Interest of Catalepsy in the Hypnotic Trance

Study Overview
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Brief Summary
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Catalepsy seems to facilitate hypnotic induction and deepen hypnotic trance, although no work confirms the usefulness of this technique which is in common use in hypnosis. Furthermore, it has been shown that the hypnotic trance state is accompanied by an increase in parasympathetic tone, the non-invasive measurement of which is easy by the ANI monitor (Analgesia Nociception Index). The research hypothesis is that, by adding a body dissociation, catalepsy could facilitate and intensify the hypnotic trance, the intensity of which can be monitored and is proportional to the parasympathetic tone.

Detailed Description
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After randomization, subjects will either benefit from the normal hypnotic trance, or from the hypnotic trance associated with catalepsy of the hand. T0 = installation in a sitting position and collection of an accompanying theme T1 = induction of the hypnotic trance (closing eyes) with restitution of the theme to the patient and suggestion of comfort over a period of 5 to 10 min T2 = validation of comfort by a pre-established signal T3 = return to consciousness (opening eyes) T4 = end of questionnaire about absorption, dissociation and time perception

Official Title
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Effects of Catalepsy on the Parasympathetic Tone Assessed by ANI (Analgesia/Nociception Index) and on Absorption, Dissociation and Perception of Time During the Hypnotic Trance.

Conditions
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Hypnosis

Intervention / Treatment
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* Procedure: Hypnosis session
* Other: Catalepsy


Participation Criteria
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Eligibility Criteria
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Inclusion Criteria: Healthy Volunteers Consent for participation Affiliation to the social security system Exclusion Criteria: Arrhythmia (atrial fibrillation, pacemaker, defibrillator) Autonomic nervous system disorder (paraplegia, epilepsy, etc.) Pregnant or breastfeeding woman Patients under protection of the adults (guardianship, curators or safeguard of justice) Communication difficulties

Ages Eligible for Study
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Minimum Age: 18 Years
Maximum Age: 75 Years

Sexes Eligible for Study
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All

Accepts Healthy Volunteers
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Accepts Healthy Volunteers

Study Plan
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How is the study designed?
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Design Details

Primary Purpose: Other
Allocation: Randomized
Intervention Model: Parallel Assignment
Masking: None (Open Label)


Arms and Interventions

| Participant Group/Arm | Intervention/Treatment |
| --- | --- |
| Active Comparator: hypnotic trance<br>Hypnosis session of comfort for 20 minutes | Procedure: Hypnosis session<br>* Comfort hypnosis: accompaniment of a pleasant memory.<br>|
| Experimental: hypnotic trance + catalepsy<br>Catalepsy + Hypnosis session of comfort for 20 minutes | Procedure: Hypnosis session<br>* Comfort hypnosis: accompaniment of a pleasant memory.<br>Other: Catalepsy<br>* Catalepsy of the hand.<br>|

What is the study measuring?
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Primary Outcome Measures

| Outcome Measure | Measure Description | Time Frame |
| --- | --- | --- |
| Parasympathetic tone | Analgesia Nociception Index (ANI) | 30 minutes | 

Secondary Outcome Measures

| Outcome Measure | Measure Description | Time Frame |
| --- | --- | --- |
| Absorption | Numeric scale from 0 to 10 (0=not at all, 10=completely) | 30 minutes | 
| Dissociation | Numeric scale from 0 to 10 (0=completely in the reality, 10=completely disconnected from reality) | 30 minutes | 
| Time perception (minute) | Difference between the time of hypnosis session estimated by the patient and the actual time of hypnosis session (from closing to opening the eyes). | 30 minutes | 
| Variation of Heart Rate (beat per minute) | Heart rate measured by a pulse oximeter | 30 minutes | 
| Variation of Respiratory Rate (breath per minute) | Respiratory rate assessed by the investigator | 30 minutes | 

 Terms related to the study
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Keywords Provided by Centre Hospitalier Valida
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Hypnosis, Catalepsy, Parasympathetic tone, Absorption, Dissociation, Perception of time