Reference : Neural mechanisms of antinociceptive effects of hypnosis.
Scientific journals : Article
Human health sciences : Alternative medicine
Human health sciences : Neurology
Human health sciences : Anesthesia & intensive care
http://hdl.handle.net/2268/9577
Neural mechanisms of antinociceptive effects of hypnosis.
English
Faymonville, Marie mailto [Centre Hospitalier Universitaire de Liège - CHU > > Anesthésie et réanimation >]
Laureys, Steven mailto [Université de Liège - ULg > > Centre de recherches du cyclotron >]
Degueldre, Christian [Université de Liège - ULg > > Centre de recherches du cyclotron >]
DelFiore, Guy [> > > >]
Luxen, André mailto [Université de Liège - ULg > Département de chimie (sciences) > Chimie organique de synthèse - Centre de recherches du cyclotron >]
Franck, Georges [Université de Liège - ULg > > Relations académiques et scientifiques (Médecine) >]
Lamy, Maurice mailto [Université de Liège - ULg > Département des sciences cliniques > Département des sciences cliniques >]
Maquet, Pierre mailto [Centre Hospitalier Universitaire de Liège - CHU > > Neurologie Sart Tilman >]
2000
Anesthesiology
Lippincott Williams & Wilkins
92
5
1257-67
Yes
International
0003-3022
1528-1175
Philadelphia
PA
[en] Adult ; Cerebrovascular Circulation ; Eidetic Imagery ; Female ; Hot Temperature ; Humans ; Hypnosis ; Magnetic Resonance Imaging ; Male ; Middle Aged ; Pain Measurement ; Pain Threshold ; Regression Analysis ; Rest ; Tomography, Emission-Computed
[en] BACKGROUND: The neural mechanisms underlying the modulation of pain perception by hypnosis remain obscure. In this study, we used positron emission tomography in 11 healthy volunteers to identify the brain areas in which hypnosis modulates cerebral responses to a noxious stimulus. METHODS: The protocol used a factorial design with two factors: state (hypnotic state, resting state, mental imagery) and stimulation (warm non-noxious vs. hot noxious stimuli applied to right thenar eminence). Two cerebral blood flow scans were obtained with the 15O-water technique during each condition. After each scan, the subject was asked to rate pain sensation and unpleasantness. Statistical parametric mapping was used to determine the main effects of noxious stimulation and hypnotic state as well as state-by-stimulation interactions (i.e., brain areas that would be more or less activated in hypnosis than in control conditions, under noxious stimulation). RESULTS: Hypnosis decreased both pain sensation and the unpleasantness of noxious stimuli. Noxious stimulation caused an increase in regional cerebral blood flow in the thalamic nuclei and anterior cingulate and insular cortices. The hypnotic state induced a significant activation of a right-sided extrastriate area and the anterior cingulate cortex. The interaction analysis showed that the activity in the anterior (mid-)cingulate cortex was related to pain perception and unpleasantness differently in the hypnotic state than in control situations. CONCLUSIONS: Both intensity and unpleasantness of the noxious stimuli are reduced during the hypnotic state. In addition, hypnotic modulation of pain is mediated by the anterior cingulate cortex.
http://hdl.handle.net/2268/9577
also: http://hdl.handle.net/2268/9579

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