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Studies of Blood Flow to the Brain During Thought

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ClinicalTrials.gov Identifier: NCT00001360
Recruitment Status : Recruiting
First Posted : November 4, 1999
Last Update Posted : March 17, 2023
Information provided by (Responsible Party):
National Institutes of Health Clinical Center (CC) ( National Institute of Mental Health (NIMH) )

Brief Summary:

The purpose of this study is to use brain imaging technology to measure changes in blood flow to areas in the brain as individuals perform intellectual tasks.

This study will use functional magnetic resonance imaging (fMRI) to examine blood flow to areas of the brain as participants engage in tasks associated with visual perception, visual recognition, and memory.

Condition or disease Intervention/treatment
Healthy Volunteer Drug: 0-15 Water

Detailed Description:


Our goal is to study the functional organization of the intact human brain by combining cognitive tasks and neuroimaging. Functional magnetic resonance imaging (fMRI), magnetoencephalography (MEG) and electroencephalography (EEG) will be used to measure brain activity in healthy human subjects engaged in performing cognitive tasks. These tasks will address specific questions concerning the neural systems that mediate perception, attention, memory, decision-making, emotion, plasticity and social interactions. fMRI and MEG, respectively, will be employed to investigate the spatial and temporal aspects of these neural systems.

Study Population:

Normal volunteer participants aged 18-65, who are in good general health will be recruited from the local community and studied under this minimal risk protocol.


Subjects will perform cognitive tasks in behavioral and/or neuroimaging sessions (fMRI or MEG).

Outcome Measures:

Behavior as performance on cognitive tasks, and brain activity (fMRI and MEG) will be combined to yield information about the neural correlates and processes underlying different aspects of human cognition including visual perception, memory, learning, emotion, social cognition, decision-making and attention.

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Study Type : Observational
Estimated Enrollment : 4100 participants
Observational Model: Cohort
Time Perspective: Cross-Sectional
Official Title: Regional Cerebral Blood Flow Studies of Object Perception, Identification, Localization, and Memory
Actual Study Start Date : September 17, 1993

Group/Cohort Intervention/treatment
Normal volunteer participants aged 18-65 who are in good general health.
Drug: 0-15 Water

Primary Outcome Measures :
  1. Cognitive tasks and neuroimaging. [ Time Frame: ongoing ]
    Cognitive tasks and neuroimaging.

Information from the National Library of Medicine

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Ages Eligible for Study:   18 Years to 65 Years   (Adult, Older Adult)
Sexes Eligible for Study:   All
Accepts Healthy Volunteers:   Yes
Sampling Method:   Non-Probability Sample
Study Population
Normal volunteer participants aged 18-65, who are in good general health will be recruited from the local community and studied under this minimal risk protocol.

Healthy adults, with at least a high school education, aged 18 to 65 years, will be recruited to participate in the study.


Subjects will be excluded if they:

  • are an NIMH employee or a relative
  • have evidence of, or a history of:
  • major medical, neurological or psychiatric illness
  • serious head injury
  • learning disability-drug or alcohol abuse or dependence in the past 3 months, except nicotine

-are taking prescription drugs or supplements that may affect brain function-

-have serious vision or hearing problems

In addition to the above, additional exclusion criteria apply for all MRI studies:

  • Female subjects who are pregnant or have a positive pregnancy test 24 hours prior to an experiment will be excluded from neuroimaging studies.
  • All subjects will be questioned prior to MRI scanning for possible occupational exposure to metal slivers or shavings, which may have become accidentally lodged in the tissues of the head or neck. Subjects with surgical clips or shrapnel in or near the brain or blood vessels, subjects with cochlear implants, subjects with any metallic body in the eye or CNS, and subjects with any form of implant wire or metal device which may concentrate radiofrequency fields will be excluded from MRI scanning experiments because of possible risks during MRI scanning. Those whose history is suggestive of such a problem will also be excluded from the MRI portion of the experiments. They may still participate in the behavioral and MEG experiments.
  • Subjects unable to lie flat on their back for up to 2 hours may not be eligible to participate in MRI scans.

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): NCT00001360

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Contact: NIMH LBC Volunteer (301) 827-5157 nimhlbcvolunteer@mail.nih.gov
Contact: Alex Martin, Ph.D. (301) 435-1926 alexmartin@mail.nih.gov

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United States, Maryland
National Institutes of Health Clinical Center Recruiting
Bethesda, Maryland, United States, 20892
Sponsors and Collaborators
National Institute of Mental Health (NIMH)
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Principal Investigator: Alex Martin, Ph.D. National Institute of Mental Health (NIMH)
Additional Information:
Publications automatically indexed to this study by ClinicalTrials.gov Identifier (NCT Number):

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Responsible Party: National Institute of Mental Health (NIMH)
ClinicalTrials.gov Identifier: NCT00001360    
Other Study ID Numbers: 930170
First Posted: November 4, 1999    Key Record Dates
Last Update Posted: March 17, 2023
Last Verified: January 31, 2023
Individual Participant Data (IPD) Sharing Statement:
Plan to Share IPD: Undecided
Plan Description: .The protocol team has not had the opportunity to discuss whether or not IPD data will be shared.

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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 National Institutes of Health Clinical Center (CC) ( National Institute of Mental Health (NIMH) ):
Visual Processing
Magnetic Resonance Imaging
Natural History