Working… Menu

Cognitive Adaptation (ADAPCO)

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. Identifier: NCT03119909
Recruitment Status : Unknown
Verified October 2018 by Hospices Civils de Lyon.
Recruitment status was:  Recruiting
First Posted : April 19, 2017
Last Update Posted : October 5, 2018
Information provided by (Responsible Party):
Hospices Civils de Lyon

Brief Summary:
A hallmark of our survival in the real world and of our capacity to navigate the complex social interactions of human society is our ability to show behavioral adaptation. Adaptation can be necessary for a number of reasons, making the study of the process challenging. Two classes of event can signal a need for adaptation: 1) Events caused by one's own actions and specifically FeedBack -FB- from those actions (e.g. the investigators adapt their strategy after an erroneous choice), and 2) Events not linked to our actions, specifically Action-InDependent Events -AiDE- (e.g. the investigators adapt their strategy after a change of rule). These two types of information - FB and AiDE - will frequently occur concurrently. A critical and difficult part of adapting appropriately involves resolving the difference between the two. So for example an incorrect FB can occur because the investigators made an error, or because something unexpected in the environment has changed -the rule switched, someone cheated, etc. The Investigators must work out which it is, as they will frequently require different behavioral adaptations. Their task is made even more complex by the fact that the dynamics of evidence accumulation after FB vs AiDE are very different. FB has a direct temporal and causal link to an executed action, which means that the investigators are certain to derive information about a given action from a given FB. In contrast, AiDE have no such contiguity and no initial relation to actions, which means that the investigators must accumulate evidence to identify the appropriate adaptation to an AiDE. So the crucial dilemma is this: after an unwanted outcome, should the investigators adapt as if they made an error and received a negative FB, or should they continue to accumulate evidence as if there has been an AiDE to which they need to know how to adapt. Animals are able to resolve this credit assignment problem, as evidenced by their ability to appropriately adapt their behavior. A breakdown of this ability to link unexpected events to their correct cause would seem to be at the source of impairments in a wide range of psychological and neurological disorders, from addiction and OCD to psychological symptoms in Parkinson's disease. Yet the neural basis of this process is currently unknown, and FB and AiDE processing have been assessed separately so far. ADAPCO will provide unprecedented characterization of brain systems critically involved in learning from and adapting to FB, AiDE, and their interactions, thanks to fMRI studies.

Condition or disease Intervention/treatment Phase
Healthy Other: First session of fMRI: localization of the premotor areas of the medial frontal cortex Other: Second fMRI session Other: Third fMRI Session Other: Training fMRI session Other: Pilot behavioral study Other: fMRI Study Not Applicable

Layout table for study information
Study Type : Interventional  (Clinical Trial)
Estimated Enrollment : 90 participants
Allocation: Non-Randomized
Intervention Model: Parallel Assignment
Masking: None (Open Label)
Primary Purpose: Basic Science
Official Title: Cognitive Adaptation and Frontal Cortex
Actual Study Start Date : September 24, 2015
Estimated Primary Completion Date : August 24, 2020
Estimated Study Completion Date : September 24, 2020

Arm Intervention/treatment
Learning of actions-events associations
Each subject will conduct 4 sessions, i.e. a training session and three fMRI sessions. The first session will consist in training the subject to carry out the different behavioral tasks that he will then have to perform during the sessions of fMRI.
Other: First session of fMRI: localization of the premotor areas of the medial frontal cortex
Subjects should perform simple tasks to map the premotor areas of the medial frontal cortex. In this context, they will have to perform hand, tongue, ocular movements for about 20s. Additionally, as part of a control condition, they will need to perform eye fixation on a cross shown at the center of the screen for about 20s.

Other: Second fMRI session
The subjects will position their left and right thumbs on response buttons. Each trial will begin with the appearance of one of 2 possible indexes. It will be an unknown abstract visual stimulus). After a variable delay of 0.5 to 6s (average = 2s), a blue or yellow circle will appear on the left or right of the screen.

Other: Third fMRI Session
This session is identical to the second session but the subject will have to respond by performing saccadic ocular responses.

Other: Training fMRI session
The training session will consist in training the subject to carry out the different behavioral tasks that he will then have to perform during the sessions of fMRI.

Learning of action-event associations not linked to action

This study is divided into two parts: a pilot behavioral study to determine the learning characteristics of non-action events and an fMRI study to study the neural networks involved in this type of learning.

30 subjects will participate in the behavioral study and 60 will participate in the fMRI study)

Other: Pilot behavioral study
In a pilot study, 30 subjects will participate in a behavioral study (2 sessions of 2 hours each) aimed at establishing the learning characteristics of the different types of rare events unrelated to actions (visual and sensorimotors on the hand).

Other: fMRI Study
Each subject will participate in 2 fMRI sessions of about 2 hours each: a first session in which a first version of the task will be presented and a second session in which the second version of the task will be presented.

Primary Outcome Measures :
  1. Behavioral data [ Time Frame: 3 years ]
    Performance in the task will be assessed. Only subjects with performance in the task >80% in the last functional run will be included in the final analysis.

  2. fMRI data [ Time Frame: 3 years ]
    BOLD signal will be analyzed in relation to the events of the task of all subjects. 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.

Information from the National Library of Medicine

Choosing to participate in a study is an important personal decision. Talk with your doctor and family members or friends about deciding to join a study. To learn more about this study, you or your doctor may contact the study research staff using the contacts provided below. For general information, Learn About Clinical Studies.

Layout table for eligibility information
Ages Eligible for Study:   20 Years to 45 Years   (Adult)
Sexes Eligible for Study:   All
Accepts Healthy Volunteers:   Yes

Inclusion Criteria:

  • being able to provide a written 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.
  • History of neurological or psychiatric illness
  • Pregnant or nursing women
  • Persons under guardianship, curatorship or any other administrative or judicial measure of deprivation of liberty

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 identifier (NCT number): NCT03119909

Layout table for location contacts
Contact: Philippe Domenech, MD
Contact: Céline Amiez, PhD 0472913450 ext +33

Layout table for location information
Hôpital Henri Mondor Recruiting
Creteil, France, 94000
Contact: Philippe Domenech, MD   
Sponsors and Collaborators
Hospices Civils de Lyon
Layout table for investigator information
Principal Investigator: Philippe Domenech, MD Hôpital Henri Mondor
Layout table for additonal information
Responsible Party: Hospices Civils de Lyon Identifier: NCT03119909    
Other Study ID Numbers: 69HCL16_0683
First Posted: April 19, 2017    Key Record Dates
Last Update Posted: October 5, 2018
Last Verified: October 2018

Layout table for additional information
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:
cingulate cortex
frontal cortex