A1 Journal article – refereed

Segregated brain state during hypnosis




List of Authors: Tuominen Jarno, Kallio Sakari, Kaasinen Valtteri, Railo Henry

Publisher: Oxford Academic

Publication year: 2021

Journal: Neuroscience of Consciousness

Journal acronym: Neurosci Consc

Volume number: 2021

Issue number: 1

DOI: http://dx.doi.org/10.1093/nc/niab002

URL: https://academic.oup.com/nc/article/2021/1/niab002/6166137?guestAccessKey=b3098a60-0cdc-4981-99cb-add974c5b0dd


Abstract

Can the brain be shifted into a different state using a simple social cue, as tests on highly hypnotizable subjects would suggest? Demonstrating an altered global brain state is difficult. Brain activation varies greatly during wakefulness and can be voluntarily influenced. We measured the complexity of electrophysiological response to transcranial magnetic stimulation in one ‘hypnotic virtuoso’. Such a measure produces a response arguably outside the subject’s voluntary control and has been proven adequate for discriminating conscious from unconscious brain states. We show that a single-word hypnotic induction robustly shifted global neural connectivity into a state where activity remained sustained but failed to ignite strong, coherent activity in frontoparietal cortices. Changes in perturbational complexity indicate a similar move towards a more segregated state. We interpret these findings to suggest a shift in the underlying state of the brain, likely moderating subsequent hypnotic responding.


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Last updated on 2021-05-11 at 08:56