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Completed

NCT Number: NCT05306262

Interest of Catalepsy in the Hypnotic Trance

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.

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Key information

Conditions

Hypnosis Catalepsy Dissociative Disorders Dyskinesias Mental Disorders Nervous System Diseases Neurologic Manifestations Pathological Conditions, Signs and Symptoms Signs and Symptoms

Age range

18 year–75 year

Sex eligibility

All sexes

Study type

Interventional

Phase

Not applicable

Primary location

Institut Emergences

Rennes, France

About this study

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

Who can participate

Healthy volunteers accepted: Yes

Only the study team can determine whether someone qualifies for participation.

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

Treatment and study plan

Hypnosis session

Procedure

Comfort hypnosis: accompaniment of a pleasant memory.

Catalepsy

Other

Catalepsy of the hand.

Primary outcomes

  1. Parasympathetic tone

    Time frame: 30 minutes

    Analgesia Nociception Index (ANI)

Secondary outcomes

  1. Absorption

    Time frame: 30 minutes

    Numeric scale from 0 to 10 (0=not at all, 10=completely)

  2. Dissociation

    Time frame: 30 minutes

    Numeric scale from 0 to 10 (0=completely in the reality, 10=completely disconnected from reality)

  3. Time perception (minute)

    Time frame: 30 minutes

    Difference between the time of hypnosis session estimated by the patient and the actual time of hypnosis session (from closing to opening the eyes).

  4. Variation of Heart Rate (beat per minute)

    Time frame: 30 minutes

    Heart rate measured by a pulse oximeter

  5. Variation of Respiratory Rate (breath per minute)

    Time frame: 30 minutes

    Respiratory rate assessed by the investigator

Sponsors and collaborators

Lead sponsor

CMC Ambroise Paré

Other

Registry information

Official study title

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.

Acronym: CATALHYPNOANI

Important dates

Study start
2022
Primary completion
2022
Study completion
2022
First posted
Apr 1, 2022
Registry last updated
Apr 8, 2026

OpenTrials presents study information sourced from ClinicalTrials.gov. The official registry record should be consulted for the latest information.

View the official ClinicalTrials.gov record (opens in a new tab)

This listing is for discovery and informational purposes only. It is not medical advice, does not guarantee that a study is recruiting, and does not determine eligibility. Contact the study team and a qualified healthcare professional when considering participation.

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