Article (Scientific journals)
Hypnosis modulates behavioural measures and subjective ratings about external and internal awareness
Demertzi, Athina; VANHAUDENHUYSE, Audrey; Noirhomme, Quentin et al.
2015In Journal of Physiology - Paris, 109 (4), p. 173-179
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Keywords :
Hypnosis; Resting state; Awareness; Behaviour; Anticorrelations; Subjectivity; Meta-awareness; Reaction time; Lapses
Abstract :
[en] In altered subjective states, the behavioural quantification of external and internal awareness remains challenging due to the need for reports on the subjects’ behalf. With the aim to characterize the behavioural counterpart of external and internal awareness in a modified subjective condition, we used hypnosis during which subjects remain fully responsive. Eleven right-handed subjects reached a satisfactory level of hypnotisability as evidenced by subjective reports on arousal, absorption and dissociation. Compared to normal wakefulness, in hypnosis (a) participants’ self-ratings for internal awareness increased and self-ratings for external awareness decreased, (b) the two awareness components tended to anticorrelate less and the switches between external and internal awareness self-ratings were less frequent, and (c) participants’ reaction times were higher and lapses in key presses were more frequent. The identified imbalance between the two components of awareness is considered as of functional relevance to subjective (meta)cognition, possibly mediated by allocated attentional properties brought about by hypnosis. Our results highlight the presence of a cognitive counterpart in resting state, indicate that the modified contents of awareness are measurable behaviourally, and provide leverage for investigations of more challenging altered conscious states, such as anaesthesia, sleep and disorders of consciousness.
Disciplines :
Alternative medicine
Author, co-author :
Demertzi, Athina  ;  Université de Liège > Centre de recherches du cyclotron
VANHAUDENHUYSE, Audrey  ;  Centre Hospitalier Universitaire de Liège - CHU > Algologie - soins palliatifs
Noirhomme, Quentin ;  Université de Liège > Centre de recherches du cyclotron
FAYMONVILLE, Marie-Elisabeth ;  Centre Hospitalier Universitaire de Liège - CHU > Algologie - soins palliatifs
LAUREYS, Steven  ;  Centre Hospitalier Universitaire de Liège - CHU > Neurologie
Language :
English
Title :
Hypnosis modulates behavioural measures and subjective ratings about external and internal awareness
Publication date :
2015
Journal title :
Journal of Physiology - Paris
ISSN :
0928-4257
Publisher :
Elsevier Science, Paris, France
Volume :
109
Issue :
4
Pages :
173-179
Peer reviewed :
Peer Reviewed verified by ORBi
Available on ORBi :
since 26 March 2016

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