THE EFFECTS OF HYPNOSIS AND HYPNOTIC SUGGESTIONS ON THE MISMATCH NEGATIVITY IN HIGHLY HYPNOTIZABLE SUBJECTS |
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| Authors: | Seppo Hiltunen Maarit Virta Sakari Kallio Petri Paavilainen |
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| Affiliation: | 1. Teaching and Learning Services, University Services, University of Helsinki, Finland;2. Department of Psychology and Logopedics, Faculty of Medicine, University of Helsinki, Finland;3. Department of Psychology and Logopedics, Faculty of Medicine, University of Helsinki, Finland;4. Department of Cognitive Neuroscience and Philosophy, School of Bioscience, University of Sk?vde, Sweden;5. Centre for Cognitive Neuroscience, University of Turku, Finland;6. Cognitive Brain Research Unit, Department of Psychology and Logopedics, University of Helsinki, Finland |
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| Abstract: | The neural mechanisms associated with hypnosis were investigated in a group of 9 high hypnotizable subjects by measuring the mismatch negativity (MMN) component of the auditory event-related potential (ERP). ERPs were recorded using a passive oddball paradigm to sinusoidal standard and deviant tone stimuli of 500 and 520 Hz, respectively, in four conditions: prehypnosis, neutral hypnosis, hypnotic suggestion for altering the tone perception, and posthypnotic conditions. Earlier studies have indicated that hypnosis and hypnotic suggestions might have an effect on MMN, but the results of our study contradict these results: No statistically significant differences were found between the conditions in the MMN amplitudes. |
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