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The entropic brain: a theory of conscious states informed by neuroimaging research with psychedelic drugs (with 7 co-authors)

Robin Carhart-Harris · 3 Feb 2014

Read the paper on pmc.ncbi.nlm.nih.gov ↗

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Robin Carhart-Harris did not write this page.

Every claim below was made in this piece, quoted word for word and numbered in the order the piece makes them, so you can read it there rather than take our word for it. The sentence above each quote is our reading of the claim, not their wording. Each quote was checked against a stored copy of the page at build time; where the two differ, the quote is the fact.

  1. Our reading

    The psychedelic state is an example of a primitive state of consciousness that preceded normal adult waking consciousness.

    Their wordsThe psychedelic state is considered an exemplar of a primitive or primary state of consciousness that preceded the development of modern, adult, human, normal waking consciousness.

  2. Our reading

    In normal waking consciousness the brain may operate just below criticality.

    Their wordsMoreover, if primary states are critical, then this suggests that entropy is suppressed in normal waking consciousness, meaning that the brain operates just below criticality.

  3. Our reading

    Normal waking consciousness gets its constrained quality, including self-awareness, from suppressed brain entropy.

    Their wordsIt is argued that this entropy suppression furnishes normal waking consciousness with a constrained quality and associated metacognitive functions, including reality-testing and self-awareness.

  4. Our reading

    Entering primary states of consciousness depends on a collapse of organised activity in the default-mode network.

    Their wordsIt is also proposed that entry into primary states depends on a collapse of the normally highly organized activity within the default-mode network (DMN) and a decoupling between the DMN and the medial temporal lobes (which are normally significantly coupled).

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