Archives de la catégorie neuroscience
NDE have been used as proof of the existence of souls in a large set of stupid arguments.
Following this trend, it seems that prophet Sir Terry Pratchett revealed that rats have souls, managed by the DEATH of Rats of course, in his novels.
Now scientific evidence come to support either:
- the existence of rats’ souls, or
- the non-supernatural, quite materialistic, explanation of NDE.
Jimo Borjigin, UnCheol Lee, Tiecheng Liu, Dinesh Pal, Sean Huff, Daniel Klarr, Jennifer Sloboda, Jason Hernandez, Michael M. Wang, and George A. Mashour
Surge of neurophysiological coherence and connectivity in the dying brain
PNAS 2013 ; published ahead of print August 12, 2013, doi:10.1073/pnas.1308285110
The brain is assumed to be hypoactive during cardiac arrest. However, the neurophysiological state of the brain immediately following cardiac arrest has not been systematically investigated. In this study, we performed continuous electroencephalography in rats undergoing experimental cardiac arrest and analyzed changes in power density, coherence, directed connectivity, and cross-frequency coupling. We identified a transient surge of synchronous gamma oscillations that occurred within the first 30 s after cardiac arrest and preceded isoelectric electroencephalogram. Gamma oscillations during cardiac arrest were global and highly coherent; moreover, this frequency band exhibited a striking increase in anterior–posterior-directed connectivity and tight phase-coupling to both theta and alpha waves. High-frequency neurophysiological activity in the near-death state exceeded levels found during the conscious waking state. These data demonstrate that the mammalian brain can, albeit paradoxically, generate neural correlates of heightened conscious processing at near-death.
Illustration by ~Smaggers
Neural Decoding of Visual Imagery During Sleep
T. Horikawa, M. Tamaki, Y. Miyawaki, Y. Kamitani
Science 3 May 2013: Vol. 340 no. 6132 pp. 639-642 doi: 10.1126/science.1234330
What Is Stochastic Resonance? Definitions, Misconceptions, Debates, and Its Relevance to Biology
McDonnell MD, Abbott D (2009)
PLoS Comput Biol 5(5): e1000348. doi:10.1371/journal.pcbi.1000348
L’association étudiante du Master professionnel « Médiations des sciences » de l’université Bordeaux 3 organise un cycle de conférences sur les neurosciences.
La première conférence « Neurotechnologies : Vers un Homme augmenté ? » aura lieu le mardi 22 janvier à 18h30 à la Maison écocitoyenne.
The Connectome of a Decision-Making Neural Network
Travis A. Jarrell, Yi Wang, Adam E. Bloniarz, Christopher A. Brittin, Meng Xu, J. Nichol Thomson, Donna G. Albertson, David H. Hall, and Scott W. Emmons
Science 27 July 2012: Vol. 337 no. 6093 pp. 437-444 doi: 10.1126/science.1221762
Religious Factors and Hippocampal Atrophy in Late Life
Owen AD, Hayward RD, Koenig HG, Steffens DC, Payne ME
PLoS ONE 6(3): e17006. doi:10.1371/journal.pone.0017006
Not sure if the John Templeton Foundation guys are happy with the outcome of this study…
What would the Buddha have said? Monkeys have been trained to put themselves into a Zen-like trance – but out of desire for marshmallows rather than [Source]
I’ll have to read the paper :
Neurofeedback training on sensorimotor rhythmin marmoset monkeys
Philippens, Ingrid H.C.H.M.; Vanwersch, Raymond A.P.
31 March 2010 – Volume 21 – Issue 5 – pp 328-332 doi: 10.1097/WNR.0b013e3283360ba8
Neurofeedback research in a model closely related to humans is recommended to rule out placebo effects and unspecific factors bridging the gap between nonvalidated empirical and standardized controlled research. In this article, telemetric sensorimotor rhythm (SMR; 11–14 Hz) feedback training in the marmoset monkey is applied to examine the monkey’s capability to voluntary control their brain activity. Four monkeys, provided with two epidural bioelectric electrodes above the sensorimotor cortex, were trained with positive reinforcement on SMR measured by online analyses of 1.28 s electroencephalogram epochs in 30-min sessions. These monkeys learned within five sessions to increase their α activity. The first evidence of nonhuman primates having an operant control over the SMR is provided, an initial step for a much-needed scientific basis to neurofeedback.
Genetic risk and a primary role for cell-mediated immune mechanisms in multiple sclerosis
The International Multiple Sclerosis Genetics Consortium & The Wellcome Trust Case Control Consortium
Nature 476, 214–219 (11 August 2011) doi:10.1038/nature10251
Oxytocin receptor gene (OXTR) is related to psychological resources
Shimon Saphire-Bernstein, Baldwin M. Way, Heejung S. Kim, David K. Sherman, and Shelley E. Taylor
PNAS September 13, 2011 vol. 108 no. 37 15118-15122 doi: 10.1073/pnas.1113137108
There is nothing paranormal about near-death experiences : how neuroscience can explain seeing bright lights, meeting the dead, or being convinced you are one of them
Dean Mobbs, Caroline Watt
Trends in Cognitive Sciences, In Press, Corrected Proof, doi:10.1016/j.tics.2011.07.010
Short and sweet!
Large scale studies showing the number of people who report near-death experiences (NDEs). The far left bars show that a large proportion (82%) of near-death survivors do not report near-death experiences . The central bars represent a retrospective, or historic, study . Crucially, the far right bars show that around half of the people who reported near-death experiences in this study were not in danger of dying .
underlined by me, refs in the paper 😀