The effects of psilocybin and MDMA on between-network resting state functional connectivity in healthy volunteers

Perturbing a system and observing the consequences is a classic scientific strategy for understanding a phenomenon.

Psychedelic drugs perturb consciousness in a marked and novel way and thus are powerful tools for studying its mechanisms. In the present analysis, we measured changes in resting-state functional connectivity (RSFC) between a standard template of different independent components analysis (ICA)-derived resting state networks (RSNs) under the influence of two different psychoactive drugs, the stimulant/psychedelic hybrid, MDMA, and the classic psychedelic, psilocybin.

Both were given in placebo-controlled designs and produced marked subjective effects, although reports of more profound changes in consciousness were given after psilocybin. Between-network RSFC was generally increased under psilocybin, implying that networks become less differentiated from each other in the psychedelic state.

Decreased RSFC between visual and sensorimotor RSNs was also observed. MDMA had a notably less marked effect on between-network RSFC, implying that the extensive changes observed under psilocybin may be exclusive to classic psychedelic drugs and related to their especially profound effects on consciousness.

The novel analytical approach applied here may be applied to other altered states of consciousness to improve our characterization of different conscious states and ultimately advance our understanding of the brain mechanisms underlying them.

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  • Patryk on The administration of psilocybin to healthy hallucinogen experienced volunteersHello everyone I'm on antidepressant from couple of years and I try many different types. Right now I have worst time ever. I try mushrooms which one found my self on last season 2016. I have found but that was very difficult for me. I go nearly ever…
  • terry hall on Help us treat depression!I would be very interested to hear about your research on your use of psychedelics , I would be very interested if you are looking for new volunteers for further trials , I am 50 years old and I have suffered with depression for 25 years and have fou…
  • Bob on The administration of psilocybin to healthy hallucinogen experienced volunteersHi, I have read your articles and I am currently on anti depressants. I have tried different kinds as I have mild PTSD from military service and suffer from depression constantly. I would very much like to assist and be a volunteer for future trials.
  • Chris noton on The administration of psilocybin to healthy hallucinogen experienced volunteersHello, I’m am 43 year old male living in oxford and suffered from depression and anxiety for 20 some years and I am a chronic suffer. I am very interested in participating on this type of drug trial. In my 20’s I have picked my own mushrooms once or…
  • Anonymous on Are you having a psychedelic experience in the near future?Hi All, I suffer from depression and anxiety and have done so for many years. After being placed on anti-depressants (again), I had a very bad response and the side effects of increased suicidal thoughts became unbearable. It was an everyday battle o…
  • J Moran on Help us treat depression!Hello, I am wondering if you have completed your research into the use of psychedelics to aid with depression. I suffer with it myself and want to know if you are still looking for volunteers? I am currently 20 years old, turning 21 in September. I a…
  • Leo Tognetti on The administration of psilocybin to healthy hallucinogen experienced volunteersHi Drew Thanks for sharing. What was your method?
  • Richard NAUGHTON on Help us treat depression!These mushrooms have powers beyond the understanding of the modern world that have been lost in translation since the dawn of man . I've used them and felt drawn to them and felt it was a calling . I collected them myself for 15 years ate them , drie…

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The effects of psilocybin and MDMA on between-network resting state functional connectivity
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