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ClinicalTrials.gov public records Last synced Nov 1, 2026, 12:22 AM EDT

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

Showing 1297–1320 of 1,884 matching trials from the live ClinicalTrials.gov search.
Filters: Condition: Impaired Cognition Clear all
Completed No phase listed Observational Accepts healthy volunteers

Posturing Effects on Perception of Time and Perceptions of the Provider-Patient Interaction in the Emergency Department

NCT00170105
View directory record Official record
Conditions
Healthy
Interventions
Not listed
Lead sponsor
Mayo Clinic
Other
Eligibility
18 Years and older
Enrollment
244 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2005 – 2006
U.S. locations
1
States / cities
Rochester, Minnesota
Source: ClinicalTrials.gov public record
Updated Feb 2, 2010 · Synced Nov 1, 2026, 12:22 AM EDT
Completed Phase 3 Interventional Results available

Hormone and Information Processing Study

NCT00539305
View directory record Official record
Conditions
Mild Cognitive Impairment, Alzheimer's Disease
Interventions
testosterone gel, placebo gel
Drug
Lead sponsor
University of Washington
Other
Eligibility
60 Years to 90 Years · Male only
Enrollment
22 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2009 – 2012
U.S. locations
1
States / cities
Seattle, Washington
Source: ClinicalTrials.gov public record
Updated Jul 14, 2014 · Synced Nov 1, 2026, 12:22 AM EDT
Recruiting Not applicable Interventional Accepts healthy volunteers

Working Memory and Physical Exercise Training in Patients With Mild Cognitive Impairment

NCT05948930
View directory record Official record
Conditions
Mild Cognitive Impairment
Interventions
Progressive aerobic exercise, Adaptive cognitive training, Combined
Behavioral
Lead sponsor
University of Maryland, Baltimore
Other
Eligibility
50 Years to 80 Years
Enrollment
90 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2024 – 2027
U.S. locations
1
States / cities
Baltimore, Maryland
Source: ClinicalTrials.gov public record
Updated May 12, 2026 · Synced Nov 1, 2026, 12:22 AM EDT
Completed Phase 2 Interventional Results available

Study of Lisdexamfetamine Sulfate to Treat Cognitive Dysfunction in Multiple Sclerosis

NCT01615887
View directory record Official record
Conditions
Multiple Sclerosis
Interventions
lisdexamfetamine sulfate, placebo
Drug
Lead sponsor
State University of New York at Buffalo
Other
Eligibility
18 Years to 55 Years
Enrollment
63 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2009 – 2011
U.S. locations
1
States / cities
Buffalo, New York
Source: ClinicalTrials.gov public record
Updated Sep 16, 2022 · Synced Nov 1, 2026, 12:22 AM EDT
Completed Not applicable Interventional Accepts healthy volunteers

Acute Raspberry Intake on Metabolic Control and Cognitive Function

NCT03743792
View directory record Official record
Conditions
Aging, Age-related Cognitive Decline, Obesity
Interventions
Active breakfast, Control breakfast
Dietary Supplement
Lead sponsor
USDA Human Nutrition Research Center on Aging
Federal
Eligibility
55 Years to 70 Years
Enrollment
6 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2019 – 2023
U.S. locations
1
States / cities
Boston, Massachusetts
Source: ClinicalTrials.gov public record
Updated May 10, 2023 · Synced Nov 1, 2026, 12:22 AM EDT
Completed Phase 1 Interventional Results available

Multiple Ascending Doses of PF-04958242 in Subjects With Stable Schizophrenia

NCT02332798
View directory record Official record
Conditions
Schizophrenia
Interventions
PF-04958242, Placebo
Drug
Lead sponsor
Biogen
Industry
Eligibility
18 Years to 55 Years
Enrollment
39 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2015
U.S. locations
1
States / cities
Long Beach, California
Source: ClinicalTrials.gov public record
Updated Oct 25, 2021 · Synced Nov 1, 2026, 12:22 AM EDT
Terminated Phase 2 Interventional Accepts healthy volunteers Results available

Imaging Tau in Alzheimer's Disease and Normal Aging

NCT02884492
View directory record Official record
Conditions
Alzheimer's Disease
Interventions
18F-THK-5351, Lumbar Puncture (optional)
Drug · Procedure
Lead sponsor
William Charles Kreisl
Other
Eligibility
50 Years and older
Enrollment
17 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2016 – 2017
U.S. locations
1
States / cities
New York, New York
Source: ClinicalTrials.gov public record
Updated Nov 19, 2018 · Synced Nov 1, 2026, 12:22 AM EDT
Terminated Phase 2 Interventional Results available

11C-Acetate PET/CT Imaging As a Biomarker of Amyloid-Induced Neuroinflammation

NCT02811744
View directory record Official record
Conditions
Mild Cognitive Impairment
Interventions
11C-acetate
Drug
Lead sponsor
University of Pennsylvania
Other
Eligibility
65 Years and older
Enrollment
11 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2017 – 2022
U.S. locations
1
States / cities
Philadelphia, Pennsylvania
Source: ClinicalTrials.gov public record
Updated Jan 11, 2024 · Synced Nov 1, 2026, 12:22 AM EDT
Not listed Phase 4 Interventional

Huperzine-A to Help With Mental Problems and the Inability to Care for Onself in Patients With Schizophrenia

NCT01012830
View directory record Official record
Conditions
Schizophrenia, Dementia
Interventions
Huperzine A
Drug
Lead sponsor
VA Nebraska Western Iowa Health Care System
Federal
Eligibility
19 Years to 59 Years
Enrollment
15 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2009 – 2011
U.S. locations
1
States / cities
Omaha, Nebraska
Source: ClinicalTrials.gov public record
Updated Nov 13, 2009 · Synced Nov 1, 2026, 12:22 AM EDT
Recruiting No phase listed Observational Accepts healthy volunteers

OCT Angiography and NRAI in Dementia

NCT03761381
View directory record Official record
Conditions
Alzheimer Disease, Dementia, Mild Cognitive Impairment
Interventions
Optical Coherence Tomography Angiography (OCTA) Imaging, Noninvasive Retinal Amyloid Imaging (NRAI)
Device
Lead sponsor
Oregon Health and Science University
Other
Eligibility
55 Years and older
Enrollment
20 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2018 – 2027
U.S. locations
1
States / cities
Portland, Oregon
Source: ClinicalTrials.gov public record
Updated Sep 12, 2025 · Synced Nov 1, 2026, 12:22 AM EDT
Completed Phase 1 Interventional Accepts healthy volunteers Results available

Behavioral and Neuroimaging Changes After Cognitive Rehab in Traumatic Brain Injuries (TBI) and Mild Cognitive Impairment (MCI)

NCT00714571
View directory record Official record
Conditions
Mild Cognitive Impairment, Alzheimer's Disease, Traumatic Brain Injury
Interventions
Mnemonic strategy training (MST), Repeated exposure (XP), Subtracting Cues training
Behavioral
Lead sponsor
VA Office of Research and Development
Federal
Eligibility
18 Years to 88 Years
Enrollment
82 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2008 – 2014
U.S. locations
1
States / cities
Decatur, Georgia
Source: ClinicalTrials.gov public record
Updated Jan 4, 2017 · Synced Nov 1, 2026, 12:22 AM EDT
Recruiting Not applicable Interventional

Feasibility/Acceptability of Attentional-Control Training in Survivors

NCT05528939
View directory record Official record
Conditions
Pediatric Cancer, Pediatric ALL, Pediatric Brain Tumor, Attention Difficulties, Cognitive Deficit in Attention
Interventions
EndeavorRx, Control video game
Device · Other
Lead sponsor
Children's National Research Institute
Other
Eligibility
8 Years to 16 Years
Enrollment
50 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2023 – 2025
U.S. locations
1
States / cities
Washington D.C., District of Columbia
Source: ClinicalTrials.gov public record
Updated Jan 10, 2025 · Synced Nov 1, 2026, 12:22 AM EDT
Terminated Not applicable Interventional Results available

Assessment of Medication Optimization in Rural Kentucky Appalachian Patients With Mild Cognitive Impairment or Dementia

NCT05078437
View directory record Official record
Conditions
Dementia, Mild Cognitive Impairment
Interventions
Medication therapy management
Behavioral
Lead sponsor
Daniela Moga
Other
Eligibility
60 Years and older
Enrollment
16 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2021 – 2023
U.S. locations
1
States / cities
Lexington, Kentucky
Source: ClinicalTrials.gov public record
Updated Aug 23, 2024 · Synced Nov 1, 2026, 12:22 AM EDT
Completed No phase listed Observational

Cholinesterase Activity and DeliriUm During Critical Illness Study

NCT03098472
View directory record Official record
Conditions
Delirium, Cognitive Impairment
Interventions
Not listed
Lead sponsor
Vanderbilt University Medical Center
Other
Eligibility
18 Years and older
Enrollment
279 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2017 – 2021
U.S. locations
1
States / cities
Nashville, Tennessee
Source: ClinicalTrials.gov public record
Updated Mar 11, 2022 · Synced Nov 1, 2026, 12:22 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 9, 2012 · Synced Nov 1, 2026, 12:22 AM EDT
Completed Not applicable Interventional

Urolithin A Supplementation in Middle-aged Adults With Obesity

NCT05921266
View directory record Official record
Conditions
Obesity, Vascular Dementia, Cognitive Impairment
Interventions
Urolithin A, Placebo
Dietary Supplement · Other
Lead sponsor
University of Oklahoma
Other
Eligibility
40 Years to 64 Years
Enrollment
50 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2023 – 2025
U.S. locations
1
States / cities
Oklahoma City, Oklahoma
Source: ClinicalTrials.gov public record
Updated Jun 26, 2025 · Synced Nov 1, 2026, 12:22 AM EDT
Completed No phase listed Observational Accepts healthy volunteers

Atlas of Retinal Imaging in Alzheimer's Study

NCT03862222
View directory record Official record
Conditions
Alzheimer Disease, Mild Cognitive Impairment, Mild Dementia, Aging, Cognitive Change
Interventions
Retinal Imaging, Pupillometry, Contrast Sensitivity, Neuropsychological Evaluation, APOE genotyping, blood draw, Gait Assessment, Actigraphy
Other · Diagnostic Test · Genetic
Lead sponsor
University of Rhode Island
Other
Eligibility
55 Years to 80 Years
Enrollment
165 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2019 – 2025
U.S. locations
4
States / cities
Clearwater, Florida • St. Petersburg, Florida • Kingston, Rhode Island + 1 more
Source: ClinicalTrials.gov public record
Updated Jun 5, 2025 · Synced Nov 1, 2026, 12:22 AM EDT
Recruiting Phase 2 Interventional

Repurposing Riluzole for Cancer-Related Cognitive Impairment: A Pilot Trial

NCT06580002
View directory record Official record
Conditions
Breast Cancer, Sarcoma, Gastric Cancer, Lung Cancer, Head and Neck Cancer, Colorectal Cancer, Ovarian Cancer, Liver Cancer, Genitourinary Cancer, Gynecologic Cancer, Urinary Bladder Cancer, Leukemia, Lymphoid Leukemia, Myeloma Multiple, Prostate Cancer, Pancreas Cancer, Non-hodgkin Lymphoma, Hodgkin Lymphoma, Brain Cancer, Melanoma, Mycosis Fungoides, Kidney Cancer
Interventions
Riluzole, Placebo
Drug
Lead sponsor
University of California, Irvine
Other
Eligibility
18 Years and older
Enrollment
75 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2024 – 2027
U.S. locations
1
States / cities
Orange, California
Source: ClinicalTrials.gov public record
Updated Jul 14, 2026 · Synced Nov 1, 2026, 12:22 AM EDT
Completed No phase listed Observational

New IDEAS: Imaging Dementia-Evidence for Amyloid Scanning Study

NCT04426539
View directory record Official record
Conditions
Alzheimer's Disease, Dementia, Mild Cognitive Impairment
Interventions
Not listed
Lead sponsor
American College of Radiology
Other
Eligibility
18 Years and older
Enrollment
6,061 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2020 – 2024
U.S. locations
1
States / cities
Philadelphia, Pennsylvania
Source: ClinicalTrials.gov public record
Updated Feb 2, 2026 · Synced Nov 1, 2026, 12:22 AM EDT
Completed No phase listed Observational

Decrease in Sense of Smell and Associated Cognitive Decline in Parkinson's Disease

NCT01572142
View directory record Official record
Conditions
Parkinson's Disease
Interventions
Not listed
Lead sponsor
University of Michigan
Other
Eligibility
50 Years and older
Enrollment
74 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2010 – 2016
U.S. locations
1
States / cities
Ann Arbor, Michigan
Source: ClinicalTrials.gov public record
Updated Sep 29, 2017 · Synced Nov 1, 2026, 12:22 AM EDT
Completed Not applicable Interventional Results available

Happy Older Latinos Are Active - Cognitive Decline

NCT04791709
View directory record Official record
Conditions
Cognitive Decline
Interventions
Happy Older Latinos are Active (HOLA)
Behavioral
Lead sponsor
University of Miami
Other
Eligibility
50 Years and older
Enrollment
30 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2022 – 2025
U.S. locations
1
States / cities
Miami, Florida
Source: ClinicalTrials.gov public record
Updated Oct 20, 2025 · Synced Nov 1, 2026, 12:22 AM EDT
Completed Phase 2 Interventional Results available

Ramelteon in the Prevention of Post-operative Delirium

NCT02324153
View directory record Official record
Conditions
Delirium, Delirium, Dementia, Amnestic, Cognitive Disorders, Delayed Emergence From Anesthesia, Cognitive Disorders
Interventions
Ramelteon, Microcrystalline Cellulose, Riboflavin 100 mg
Drug
Lead sponsor
Johns Hopkins University
Other
Eligibility
65 Years and older
Enrollment
80 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2017 – 2019
U.S. locations
1
States / cities
Baltimore, Maryland
Source: ClinicalTrials.gov public record
Updated Jun 30, 2020 · Synced Nov 1, 2026, 12:22 AM EDT
Recruiting No phase listed Observational Accepts healthy volunteers

Wake Forest Alzheimer's Disease Clinical Core

NCT03140865
View directory record Official record
Conditions
Alzheimer's Disease, Mild Cognitive Impairment, Prediabetic State
Interventions
Not listed
Lead sponsor
Wake Forest University Health Sciences
Other
Eligibility
55 Years and older
Enrollment
850 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2014 – 2031
U.S. locations
1
States / cities
Winston-Salem, North Carolina
Source: ClinicalTrials.gov public record
Updated Oct 6, 2026 · Synced Nov 1, 2026, 12:22 AM EDT
Completed Phase 2 Interventional Accepts healthy volunteers Results available

Practice Effects and Amyloid Imaging Using 18F-PIB or Flutemetamol PET and FDG-PET

NCT01202994
View directory record Official record
Conditions
Alzheimer's Disease
Interventions
18F-Flutemetamol
Drug
Lead sponsor
University of Utah
Other
Eligibility
65 Years and older
Enrollment
27 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2011 – 2020
U.S. locations
1
States / cities
Salt Lake City, Utah
Source: ClinicalTrials.gov public record
Updated May 9, 2023 · Synced Nov 1, 2026, 12:22 AM EDT