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Externalization and Stimulation

NCT05936307 · Status: UNKNOWN · Phase: NA · Type: INTERVENTIONAL · Enrollment: 30

Last updated 2024-03-07

No results posted yet for this study

Summary

The distinction between self-generated and external information is impaired in patients with schizophrenia, who are assumed to confuse imagination with real perceptions. To better understand the underlying mechanisms of these abnormalities, the investigator will investigate the brain mechanisms supporting auditory externalization. Auditory externalization is the ability to perceive whether a sound comes from inside or outside oneself. Our study, in healthy participants, will use functional brain imaging to identify the brain areas involved in the externalization of sound sources and to test whether neuromodulation of this area can modify this ability and provide a therapeutic lead in pathological populations

Conditions

  • Healthy Participants

Interventions

PROCEDURE

High-definition transcranial direct current (HD-tDCS), active condition

Participants will receive a session of active HD-tDCS at a current intensity of 2 mA for a duration of 25min. The placement of electrodes will be determined to specifically target the brain area that has been identified as being involved in the process of externalization, as evidenced by fMRI. During the stimulation, participants will be engaged in a computer-based externalization task.

PROCEDURE

High-definition transcranial direct current (HD-tDCS), placebo condition

Participants will receive a session of placebo HD-tDCS, which will be delivered following the same procedures as active HD-tDCS but the intensity of the current will be set at 2mA during the 30 first seconds at the beginning of the 25-min period of the stimulation, and equal to 0 mA for the reminding period of stimulation to simulate the tingling sensation often experienced by individuals during active stimulation. The placement of electrodes will be determined to specifically target the brain area that has been identified as being involved in the process of externalization, as evidenced by fMRI. During the stimulation, participants will be engaged in a computer-based externalization task

Sponsors & Collaborators

  • Hôpital le Vinatier

    lead OTHER

Principal Investigators

  • Marine MONDINO, Phd · hospital le Vinatier

Study Design

Allocation
RANDOMIZED
Purpose
BASIC_SCIENCE
Masking
TRIPLE
Model
CROSSOVER

Eligibility

Min Age
18 Years
Max Age
30 Years
Sex
ALL
Healthy Volunteers
Yes

Timeline & Regulatory

Start
2024-01-16
Primary Completion
2025-01-16
Completion
2025-09-30

Countries

  • France

Study Locations

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Read the full study record

This page highlights key information. For complete eligibility criteria, study locations, investigator contacts, and the full protocol, visit the original record on ClinicalTrials.gov.

View NCT05936307 on ClinicalTrials.gov