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ClinicalTrials.gov public records Last synced May 21, 2026, 11:07 PM EDT

Data is sourced from official ClinicalTrials.gov public API records. Always review the official ClinicalTrials.gov record for the latest information.

Showing 25–48 of 24 matching trials from the live ClinicalTrials.gov search.
Local D1 index available.
Filters: Condition: Cognitive Ability Clear all
Completed Phase 2 Interventional Accepts healthy volunteers Results available
View directory record Official record
Conditions
Down Syndrome, Intellectual Disability
Interventions
Memantine, Placebo
Drug
Lead sponsor
University Hospitals Cleveland Medical Center
Other
Eligibility
15 Years to 32 Years
Enrollment
160 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2014 – 2020
U.S. locations
1
States / cities
Cleveland, Ohio
Source: ClinicalTrials.gov public record
Updated Jun 26, 2023 · Synced May 21, 2026, 11:07 PM EDT
Not listed Not applicable Interventional Accepts healthy volunteers
View directory record Official record
Conditions
Motivation
Interventions
Direct tDCS, Indirect tDCS, Personalized tDCS, Sham tDCS
Device
Lead sponsor
Northeastern University
Other
Eligibility
65 Years to 80 Years
Enrollment
72 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2020
U.S. locations
1
States / cities
Boston, Massachusetts
Source: ClinicalTrials.gov public record
Updated Feb 12, 2020 · Synced May 21, 2026, 11:07 PM EDT
Completed No phase listed Observational Accepts healthy volunteers
View directory record Official record
Conditions
HIV-1-infection, Aging, Premature, Cognitive Impairment, Memory Impairment, HIV-Associated Cognitive Motor Complex
Interventions
Scopolamine Injectable Product, Mecamylamine Pill
Drug
Lead sponsor
Vanderbilt University Medical Center
Other
Eligibility
35 Years and older
Enrollment
22 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2015 – 2018
U.S. locations
1
States / cities
Nashville, Tennessee
Source: ClinicalTrials.gov public record
Updated Feb 24, 2019 · Synced May 21, 2026, 11:07 PM EDT
Completed No phase listed Observational Accepts healthy volunteers
View directory record Official record
Conditions
Anxiety Disorders, Child Developmental Disorders, Pervasive
Interventions
Not listed
Lead sponsor
University of California, Davis
Other
Eligibility
5 Years to 25 Years
Enrollment
511 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2005 – 2010
U.S. locations
1
States / cities
Sacramento, California
Source: ClinicalTrials.gov public record
Updated May 29, 2017 · Synced May 21, 2026, 11:07 PM EDT
Completed Not applicable Interventional Accepts healthy volunteers Results available
View directory record Official record
Conditions
Gait Disorder
Interventions
Balance rehabilitation + dual-tasking, Standard balance rehabilitation, Cognitive training (speed of processing), Cognitive training (general cognition)
Behavioral
Lead sponsor
VA Office of Research and Development
Federal
Eligibility
60 Years to 89 Years
Enrollment
34 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2013 – 2015
U.S. locations
2
States / cities
Decatur, Georgia • Mountain Home, Tennessee
Source: ClinicalTrials.gov public record
Updated Jun 18, 2017 · Synced May 21, 2026, 11:07 PM EDT
Completed Not applicable Interventional Results available
View directory record Official record
Conditions
TBI (Traumatic Brain Injury), Brain Injuries, Stress, Attention Deficit, Executive Dysfunction
Interventions
State regulation skill training, Treatment-as-usual
Behavioral · Other
Lead sponsor
VA Office of Research and Development
Federal
Eligibility
21 Years to 55 Years
Enrollment
18 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2017 – 2019
U.S. locations
1
States / cities
Sacramento, California
Source: ClinicalTrials.gov public record
Updated Mar 22, 2020 · Synced May 21, 2026, 11:07 PM EDT
Terminated Phase 3 Interventional Results available
View directory record Official record
Conditions
Brain Tumor
Interventions
IR Methylphenidate, Modafinil, SR Methylphenidate
Drug
Lead sponsor
M.D. Anderson Cancer Center
Other
Eligibility
18 Years and older
Enrollment
34 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2004 – 2009
U.S. locations
1
States / cities
Houston, Texas
Source: ClinicalTrials.gov public record
Updated Sep 22, 2020 · Synced May 21, 2026, 11:07 PM EDT
Completed Not applicable Interventional Accepts healthy volunteers
View directory record Official record
Conditions
Cognitive Ability, General, Immune System Function, Emotions
Interventions
Probiotics, placebo
Dietary Supplement
Lead sponsor
University of Utah
Other
Eligibility
12 Years to 20 Years
Enrollment
104 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2022 – 2024
U.S. locations
2
States / cities
Salt Lake City, Utah
Source: ClinicalTrials.gov public record
Updated May 3, 2026 · Synced May 21, 2026, 11:07 PM EDT
Completed No phase listed Observational
View directory record Official record
Conditions
Breast Cancer, Cognitive Ability, General, Fatigue, Pain, Psychosocial Deprivation, Radiation Toxicity, Skin Abnormalities
Interventions
DNA analysis, gene expression analysis, enzyme-linked immunosorbent assay, flow cytometry, laboratory biomarker analysis, questionnaire administration, adjuvant therapy, assessment of therapy complications, quality-of-life assessment, 3-dimensional conformal radiation therapy, breast irradiation, external beam radiation therapy, hypofractionated radiation therapy, intensity-modulated radiation therapy, whole breast irradiation
Genetic · Other · Procedure + 1 more
Lead sponsor
Wake Forest University Health Sciences
Other
Eligibility
18 Years and older · Female only
Enrollment
1,000 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2011 – 2014
U.S. locations
1
States / cities
Winston-Salem, North Carolina
Source: ClinicalTrials.gov public record
Updated Mar 27, 2023 · Synced May 21, 2026, 11:07 PM EDT
Not listed No phase listed Observational Accepts healthy volunteers
View directory record Official record
Conditions
Relapsing Remitting Multiple Sclerosis
Interventions
Not listed
Lead sponsor
Washington Neuropsychology Research Group
Other
Eligibility
25 Years to 50 Years
Enrollment
1 participant
Healthy volunteers
Accepts healthy volunteers
Timeline
2009 – 2011
U.S. locations
7
States / cities
Berkely, California • Lexington, Kentucky • Springfield, Massachusetts + 4 more
Source: ClinicalTrials.gov public record
Updated Jun 4, 2009 · Synced May 21, 2026, 11:07 PM EDT
Completed Phase 2 Interventional Accepts healthy volunteers
View directory record Official record
Conditions
Fibromyalgia
Interventions
Esreboxetine
Drug
Lead sponsor
Pfizer
Industry
Eligibility
18 Years to 65 Years
Enrollment
89 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2008 – 2009
U.S. locations
7
States / cities
Destin, Florida • Fort Walton Beach, Florida • Ann Arbor, Michigan + 4 more
Source: ClinicalTrials.gov public record
Updated Dec 3, 2018 · Synced May 21, 2026, 11:07 PM EDT
Completed Not applicable Interventional
View directory record Official record
Conditions
Schizophrenia
Interventions
Aerobic Exercise, Standard Psychiatric Treatment
Behavioral · Other
Lead sponsor
New York State Psychiatric Institute
Other
Eligibility
18 Years to 55 Years
Enrollment
41 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2012 – 2014
U.S. locations
1
States / cities
New York, New York
Source: ClinicalTrials.gov public record
Updated Aug 14, 2014 · Synced May 21, 2026, 11:07 PM EDT
Completed Early Phase 1 Interventional Results available
View directory record Official record
Conditions
Cannabis Use Disorder, Cannabis Withdrawal
Interventions
Progesterone, Placebo
Drug
Lead sponsor
Medical University of South Carolina
Other
Eligibility
18 Years to 45 Years · Female only
Enrollment
8 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2017 – 2018
U.S. locations
1
States / cities
Charleston, South Carolina
Source: ClinicalTrials.gov public record
Updated May 21, 2019 · Synced May 21, 2026, 11:07 PM EDT
Completed Phase 4 Interventional Accepts healthy volunteers
View directory record Official record
Conditions
Cognitive Impairment
Interventions
metaxalone m640, tizanidine
Drug
Lead sponsor
Primus Pharmaceuticals
Industry
Eligibility
20 Years to 70 Years
Enrollment
20 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2024 – 2025
U.S. locations
1
States / cities
Peoria, Arizona
Source: ClinicalTrials.gov public record
Updated Aug 21, 2025 · Synced May 21, 2026, 11:07 PM EDT
Not listed Not applicable Interventional
View directory record Official record
Conditions
Schizophrenia and Related Disorders
Interventions
Cognitive Enhancement Therapy, Social Skills Training
Behavioral
Lead sponsor
Beth Israel Deaconess Medical Center
Other
Eligibility
18 Years to 65 Years
Enrollment
378 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2021 – 2026
U.S. locations
5
States / cities
Hartford, Connecticut • Portland, Maine • Boston, Massachusetts + 1 more
Source: ClinicalTrials.gov public record
Updated Nov 13, 2023 · Synced May 21, 2026, 11:07 PM EDT
Completed Early Phase 1 Interventional Accepts healthy volunteers
View directory record Official record
Conditions
Self-Neglect, Cognitive Ability, General, Geriatric Disorder
Interventions
Comprehensive Geriatric Assessment and APS Usual Care, APS usual care
Other
Lead sponsor
The University of Texas Health Science Center, Houston
Other
Eligibility
65 Years and older
Enrollment
100 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2009 – 2012
U.S. locations
1
States / cities
Houston, Texas
Source: ClinicalTrials.gov public record
Updated Jun 17, 2013 · Synced May 21, 2026, 11:07 PM EDT
Completed Not applicable Interventional Accepts healthy volunteers Results available
View directory record Official record
Conditions
Aging, Cognitive Ability, General
Interventions
Moderate-aerobic walking, Positron Emission Tomography (PET) scan, Healthy living education, Physical activity monitor
Behavioral · Radiation · Device
Lead sponsor
University of Southern California
Other
Eligibility
55 Years to 80 Years
Enrollment
66 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2016 – 2022
U.S. locations
1
States / cities
Los Angeles, California
Source: ClinicalTrials.gov public record
Updated Oct 1, 2024 · Synced May 21, 2026, 11:07 PM EDT
Completed Not applicable Interventional
View directory record Official record
Conditions
Systemic Lupus Erythematosus
Interventions
Memantine, Placebo
Drug
Lead sponsor
Johns Hopkins University
Other
Eligibility
18 Years and older
Enrollment
61 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2006 – 2007
U.S. locations
1
States / cities
Baltimore, Maryland
Source: ClinicalTrials.gov public record
Updated Mar 6, 2008 · Synced May 21, 2026, 11:07 PM EDT
Completed Phase 2 Interventional Accepts healthy volunteers Results available
View directory record Official record
Conditions
Driving Performance, Cognitive Impairment, Sedation Complication, Mood
Interventions
300 mg Cannabidiol (CBD) oil, Placebo
Drug
Lead sponsor
West Virginia University
Other
Eligibility
18 Years to 30 Years
Enrollment
40 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2021
U.S. locations
1
States / cities
Morgantown, West Virginia
Source: ClinicalTrials.gov public record
Updated Sep 14, 2022 · Synced May 21, 2026, 11:07 PM EDT
Not listed No phase listed Observational Accepts healthy volunteers
View directory record Official record
Conditions
COVID Long-Haul, COVID-19, COVID-19 Pandemic, Brain Fog, Memory Deficits, Concentration Ability Impaired, Fatigue
Interventions
cross-sectional MRI and EEG assessments (NO INTERVENTION)
Other
Lead sponsor
San Francisco Veterans Affairs Medical Center
Federal
Eligibility
18 Years to 70 Years
Enrollment
150 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2021 – 2025
U.S. locations
1
States / cities
San Francisco, California
Source: ClinicalTrials.gov public record
Updated Apr 11, 2024 · Synced May 21, 2026, 11:07 PM EDT
Completed Not applicable Interventional Accepts healthy volunteers
View directory record Official record
Conditions
Positive Mood States, Negative Mood States, Cognitive Processing Speed, Cognitive Flexibility
Interventions
Twin Hearts Meditation
Behavioral
Lead sponsor
NeuroMeditation Institute
Other
Eligibility
18 Years to 75 Years
Enrollment
28 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2024
U.S. locations
1
States / cities
Eugene, Oregon
Source: ClinicalTrials.gov public record
Updated Jun 4, 2025 · Synced May 21, 2026, 11:07 PM EDT
Completed No phase listed Observational Accepts healthy volunteers
View directory record Official record
Conditions
Cognitive Deficits, Cognitive Ability, General
Interventions
Not listed
Lead sponsor
University of California, San Francisco
Other
Eligibility
6 Years to 12 Years
Enrollment
30 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2011 – 2012
U.S. locations
2
States / cities
Davis, California • San Francisco, California
Source: ClinicalTrials.gov public record
Updated Dec 11, 2013 · Synced May 21, 2026, 11:07 PM EDT
Completed Phase 4 Interventional Results available
View directory record Official record
Conditions
Down Syndrome
Interventions
Memantine, Placebo
Drug
Lead sponsor
University of Colorado, Denver
Other
Eligibility
18 Years to 32 Years
Enrollment
42 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2008 – 2011
U.S. locations
1
States / cities
Aurora, Colorado
Source: ClinicalTrials.gov public record
Updated Jan 31, 2013 · Synced May 21, 2026, 11:07 PM EDT
Completed No phase listed Observational Accepts healthy volunteers
View directory record Official record
Conditions
Asthma
Interventions
Functional and Structural Magnetic Resonance Imaging (research grade), Cognitive Function Testing (non-diagnostic), Asthma and Psychological Questionnaires (non-diagnostic)
Other
Lead sponsor
University of Texas Southwestern Medical Center
Other
Eligibility
40 Years to 69 Years
Enrollment
130 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2019 – 2025
U.S. locations
2
States / cities
Dallas, Texas
Source: ClinicalTrials.gov public record
Updated Jul 8, 2025 · Synced May 21, 2026, 11:07 PM EDT