CAN SUBJECTIVE RATINGS OF ABSORPTION, DISSOCIATION, AND TIME PERCEPTION DURING “NEUTRAL HYPNOSIS” PREDICT HYPNOTIZABILITY?: An exploratory study

Vanhaudenhuyse, Audrey; Ledoux, Didier; Gosseries, Olivia; Demertzi, Athena; Laureys, Steven; Faymonville, Marie-Élisabeth

doi:10.1080/00207144.2019.1553765

Cited by 26 publications

(19 citation statements)

References 16 publications

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“…Absorption is the "tendency to become fully involved in a perceptual, imaginative, or ideational experience" [59,60]. We asked subjects to answer this question: "Could you estimate on a 0-(not at all) to 10-(fully) scale how deeply you felt absorbed and felt your attention as focalized and focused by the experience you have just lived?"…”

Section: Psychological Outcomesmentioning

confidence: 99%

“…We asked subjects to answer this question: "Could you estimate on a 0-(not at all) to 10-(fully) scale how deeply you felt absorbed and felt your attention as focalized and focused by the experience you have just lived?" [60].…”

Section: Psychological Outcomesmentioning

confidence: 99%

“…Dissociation: is "a mental separation of components of experience that would ordinarily be processed together" [24,60]. We asked subjects to answer this question: "Could you estimate on a 0-to-10 scale if you felt a dissociation between your bodily sensation and the actual environment?…”

Section: Psychological Outcomesmentioning

confidence: 99%

“…We asked subjects to answer this question: "Could you estimate on a 0-to-10 scale if you felt a dissociation between your bodily sensation and the actual environment? Zero means you were in the reality, in this room; 10 means that you completely escaped in your subjective experience, totally disconnected from the here-and-now reality" [60].…”

Section: Psychological Outcomesmentioning

confidence: 99%

“…Time perception: we will ask subjects to estimate the time elapsed in minutes since they started the session. Time perception will be calculated as the absolute value of the real duration of the experience (hypnosis, VR, VRH) minus the subjects' estimated duration [60]. The experimenter will record the start and end times of the session.…”

Section: Psychological Outcomesmentioning

confidence: 99%

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Can hypnosis and virtual reality reduce anxiety, pain and fatigue among patients who undergo cardiac surgery: a randomised controlled trial

Rousseaux

Faymonville

Nyssen

et al. 2020

Trials

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Background: Different non-pharmacological techniques, including hypnosis and virtual reality (VR) are currently used as complementary tools in the treatment of anxiety, acute and chronic pain. A new technique called virtual reality hypnosis (VRH), which encompasses a combination of both tools, is regularly used although its benefits and underlying mechanisms remain unknown to date. With the goal to improve our understanding of VRH combination effects, it is necessary to conduct randomised and controlled research trials in order to understand their clinical interest and potential benefits.Methods: Patients (n = 100) undergoing cardiac surgery at the Liège University Hospital will be randomly assigned to one of four conditions (control, hypnosis, VR or VRH). Each patient will receive two sessions of one of the techniques: one the day before the surgery and one the day after. Physiological assessments will be made on the monitor and patients will rate their levels of anxiety, fatigue, pain, absorption and dissociation. Discussion: This study will help to expand knowledge on the application of virtual reality, hypnosis and VRH in the specific context of cardiac and intensive care procedures, and the influence of these non-pharmacological techniques on patient's anxiety, fatigue, pain and phenomenological experience.

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Section: Psychological Outcomesmentioning

confidence: 99%

Section: Psychological Outcomesmentioning

confidence: 99%

Section: Psychological Outcomesmentioning

confidence: 99%

Section: Psychological Outcomesmentioning

confidence: 99%

Section: Psychological Outcomesmentioning

confidence: 99%

See 3 more Smart Citations

Can hypnosis and virtual reality reduce anxiety, pain and fatigue among patients who undergo cardiac surgery: a randomised controlled trial

Rousseaux

Faymonville

Nyssen

et al. 2020

Trials

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Virtual reality hypnosis in the management of pain: Self‐reported and neurophysiological measures in healthy subjects

Rousseaux

Panda

Toussaint³

et al. 2022

European Journal of Pain

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Background Virtual reality hypnosis (VRH) has emerged as a new and promising option for pain management. Nonetheless, neural dynamics of pain modulation during VRH have not been investigated yet. The aim of this study was to measure the effects of VRH on pain, combining neurophysiological and self‐reported measurements. Methods Eighteen healthy subjects underwent noxious electrical stimulations in both normal wakefulness and VRH conditions. Dissociation, absorption, time perception, anxiety, pain intensity and unpleasantness, heart rate variability and breathing were reported for each condition. EEG signals were analysed using event‐related potentials (ERP) and time–frequency response (TFR) time‐locked to stimuli. Neurophysiological features were correlated with self‐reported data. Results VRH condition was associated with lower pain and higher dissociation. VRH significantly decreased amplitudes of N100 and P200 ERP components, reduced EEG power between 1 and 5 Hz from 100 to 560 ms, and increased EEG power from 5 to 11 Hz from 340 to 800 ms. These findings were observed at frontal, central and posterior electrodes. Heart rate variability was significantly higher and breathing frequency reduced with VRH. Correlations were found between the self‐reported level of pain and ERP components. Conclusion VRH modulates cerebral pain processes and body physiology, leading to reduced pain levels. These findings offer a first insight on the analgesic mechanisms of VRH and suggest that VRH is an effective approach to reduce experimental pain. Significance VRH decreases experimental pain perception, increases subject level of dissociation and modulates cerebral pain processing mechanisms. Pain can be managed with analgesic medication but also through complementary interventions. Among these, hypnosis and virtual reality (VR) are known to reduce pain for patients and healthy individuals. In recent years, an innovative technique combining hypnosis and VR has been proposed to help patients in managing pain. However, to our knowledge, no study has focused on the underlying mechanisms of this VR/hypnosis combination. We showed that VR combined with hypnosis decreases experimental pain, increases dissociation and influences EEG modulation.

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Effects of hand catalepsy on subjective trance perception and relative parasympathetic tone in healthy volunteers during pleasant hypnotic session: a randomized controlled study

Boselli,

Radoykov,

Paqueron

et al. 2024

J Clin Monit Comput

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Purpose: This study was designed to evaluate the effects on hand catalepsy on parasympathetic tone assessed using Analgesia/Nociception Index (ANI) and on subjective rating of absorption, dissociation, and time perception among healthy volunteers.Methods: This was a randomized controlled trial including participants to a medical hypnosis congress in France. Ninety volunteers were randomized in two arms, all receiving a fteen-minute positive hypnotic trance, with or without hand catalepsy. The relative parasympathetic tone assessed by ANI (Analgesia/Nociception Index), heart rate and respiratory rate were recorded at different times of the study protocol. The actual duration of the hypnotic session, calculated from eye closing to eye opening, was also recorded. At the end of the hypnotic trance, participants subjectively rated their level of absorption and dissociation on a 0-10 scale. They were also asked to estimate the duration of the hypnotic session from eye closing to eye opening.Results: In total, ninety subjects were included in the study. One subject was excluded because of deviation in the protocol standard, leaving eighty-nine subjects for analysis. Subject characteristics were similar between groups.There was a statistically different increase in ANI and decrease in both heart rate and respiratory rate over time with no difference with or without hand catalepsy. There was no statistically signi cant difference in absorption and dissociation subjective scales between groups. The median [Q1-Q3] actual duration of hypnotic sessions was similar between the catalepsy and the control groups (9 [8-10] min vs. 8 [7-10] min, respectively). However, subjects in the catalepsy group estimated a longer duration of the hypnotic session (12 [10-15] min) than in the control group (10 [5-10] min) with a mean ± SD overestimation of 3 ± 4 min (p<0.001).Conclusion: Parasympathetic comfort increased during the hypnotic trance with no difference between groups. However, adding a hand catalepsy to a pleasant hypnotic trance did not appear to increase feelings of absorption or dissociation but created time distortion on the longer side that could be useful in some clinical settings. Nevertheless, further study is still needed to determine more precisely the physiological and psychological effects on hand catalepsy during the hypnotic trance.

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CAN SUBJECTIVE RATINGS OF ABSORPTION, DISSOCIATION, AND TIME PERCEPTION DURING “NEUTRAL HYPNOSIS” PREDICT HYPNOTIZABILITY?: An exploratory study

Abstract: Au: The CrossRef database (www.crossref.org/) has been used to validate the references. Mismatches between the original manuscript and CrossRef are tracked in red font. Please provide a revision if the change is incorrect. Do not comment on correct changes.

Cited by 26 publications

References 16 publications

Can hypnosis and virtual reality reduce anxiety, pain and fatigue among patients who undergo cardiac surgery: a randomised controlled trial

Can hypnosis and virtual reality reduce anxiety, pain and fatigue among patients who undergo cardiac surgery: a randomised controlled trial

Virtual reality hypnosis in the management of pain: Self‐reported and neurophysiological measures in healthy subjects

Effects of hand catalepsy on subjective trance perception and relative parasympathetic tone in healthy volunteers during pleasant hypnotic session: a randomized controlled study

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