Hypnosis and hemispheric asymmetry

Naish, Peter L. N. (2010). Hypnosis and hemispheric asymmetry. Consciousness and Cognition, 19(1) pp. 230–234.

DOI: https://doi.org/10.1016/j.concog.2009.10.003

Abstract

Participants of low and high hypnotic susceptibility were tested on a temporal order judgement task, both with and without hypnosis. Judgements were made of the order of presentation of light flashes appearing in first one hemi-field then the other. There were differences in the inter-stimulus intervals required accurately to report the order, depending upon which hemi-field led. This asymmetry was most marked in hypnotically susceptible participants and reversed when they were hypnotised. This implies not only that brain activity changes in hypnosis, but also that there is a difference in brain function between people of low and high hypnotic susceptibility. The latter exhibited a faster-acting left hemisphere in the waking state, but faster right when hypnotised.

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