Was it a vision or a waking dream?

Was it a vision or a waking dream? A commentary on Disrupting posterior cingulate connectivity disconnects consciousness from the external environment by Herbet, G., Lafargue, G., de Champfleur, N. M., Moritz-Gasser, S., le Bars, E., Bonnetblanc, F., et al. (2014). Neuropsychologia 56C, 239–244. doi: 10.1016/j.neuropsychologia.2014.01.020 Reminiscent of Wilder Penfield’s famous experiments, Neurologists in France have …

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Functional Connectivity Measures After Psilocybin Inform a Novel Hypothesis of Early Psychosis

Functional Connectivity Measures After Psilocybin Inform a Novel Hypothesis of Early Psychosis Psilocybin is a classic psychedelic and a candidate drug model of psychosis. This study measured the effects of psilocybin on resting-state network and thalamocortical functional connectivity (FC) using functional magnetic resonance imaging (fMRI). Fifteen healthy volunteers received intravenous infusions of psilocybin and placebo in …

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Neural correlates of the psychedelic state

Neural correlates of the psychedelic state as determined by fMRI studies with psilocybin Psychedelic drugs have a long history of use in healing ceremonies, but despite renewed interest in their therapeutic potential, we continue to know very little about how they work in the brain. Here we used psilocybin, a classic psychedelic found in magic …

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Broadband Cortical Desynchronization Underlies Psychedelic State

Broadband Cortical Desynchronization Underlies the Human Psychedelic State   Psychedelic drugs produce profound changes in consciousness, but the underlying neurobiological mechanisms for this remain unclear. Spontaneous and induced oscillatory activity was recorded in healthy human participants with magnetoencephalography after intravenous infusion of psilocybin—prodrug of the nonselective serotonin 2A receptor agonist and classic psychedelic psilocin. Psilocybin …

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The Entropic Brain – A theory of conscious states

The Entropic Brain – A theory of conscious states informed by neuroimaging research with psychedelic drugs Entropy is a dimensionless quantity that is used for measuring uncertainty about the state of a system but it can also imply physical qualities, where high entropy is synonymous with high disorder. Entropy is applied here in the context …

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