 28, 2016 at 9:13 am
RE: Where else? - by Little Rik - September 28, 2016 at 9:55 am
RE: Where else? - by chimp3 - September 28, 2016 at 9:59 am
RE: Where else? - by Little Rik - September 28, 2016 at 10:33 am
RE: Where else? - by chimp3 - September 28, 2016 at 10:35 am
RE: Where else? - by Angrboda - September 28, 2016 at 10:00 am
RE: Where else? - by Little Rik - September 29, 2016 at 10:50 am
RE: Where else? - by Angrboda - September 29, 2016 at 11:05 am
RE: Where else? - by Little Rik - September 29, 2016 at 11:12 am
RE: Where else? - by Angrboda - September 29, 2016 at 11:16 am
RE: Where else? - by Primordial Bisque - September 29, 2016 at 11:50 am
RE: Where else? - by Little Rik - September 30, 2016 at 10:46 am
RE: Where else? - by purplepurpose - September 30, 2016 at 11:19 am
RE: Where else? - by Angrboda - September 30, 2016 at 12:13 pm
RE: Where else? - by Little Rik - October 1, 2016 at 4:53 am
RE: Where else? - by Angrboda - October 1, 2016 at 11:26 am
RE: Where else? - by Little Rik - October 2, 2016 at 9:27 am
RE: Where else? - by account_inactive - September 25, 2016 at 9:58 am
RE: Where else? - by LadyForCamus - September 25, 2016 at 1:26 pm
RE: Where else? - by Cyberman - September 25, 2016 at 1:28 pm
RE: Where else? - by Edwardo Piet - September 25, 2016 at 1:29 pm
RE: Where else? - by Fidel_Castronaut - September 25, 2016 at 2:17 pm
RE: Where else? - by Little Rik - September 26, 2016 at 8:49 am
RE: Where else? - by robvalue - September 26, 2016 at 8:57 am
RE: Where else? - by Little Rik - September 26, 2016 at 9:16 am
RE: Where else? - by Fidel_Castronaut - September 26, 2016 at 12:03 pm
RE: Where else? - by Angrboda - September 26, 2016 at 12:20 pm
RE: Where else? - by Little Rik - September 27, 2016 at 11:13 am
RE: Where else? - by chimp3 - September 27, 2016 at 11:19 am
RE: Where else? - by Angrboda - September 27, 2016 at 12:21 pm
RE: Where else? - by robvalue - September 26, 2016 at 8:40 am
RE: Where else? - by Angrboda - September 26, 2016 at 8:42 am
RE: Where else? - by robvalue - September 26, 2016 at 9:04 am
RE: Where else? - by Cyberman - September 26, 2016 at 9:43 am
RE: Where else? - by Angrboda - September 26, 2016 at 9:22 am
RE: Where else? - by Little Rik - September 26, 2016 at 9:46 am
RE: Where else? - by robvalue - September 26, 2016 at 9:31 am
RE: Where else? - by Jesster - September 26, 2016 at 9:35 am
RE: Where else? - by Little Rik - September 26, 2016 at 10:07 am
RE: Where else? - by Angrboda - September 26, 2016 at 12:37 pm
RE: Where else? - by Little Rik - September 27, 2016 at 11:20 am
RE: Where else? - by Angrboda - September 27, 2016 at 12:36 pm
RE: Where else? - by Little Rik - September 28, 2016 at 9:04 am
RE: Where else? - by robvalue - September 26, 2016 at 9:36 am
RE: Where else? - by robvalue - September 26, 2016 at 10:17 am
RE: Where else? - by robvalue - September 26, 2016 at 10:20 am
RE: Where else? - by Little Rik - September 26, 2016 at 10:25 am
RE: Where else? - by Little Rik - September 26, 2016 at 10:30 am
RE: Where else? - by Whateverist - September 26, 2016 at 10:39 am
RE: Where else? - by Little Rik - September 27, 2016 at 10:42 am
RE: Where else? - by Homeless Nutter - September 27, 2016 at 11:17 am
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RE: Where else? - by mlmooney89 - September 27, 2016 at 11:36 am
RE: Where else? - by Simon Moon - September 27, 2016 at 7:58 pm
RE: Where else? - by Little Rik - September 28, 2016 at 9:19 am
RE: Where else? - by mlmooney89 - September 28, 2016 at 10:21 am
RE: Where else? - by Whateverist - September 29, 2016 at 11:36 am
RE: Where else? - by Little Rik - September 28, 2016 at 10:39 am
RE: Where else? - by Crossless1 - September 29, 2016 at 12:12 pm
RE: Where else? - by LostLocke - September 30, 2016 at 11:25 am
RE: Where else? - by Jesster - October 1, 2016 at 4:58 am
RE: Where else? - by Little Rik - October 1, 2016 at 7:03 am
RE: Where else? - by Jesster - October 1, 2016 at 7:08 am
RE: Where else? - by Little Rik - October 1, 2016 at 7:20 am
RE: Where else? - by Jesster - October 1, 2016 at 7:25 am
RE: Where else? - by BrianSoddingBoru4 - October 1, 2016 at 7:11 am
RE: Where else? - by Little Rik - October 1, 2016 at 7:52 am
RE: Where else? - by BrianSoddingBoru4 - October 1, 2016 at 7:55 am
RE: Where else? - by Little Rik - October 1, 2016 at 8:27 am
RE: Where else? - by Crossless1 - October 1, 2016 at 8:32 am
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RE: Where else? - by Little Rik - October 1, 2016 at 9:05 am
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RE: Where else? - by Little Rik - October 1, 2016 at 9:26 am
RE: Where else? - by Angrboda - October 1, 2016 at 11:36 am
RE: Where else? - by Little Rik - October 2, 2016 at 9:21 am
RE: Where else? - by chimp3 - October 2, 2016 at 9:29 am
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RE: Where else? - by Little Rik - October 3, 2016 at 6:20 am
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RE: Where else? - by chimp3 - October 5, 2016 at 5:32 am
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RE: Where else? - by Little Rik - October 1, 2016 at 9:00 am
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RE: Where else? - by Little Rik - October 3, 2016 at 6:33 am
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RE: Where else? - by Little Rik - October 4, 2016 at 6:24 am
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RE: Where else? - by Little Rik - October 5, 2016 at 6:18 am
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RE: Where else? - by robvalue - October 5, 2016 at 6:04 am
RE: Where else? - by Little Rik - October 5, 2016 at 6:29 am
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RE: Where else? - by Little Rik - October 5, 2016 at 6:23 am
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RE: Where else? - by Little Rik - October 5, 2016 at 6:34 am
RE: Where else? - by chimp3 - October 5, 2016 at 7:02 am
RE: Where else? - by Little Rik - October 6, 2016 at 8:24 am
RE: Where else? - by robvalue - October 6, 2016 at 9:05 am
RE: Where else? - by Little Rik - October 6, 2016 at 10:34 am
RE: Where else? - by Jesster - October 6, 2016 at 11:30 am
RE: Where else? - by Little Rik - October 7, 2016 at 9:37 am
RE: Where else? - by Jesster - October 7, 2016 at 9:41 am
RE: Where else? - by robvalue - October 5, 2016 at 6:30 am
RE: Where else? - by robvalue - October 5, 2016 at 6:37 am
RE: Where else? - by robvalue - October 5, 2016 at 8:33 am
RE: Where else? - by Little Rik - October 6, 2016 at 8:11 am
RE: Where else? - by The Grand Nudger - October 6, 2016 at 8:14 am
RE: Where else? - by Little Rik - October 6, 2016 at 8:51 am
RE: Where else? - by The Grand Nudger - October 6, 2016 at 12:38 pm
RE: Where else? - by Little Rik - October 7, 2016 at 9:30 am
RE: Where else? - by robvalue - October 7, 2016 at 9:32 am
RE: Where else? - by Little Rik - October 7, 2016 at 9:53 am
RE: Where else? - by Jesster - October 7, 2016 at 9:55 am
RE: Where else? - by Little Rik - October 7, 2016 at 10:06 am
RE: Where else? - by robvalue - October 7, 2016 at 9:39 am
RE: Where else? - by Little Rik - October 7, 2016 at 10:16 am
RE: Where else? - by Little Rik - October 7, 2016 at 10:28 am
RE: Where else? - by robvalue - October 8, 2016 at 1:32 am
RE: Where else? - by Little Rik - October 8, 2016 at 8:12 am
RE: Where else? - by robvalue - October 8, 2016 at 8:20 am
RE: Where else? - by Little Rik - October 8, 2016 at 8:32 am
RE: Where else? - by Jesster - October 8, 2016 at 8:39 am
RE: Where else? - by Little Rik - October 8, 2016 at 9:13 am
RE: Where else? - by chimp3 - October 9, 2016 at 10:36 am
RE: Where else? - by Little Rik - October 10, 2016 at 5:35 am
RE: Where else? - by Iroscato - October 14, 2016 at 9:39 am
RE: Where else? - by robvalue - October 8, 2016 at 8:51 am
RE: Where else? - by Little Rik - October 8, 2016 at 9:02 am
RE: Where else? - by robvalue - October 8, 2016 at 10:10 am
RE: Where else? - by The Grand Nudger - October 8, 2016 at 11:18 am
RE: Where else? - by Little Rik - October 9, 2016 at 9:02 am
RE: Where else? - by ApeNotKillApe - October 9, 2016 at 9:17 am
RE: Where else? - by The Grand Nudger - October 9, 2016 at 12:26 pm
RE: Where else? - by Little Rik - October 10, 2016 at 5:46 am
RE: Where else? - by chimp3 - October 10, 2016 at 6:12 am
RE: Where else? - by Grandizer - October 11, 2016 at 11:00 am
RE: Where else? - by chimp3 - October 11, 2016 at 7:17 pm
RE: Where else? - by robvalue - October 10, 2016 at 6:47 am
RE: Where else? - by chimp3 - October 10, 2016 at 6:50 am
RE: Where else? - by Little Rik - October 11, 2016 at 8:58 am
RE: Where else? - by robvalue - October 10, 2016 at 6:51 am
RE: Where else? - by The Grand Nudger - October 10, 2016 at 8:56 am
RE: Where else? - by robvalue - October 10, 2016 at 8:59 am
RE: Where else? - by chimp3 - October 11, 2016 at 7:55 am
RE: Where else? - by Little Rik - October 11, 2016 at 8:45 am
RE: Where else? - by robvalue - October 11, 2016 at 9:03 am
RE: Where else? - by Little Rik - October 11, 2016 at 10:37 am
RE: Where else? - by The Grand Nudger - October 11, 2016 at 10:47 am
RE: Where else? - by Little Rik - October 11, 2016 at 10:50 am
RE: Where else? - by The Grand Nudger - October 11, 2016 at 10:54 am
RE: Where else? - by Little Rik - October 12, 2016 at 5:26 am
RE: Where else? - by chimp3 - October 12, 2016 at 7:44 pm
RE: Where else? - by Arkilogue - October 12, 2016 at 9:53 pm
RE: Where else? - by Little Rik - October 13, 2016 at 10:30 am
RE: Where else? - by Angrboda - October 13, 2016 at 12:00 pm
RE: Where else? - by Little Rik - October 14, 2016 at 7:39 am
RE: Where else? - by Angrboda - October 14, 2016 at 11:24 am
RE: Where else? - by Little Rik - October 15, 2016 at 8:51 am
RE: Where else? - by chimp3 - October 15, 2016 at 11:19 am
RE: Where else? - by Little Rik - October 16, 2016 at 7:32 am
RE: Where else? - by chimp3 - October 16, 2016 at 7:41 am
RE: Where else? - by Little Rik - October 16, 2016 at 8:33 am
RE: Where else? - by chimp3 - October 16, 2016 at 8:38 am
RE: Where else? - by Little Rik - October 16, 2016 at 8:48 am
RE: Where else? - by chimp3 - October 16, 2016 at 8:59 am
RE: Where else? - by Little Rik - October 16, 2016 at 9:30 am
RE: Where else? - by chimp3 - October 16, 2016 at 9:38 am
RE: Where else? - by Little Rik - October 17, 2016 at 9:08 am
RE: Where else? - by chimp3 - October 17, 2016 at 7:11 pm
RE: Where else? - by Little Rik - October 19, 2016 at 5:53 am
RE: Where else? - by chimp3 - October 19, 2016 at 6:01 am
RE: Where else? - by Little Rik - October 20, 2016 at 7:04 am
RE: Where else? - by SofaKingHigh - October 20, 2016 at 7:11 am
RE: Where else? - by Little Rik - October 20, 2016 at 8:02 am
RE: Where else? - by SofaKingHigh - October 20, 2016 at 8:06 am
RE: Where else? - by _Velvet_ - October 13, 2016 at 1:53 pm
RE: Where else? - by Fidel_Castronaut - October 16, 2016 at 7:38 am
RE: Where else? - by Little Rik - October 16, 2016 at 8:10 am
RE: Where else? - by The Grand Nudger - October 12, 2016 at 7:20 am
RE: Where else? - by chimp3 - October 12, 2016 at 7:33 am
RE: Where else? - by Fake Messiah - October 13, 2016 at 3:41 am
RE: Where else? - by Little Rik - October 13, 2016 at 10:39 am
RE: Where else? - by Expired - October 17, 2016 at 5:54 am
RE: Where else? - by Losty - October 17, 2016 at 12:39 pm
RE: Where else? - by Expired - October 14, 2016 at 8:26 am
RE: Where else? - by Little Rik - October 14, 2016 at 9:36 am
RE: Where else? - by Fidel_Castronaut - October 16, 2016 at 8:18 am
RE: Where else? - by Little Rik - October 16, 2016 at 8:42 am
RE: Where else? - by The Grand Nudger - October 16, 2016 at 12:17 pm
RE: Where else? - by LastPoet - October 16, 2016 at 3:08 pm
RE: Where else? - by SilverFrog - October 21, 2016 at 5:08 pm
RE: Where else? - by Little Rik - October 22, 2016 at 6:42 am
RE: Where else? - by The Grand Nudger - October 17, 2016 at 3:51 am
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