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Showing 1–24 of 1,848 matching trials from the live ClinicalTrials.gov search.
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Filters: Condition: Impaired Cognition Clear all
Completed Early Phase 1 Interventional

Docosahexaenoic Acid (DHA) To Prevent Development of Cognitive Dysfunction Due to Chemotherapy

NCT02517502
View directory record Official record
Conditions
Cognitive Dysfunction
Interventions
DHA, Placebo
Drug
Lead sponsor
Carol Fabian, MD
Other
Eligibility
18 Years to 65 Years · Female only
Enrollment
24 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2015 – 2019
U.S. locations
2
States / cities
Decatur, Illinois • Kansas City, Kansas
Source: ClinicalTrials.gov public record
Updated Jan 23, 2022 · Synced Jul 22, 2026, 9:36 AM EDT
Completed Not applicable Interventional

Exercise and Activities for Independent Living With Mild Cognitive Impairment (MCI)

NCT00446394
View directory record Official record
Conditions
Mild Cognitive Impairment, Dementia
Interventions
Resources and Activities for Life Long Independence (RALLI), Social Walking program (SW)
Behavioral
Lead sponsor
University of Washington
Other
Eligibility
70 Years and older
Enrollment
181 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2007 – 2012
U.S. locations
1
States / cities
Seattle, Washington
Source: ClinicalTrials.gov public record
Updated Oct 18, 2012 · Synced Jul 22, 2026, 9:36 AM EDT
Completed Not applicable Interventional

Humanity Neurotech Device Clinical Trial in Adults With Long COVID Cognitive Dysfunction

NCT06739668
View directory record Official record
Conditions
Post-Acute COVID-19 Syndrome, Cognitive Dysfunction
Interventions
Pascal device, Sham Device
Device
Lead sponsor
Icahn School of Medicine at Mount Sinai
Other
Eligibility
18 Years and older
Enrollment
30 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2024 – 2025
U.S. locations
1
States / cities
New York, New York
Source: ClinicalTrials.gov public record
Updated Feb 1, 2026 · Synced Jul 22, 2026, 9:36 AM EDT
Completed Not applicable Interventional Results available

Intervention to Reduce Sedentary Time

NCT02878486
View directory record Official record
Conditions
Mild Cognitive Impairment
Interventions
Jawbone Up, Physical Activity Education, ActivPAL
Device · Behavioral
Lead sponsor
University of Kansas Medical Center
Other
Eligibility
Not listed
Enrollment
6 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2016 – 2018
U.S. locations
1
States / cities
Kansas City, Kansas
Source: ClinicalTrials.gov public record
Updated Jul 28, 2019 · Synced Jul 22, 2026, 9:36 AM EDT
Recruiting No phase listed Observational

Characterization of Dysmorphology in Subjects With Creatine Transporter Deficiency

NCT05600946
View directory record Official record
Conditions
Cognitive Disorder, Metabolic Disease, Autism Spectrum Disorder
Interventions
Not listed
Lead sponsor
Eunice Kennedy Shriver National Institute of Child Health and Human Development (NICHD)
NIH
Eligibility
2 Years to 40 Years · Male only
Enrollment
19 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2022 – 2026
U.S. locations
1
States / cities
Bethesda, Maryland
Source: ClinicalTrials.gov public record
Updated Jun 3, 2026 · Synced Jul 22, 2026, 9:36 AM EDT
Active, not recruiting Phase 1 Interventional Accepts healthy volunteers

Door-Through-Door Companion Rideshare Technology for Individuals With Alzheimer's Disease and Related Dementias (AD/ADRD)

NCT06850870
View directory record Official record
Conditions
Alzheimer Disease or Associated Disorder, Dementia, Cognitive Decline
Interventions
Door-through-door companion rideshare, Curb-to-curb rideshare services
Other
Lead sponsor
Onward Health, Inc
Industry
Eligibility
60 Years and older
Enrollment
120 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2025 – 2026
U.S. locations
1
States / cities
San Leandro, California
Source: ClinicalTrials.gov public record
Updated Jul 20, 2026 · Synced Jul 22, 2026, 9:36 AM EDT
Completed No phase listed Observational Accepts healthy volunteers

A Study of Brain Aging in Vietnam War Veterans

NCT01687153
View directory record Official record
Conditions
Traumatic Brain Injury, Post Traumatic Stress Disorder, Alzheimer's Disease, Mild Cognitive Impairment
Interventions
Not listed
Lead sponsor
University of Southern California
Other
Eligibility
50 Years to 90 Years
Enrollment
289 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2012 – 2021
U.S. locations
19
States / cities
Sun City, Arizona • Irvine, California • La Jolla, California + 14 more
Source: ClinicalTrials.gov public record
Updated Nov 28, 2021 · Synced Jul 22, 2026, 9:36 AM EDT
Not yet recruiting Not applicable Interventional

AI-CONECT: A Conversational AI for Early Dementia Prevention in Socially-Isolated Older Adults

NCT07701668
View directory record Official record
Conditions
Mild Cognitive Impairment (MCI), Social Isolation
Interventions
AI-based conversational intervention
Behavioral
Lead sponsor
Massachusetts General Hospital
Other
Eligibility
75 Years and older
Enrollment
80 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2026 – 2028
U.S. locations
1
States / cities
Boston, Massachusetts
Source: ClinicalTrials.gov public record
Updated Jul 13, 2026 · Synced Jul 22, 2026, 9:36 AM EDT
Recruiting Phase 4 Interventional Accepts healthy volunteers

Elucidating the Role of Cholinergic Degeneration in Cognitive Fluctuations in Lewy Body Dementia

NCT07284290
View directory record Official record
Conditions
Dementia With Lewy Bodies, Parkinson Disease Dementia, Healthy Controls
Interventions
Syn-One skin biopsy, Multi modal MRI, Assessment of dynamic EEG features over 48-hour periods across all study aims, Plasma biomarkers, Galantamine HBr extended-release 8mg capsules (8mg ER).
Procedure · Diagnostic Test · Drug
Lead sponsor
Virginia Commonwealth University
Other
Eligibility
50 Years to 89 Years
Enrollment
120 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2025 – 2029
U.S. locations
1
States / cities
Richmond, Virginia
Source: ClinicalTrials.gov public record
Updated Mar 5, 2026 · Synced Jul 22, 2026, 9:36 AM EDT
Active, not recruiting Phase 2 Interventional

A Trial to Evaluate the Safety and Efficacy of Benfotiamine in Patients With Early Alzheimer's Disease (BenfoTeam)

NCT06223360
View directory record Official record
Conditions
Alzheimer Disease
Interventions
Low Dose Benfotiamine, High Dose Benfotiamine, Placebo
Drug
Lead sponsor
Alzheimer's Disease Cooperative Study (ADCS)
Other
Eligibility
50 Years to 89 Years
Enrollment
406 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2024 – 2027
U.S. locations
47
States / cities
Phoenix, Arizona • Scottsdale, Arizona • Sun City, Arizona + 35 more
Source: ClinicalTrials.gov public record
Updated Jun 3, 2026 · Synced Jul 22, 2026, 9:36 AM EDT
Not listed No phase listed Observational Accepts healthy volunteers

Neuroinflammation and Alzheimer's Pathology in POCD

NCT05378659
View directory record Official record
Conditions
Post-Operative Confusion, Neuroinflammatory Response, Alzheimer Disease
Interventions
Montreal Cognitive Assessment, Stroop Test, 4AT Delirium, Grooved Pegboard, NACC Cognitive Battery, ERP Testing, Blood Plasma and Serum sampling, Cerebral Spinal Fluid Sample
Behavioral · Diagnostic Test
Lead sponsor
University of Tennessee Graduate School of Medicine
Other
Eligibility
60 Years and older
Enrollment
120 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2021 – 2022
U.S. locations
1
States / cities
Knoxville, Tennessee
Source: ClinicalTrials.gov public record
Updated May 17, 2022 · Synced Jul 22, 2026, 9:36 AM EDT
Completed No phase listed Observational

BRS and Outcomes in Cardiothoracic Surgery

NCT03243279
View directory record Official record
Conditions
Pain, Postoperative, Atrial Fibrillation, Cognitive Dysfunction
Interventions
Not listed
Lead sponsor
Duke University
Other
Eligibility
18 Years and older
Enrollment
72 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2017 – 2022
U.S. locations
1
States / cities
Durham, North Carolina
Source: ClinicalTrials.gov public record
Updated Jul 20, 2022 · Synced Jul 22, 2026, 9:36 AM EDT
Completed Not applicable Interventional Results available

Recommendations and Alerting for Delirium Alleviation in Real-Time (RADAR)

NCT04007523
View directory record Official record
Conditions
Delirium
Interventions
Family Support System, HELP Support System
Behavioral
Lead sponsor
University of Michigan
Other
Eligibility
70 Years and older
Enrollment
60 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2019 – 2022
U.S. locations
1
States / cities
Ann Arbor, Michigan
Source: ClinicalTrials.gov public record
Updated Feb 20, 2024 · Synced Jul 22, 2026, 9:36 AM EDT
Completed Phase 2 Interventional Results available

Efficacy and Safety of Armodafinil as Adjunctive Therapy in Schizophrenic Adults With Cognitive Deficits

NCT00487942
View directory record Official record
Conditions
Schizophrenia
Interventions
armodafinil, placebo
Drug
Lead sponsor
Cephalon
Industry
Eligibility
18 Years to 60 Years
Enrollment
60 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2007
U.S. locations
12
States / cities
Garden Grove, California • National City, California • Paramount, California + 9 more
Source: ClinicalTrials.gov public record
Updated Jul 18, 2013 · Synced Jul 22, 2026, 9:36 AM EDT
Withdrawn No phase listed Observational Accepts healthy volunteers

Clinical Characteristics of Dementias That Occur Remotely After Traumatic Brain Injury in Retired Military Personnel

NCT01891383
View directory record Official record
Conditions
Dementia, Traumatic Brain Injury (TBI), Mild Cognitive Impairment (MCI), Chronic Traumatic Encephalopathy (CTE), Post-traumatic Stress Disorder (PTSD)
Interventions
Not listed
Lead sponsor
Uniformed Services University of the Health Sciences
Federal
Eligibility
50 Years to 95 Years
Healthy volunteers
Accepts healthy volunteers
Timeline
2013 – 2016
U.S. locations
2
States / cities
Yountville, California • Washington D.C., District of Columbia
Source: ClinicalTrials.gov public record
Updated Jan 17, 2019 · Synced Jul 22, 2026, 9:36 AM EDT
Not yet recruiting Not applicable Interventional Accepts healthy volunteers

iPACES v3 MCI NIA Protocol Copied for iPACES v4 PD NINDS

NCT05810454
View directory record Official record
Conditions
Parkinson's Disease, PD, Mild Cognitive Impairment, MCI
Interventions
iPACES (interactive Physical and Cognitive Exercise System), PACE (Physical and Cognitive Exercise)
Device
Lead sponsor
iPACES LLC
Industry
Eligibility
50 Years and older
Enrollment
120 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2023 – 2026
U.S. locations
1
States / cities
Clifton Park, New York
Source: ClinicalTrials.gov public record
Updated Apr 11, 2023 · Synced Jul 22, 2026, 9:36 AM EDT
Recruiting No phase listed Observational Accepts healthy volunteers

Alzheimer's Disease Treatment With Combination of 40Hz Light and Cognitive Therapy

NCT03657745
View directory record Official record
Conditions
Alzheimer Disease, Mild Cognitive Impairment, Dementia, Cognition Disorders in Old Age, Cognitive Decline, Cognitive Deterioration
Interventions
Combination of 40Hz light and cognitive therapy (ALZLIFE)
Device
Lead sponsor
Alzheimer's Light LLC
Industry
Eligibility
50 Years and older
Enrollment
2,000 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2018 – 2029
U.S. locations
1
States / cities
Miami, Florida
Source: ClinicalTrials.gov public record
Updated Jul 31, 2024 · Synced Jul 22, 2026, 9:36 AM EDT
Recruiting No phase listed Observational Accepts healthy volunteers

Longitudinal Cognitive Assessment by BoCA

NCT04114994
View directory record Official record
Conditions
Alzheimer Disease, Mild Cognitive Impairment, Vascular Dementia, Frontotemporal Dementia, Parkinson Disease, Multiple Sclerosis, TBI
Interventions
Boston Cognitive Assessment (BoCA)
Diagnostic Test
Lead sponsor
Alzheimer's Light LLC
Industry
Eligibility
50 Years and older
Enrollment
10,000 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2019 – 2029
U.S. locations
1
States / cities
Miami, Florida
Source: ClinicalTrials.gov public record
Updated Jul 31, 2024 · Synced Jul 22, 2026, 9:36 AM EDT
Completed Not applicable Interventional

Intellectual Impairment in Women With Breast Cancer

NCT00896324
View directory record Official record
Conditions
Breast Cancer
Interventions
Cognitive Rehabilitation, Active Neurofeedback Training, Neurofeedback Training (placebo / Sham)
Behavioral
Lead sponsor
Stanford University
Other
Eligibility
40 Years to 65 Years · Female only
Enrollment
50 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2009 – 2013
U.S. locations
1
States / cities
Stanford, California
Source: ClinicalTrials.gov public record
Updated Apr 30, 2019 · Synced Jul 22, 2026, 9:36 AM EDT
Completed Phase 1 Interventional Accepts healthy volunteers

Nicotinic Modulation of Schizophrenia-like Information Processing Deficits in Healthy Subjects

NCT00690170
View directory record Official record
Conditions
Healthy Subjects
Interventions
Ketamine, Nicotine, Placebo, Ketamine and Nicotine
Drug
Lead sponsor
Yale University
Other
Eligibility
18 Years to 50 Years
Enrollment
30 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2002 – 2009
U.S. locations
1
States / cities
West Haven, Connecticut
Source: ClinicalTrials.gov public record
Updated May 8, 2012 · Synced Jul 22, 2026, 9:36 AM EDT
Completed Not applicable Interventional Results available

Psychosocial Treatment for Attention Deficit Hyperactivity Disorder in Adults

NCT00278473
View directory record Official record
Conditions
Attention Deficit Disorder With Hyperactivity
Interventions
Meta-Cognitive Therapy, Supportive Therapy
Behavioral
Lead sponsor
Icahn School of Medicine at Mount Sinai
Other
Eligibility
18 Years to 65 Years
Enrollment
88 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2005 – 2008
U.S. locations
1
States / cities
New York, New York
Source: ClinicalTrials.gov public record
Updated Apr 3, 2017 · Synced Jul 22, 2026, 9:36 AM EDT
Withdrawn Not applicable Interventional Accepts healthy volunteers

Neuromodulation Effects in Older Adults

NCT06665022
View directory record Official record
Conditions
Cognitive Impairment, Cognitive Decline
Interventions
Active tDCS, Sham tDCS
Device
Lead sponsor
University of Florida
Other
Eligibility
60 Years to 95 Years
Healthy volunteers
Accepts healthy volunteers
Timeline
2024
U.S. locations
1
States / cities
Gainesville, Florida
Source: ClinicalTrials.gov public record
Updated Nov 20, 2024 · Synced Jul 22, 2026, 9:36 AM EDT
Completed Not applicable Interventional Accepts healthy volunteers

Changes in Cognition During a 24-h Simulated Military Operation

NCT04250480
View directory record Official record
Conditions
Cognitive Impairment
Interventions
beta-alanine, placebo
Dietary Supplement
Lead sponsor
University of Central Florida
Other
Eligibility
18 Years to 35 Years · Male only
Enrollment
40 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2017 – 2018
U.S. locations
1
States / cities
Orlando, Florida
Source: ClinicalTrials.gov public record
Updated Jan 30, 2020 · Synced Jul 22, 2026, 9:36 AM EDT
Completed Not applicable Interventional Accepts healthy volunteers Results available

Cognitive Remediation for Alcohol Use Disorder and Posttraumatic Stress Disorder

NCT02929979
View directory record Official record
Conditions
Alcohol Use Disorder, PTSD, Cognitive Dysfunction
Interventions
Cognitive Training, Cognitive training placebo control
Behavioral
Lead sponsor
VA Office of Research and Development
Federal
Eligibility
18 Years to 65 Years
Enrollment
90 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2015 – 2019
U.S. locations
1
States / cities
Palo Alto, California
Source: ClinicalTrials.gov public record
Updated Feb 10, 2021 · Synced Jul 22, 2026, 9:36 AM EDT