- ICH GCP
- US Clinical Trials Registry
- Clinical Trial NCT03119870
Organization of the Cingulate Cortex (EEG-Feedback)
July 6, 2017 updated by: Hospices Civils de Lyon
Structure-function Relationships Within the Cingulate Cortex
Efficient evaluation and monitoring of actions and outcomes are a key feature of primates' efficient adaptive cognition.
Deficits in evaluating one's own actions and their consequences is a key feature of prominent disorders such as obsessive compulsive disorders (OCD), schizophrenia, and anxiety.
The Investigators know that these evaluative processes implicate medial structures of the brain that are related both to old limbic functions and to more recently evolved higher executive functions.
Brain potentials related to performance monitoring have attracted a lot of interest in cognitive neuroscience but also in the clinical domain because they appear to be altered in different neurological or psychiatric disorders, such as schizophrenia, OCD, or anxiety, and could become biomarkers of pathologies.
But the neural sources of these markers are not fully determined and are currently highly debated.
In addition, our work suggests that non pathological factors, such as normal morphological cortical variations, could affect those markers.
Understanding performance monitoring, acting directly on medial cortex, or using electrophysiological markers in clinic are thus currently problematic and challenging.
This is mostly because structure-function relationships in the medial wall are ill defined for historical, conceptual, and methodological reasons.
Importantly, although individual variability of brain morphology impedes precise assessment of structure function relationships, this variability is almost never taken into account.
EEG-Feedback aims to resolve these issues by evaluating the consequences of individual variability in cingulate cortex morphology on 1) surface EEG markers of feedback monitoring and 2) functional connectivity patterns thanks to resting-state fMRI.
Study Overview
Study Type
Interventional
Enrollment (Actual)
31
Phase
- Not Applicable
Contacts and Locations
This section provides the contact details for those conducting the study, and information on where this study is being conducted.
Study Locations
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Bron, France, 69677
- Hospices Civils de Lyon, Groupement Hospitalier Est
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Participation Criteria
Researchers look for people who fit a certain description, called eligibility criteria. Some examples of these criteria are a person's general health condition or prior treatments.
Eligibility Criteria
Ages Eligible for Study
18 years to 40 years (Adult)
Accepts Healthy Volunteers
Yes
Genders Eligible for Study
All
Description
Inclusion Criteria:
- being able to provide a writen consent form
- having a social insurance
- have a normal vision (with or without corrections)
- Right-handed
Exclusion Criteria:
- Subjects with MRI contraindications (e.g. pacemaker, claustrophobia, metal in the body, etc…).
- Subjects must be willing to be advise in case of discovery of brain abnormality.
- No history of known neurological or psychiatric illness
- Pregnant or nursing women
- Persons under guardianship, curatorship or any other administrative or judicial measure of deprivation of rights or liberty, as well as legal persons protected by law
Study Plan
This section provides details of the study plan, including how the study is designed and what the study is measuring.
How is the study designed?
Design Details
- Primary Purpose: Basic Science
- Allocation: N/A
- Interventional Model: Single Group Assignment
- Masking: None (Open Label)
Arms and Interventions
Participant Group / Arm |
Intervention / Treatment |
---|---|
Experimental: 1
Each subject will conduct 3 sessions, i.e. a training session, an anatomical MRI session and an EEG session.
The first session will be to train the subject to carry out the different behavioral tasks that he will then have to perform during the session of EEG.
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Each subject will be trained to perform a trial-error learning task.
In this task, three visual stimuli will be presented to the subject.
The subject will have to find by trial-error, the one associated with positive feedback, the other stimuli being associated with negative feedback (search period).
Once the stimulus is associated with positive feedback, the subject will perform a period of repetition during which he will choose the stimulus associated with positive feedback.
Two variants of the task will be used: a variant in which feedback will be visual (ie positive feedback = green square, negative feedback = red square) and a variant in which feedback will be fruit juice (ie positive feedback = Fruit juice (but less than 2ml), negative feedback = no volume or small volume of fruit juice).
Once the tasks are learned, each subject will participate in an MRI session during which an anatomical scan will be obtained.
For each task, the time of presentation of the stimuli will be 2s.
During this time, the subject should indicate his choice of stimulus.
After a delay of 2s, feedback will be presented for 1s.
Each test shall be separated by an inter-test delay of 3s.
The presentation of the stimuli and the control of the answers will be managed by the E-prime or Presentation software.
Once the tasks are learned, each subject will participate in an MRI session during which an anatomical scan will be obtained and then an EEG session during which he will perform the task learned.For each task, the time of presentation of the stimuli will be 2s.
During this time, the subject should indicate his choice of stimulus.
After a delay of 2s, feedback will be presented for 1s.
Each test shall be separated by an inter-test delay of 3s.
The presentation of the stimuli and the control of the answers will be managed by the E-prime or Presentation software.
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What is the study measuring?
Primary Outcome Measures
Outcome Measure |
Measure Description |
Time Frame |
---|---|---|
Resting state fMRI data
Time Frame: 3 years
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BOLD signal will be analyzed in the low frequency band (0.1-0.01Hz).
Images must be not too much distorted to allow data analysis.
As such, if a subject moved too much (translation>10mm; rotation>5°) the corresponding data will be excluded from the analysis.
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3 years
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EEG data
Time Frame: 3 years
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If recordings are too noisy (if only <30% of trials survive the denoising process), subject will be excluded from final analysis.
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3 years
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Behavioral data in the EEG experiment
Time Frame: 3 years
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Performance in the task will be assessed.
If performance in the task is <80%, subjects will be excluded in the final analysis.
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3 years
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Collaborators and Investigators
This is where you will find people and organizations involved with this study.
Sponsor
Investigators
- Principal Investigator: Christian SCHEIBER, MD, Hospices Civils de Lyon
Study record dates
These dates track the progress of study record and summary results submissions to ClinicalTrials.gov. Study records and reported results are reviewed by the National Library of Medicine (NLM) to make sure they meet specific quality control standards before being posted on the public website.
Study Major Dates
Study Start (Actual)
January 9, 2013
Primary Completion (Actual)
September 6, 2013
Study Completion (Actual)
July 4, 2017
Study Registration Dates
First Submitted
March 9, 2017
First Submitted That Met QC Criteria
April 13, 2017
First Posted (Actual)
April 19, 2017
Study Record Updates
Last Update Posted (Actual)
July 11, 2017
Last Update Submitted That Met QC Criteria
July 6, 2017
Last Verified
July 1, 2017
More Information
Terms related to this study
Keywords
Other Study ID Numbers
- 69HCL16_0659
Drug and device information, study documents
Studies a U.S. FDA-regulated drug product
No
Studies a U.S. FDA-regulated device product
No
This information was retrieved directly from the website clinicaltrials.gov without any changes. If you have any requests to change, remove or update your study details, please contact register@clinicaltrials.gov. As soon as a change is implemented on clinicaltrials.gov, this will be updated automatically on our website as well.
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