Neural changes after taking psychedelic drugs may reflect “heightened consciousness”

By Emma Young Is there anything psychedelic drugs can’t do? A recent wave of scientific scrutiny has revealed that they can elicit “spiritual” experiences, alleviate end-of-life angst, and perhaps treat depression – and they might achieve at least some of all this by “heightening consciousness”, according to a new paper published in the journal Scientific Reports. A team at the University of Sussex, led by Anil Seth, co-director of the Sackler Centre for Consciousness Science, re-analysed existing magneto-encephalography (MEG) brain imaging data recorded from healthy people who had taken doses of either psilocybin (the psychoactive ingredient in magic mushrooms), LSD or ketamine in the lab and then focused on their ensuing experience. MEG uses magnetic fields at the brain’s surface to identify patterns of neural activity – it’s very sensitive to changes from one moment to the next but not so accurate in terms of locating activity. Compared with people in a normal waking state, all the dosed-up volunteers, regardless of which drug they’d taken, showed a “sustained increase in neural diversity”. “During the psychedelic state, the electrical activity of the brain is less predictable and less ‘integrated’ than during normal conscious wakefulness – as measured by ‘global signal diversity’,” Seth explained in a press release from the university. Since this unpredictability and diversity is greater in peop...
Source: BPS RESEARCH DIGEST - Category: Psychiatry & Psychology Authors: Tags: Brain Cognition Perception Source Type: blogs