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Organization of the Cingulate Cortex (EEG-Feedback)

The safety and scientific validity of this study is the responsibility of the study sponsor and investigators. Listing a study does not mean it has been evaluated by the U.S. Federal Government. Read our disclaimer for details.
 
ClinicalTrials.gov Identifier: NCT03119870
Recruitment Status : Completed
First Posted : April 19, 2017
Last Update Posted : July 11, 2017
Sponsor:
Information provided by (Responsible Party):
Hospices Civils de Lyon

Brief Summary:
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.

Condition or disease Intervention/treatment Phase
Healthy Other: Train Other: MRI Other: EEG Not Applicable

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Study Type : Interventional  (Clinical Trial)
Actual Enrollment : 31 participants
Allocation: N/A
Intervention Model: Single Group Assignment
Masking: None (Open Label)
Primary Purpose: Basic Science
Official Title: Structure-function Relationships Within the Cingulate Cortex
Actual Study Start Date : January 9, 2013
Actual Primary Completion Date : September 6, 2013
Actual Study Completion Date : July 4, 2017

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.
Other: Train
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).

Other: MRI
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.

Other: EEG
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.




Primary Outcome Measures :
  1. Resting state fMRI data [ Time Frame: 3 years ]
    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.

  2. EEG data [ Time Frame: 3 years ]
    If recordings are too noisy (if only <30% of trials survive the denoising process), subject will be excluded from final analysis.

  3. Behavioral data in the EEG experiment [ Time Frame: 3 years ]
    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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Ages Eligible for Study:   18 Years to 40 Years   (Adult)
Sexes Eligible for Study:   All
Accepts Healthy Volunteers:   Yes
Criteria

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

Information from the National Library of Medicine

To learn more about this study, you or your doctor may contact the study research staff using the contact information provided by the sponsor.

Please refer to this study by its ClinicalTrials.gov identifier (NCT number): NCT03119870


Locations
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France
Hospices Civils de Lyon, Groupement Hospitalier Est
Bron, France, 69677
Sponsors and Collaborators
Hospices Civils de Lyon
Investigators
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Principal Investigator: Christian SCHEIBER, MD Hospices Civils de Lyon
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Responsible Party: Hospices Civils de Lyon
ClinicalTrials.gov Identifier: NCT03119870    
Other Study ID Numbers: 69HCL16_0659
First Posted: April 19, 2017    Key Record Dates
Last Update Posted: July 11, 2017
Last Verified: July 2017

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Studies a U.S. FDA-regulated Drug Product: No
Studies a U.S. FDA-regulated Device Product: No
Keywords provided by Hospices Civils de Lyon:
fMRI
EEG
behavior
cingulate cortex