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Showing 25–48 of 24 matching trials from the live ClinicalTrials.gov search.
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Filters: Condition: Cognitive/Functional Effects Clear all
Terminated Phase 3 Interventional

Methylphenidate to Improve Quality of Life in Patients Undergoing Radiation Therapy for Brain Tumors

NCT00031798
View directory record Official record
Conditions
Brain and Central Nervous System Tumors, Cognitive/Functional Effects, Depression, Fatigue, Quality of Life
Interventions
methylphenidate hydrochloride, quality-of-life assessment, radiation therapy
Drug · Procedure · Radiation
Lead sponsor
Wake Forest University Health Sciences
Other
Eligibility
18 Years to 120 Years
Healthy volunteers
Healthy volunteers not accepted
Timeline
2002 – 2006
U.S. locations
7
States / cities
Phoenix, Arizona • Decatur, Illinois • New Orleans, Louisiana + 4 more
Source: ClinicalTrials.gov public record
Updated Sep 8, 2021 · Synced Sep 22, 2026, 10:06 AM EDT
Completed Not applicable Interventional Accepts healthy volunteers

Effects of Breakfast on Cognitive Processes in Children

NCT01063894
View directory record Official record
Conditions
Cognitive Function
Interventions
breakfast cereal, water
Other
Lead sponsor
Kellogg Company
Industry
Eligibility
8 Years to 12 Years
Enrollment
291 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2009 – 2010
U.S. locations
1
States / cities
Addison, Illinois
Source: ClinicalTrials.gov public record
Updated Feb 19, 2020 · Synced Sep 22, 2026, 10:06 AM EDT
Completed Not applicable Interventional Accepts healthy volunteers

Atypical Antipsychotic Treatment Effect On Brain Function In Schizophrenia Measured By FMRI

NCT01234454
View directory record Official record
Conditions
Schizophrenia
Interventions
Risperidone, Olanzapine
Drug
Lead sponsor
University of North Carolina, Chapel Hill
Other
Eligibility
18 Years to 60 Years
Enrollment
34 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2002 – 2007
U.S. locations
1
States / cities
Chapel Hill, North Carolina
Source: ClinicalTrials.gov public record
Updated Apr 2, 2015 · Synced Sep 22, 2026, 10:06 AM EDT
Not listed No phase listed Observational Accepts healthy volunteers

Effect of Sleep Deprivation on Cognitive Function Among Cardiology Fellows

NCT05513339
View directory record Official record
Conditions
Wellness, Burnout, Sleep Deprivation, Executive Function
Interventions
WHOOP strap 4.0
Device
Lead sponsor
Thomas Jefferson University
Other
Eligibility
18 Years to 99 Years
Enrollment
21 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2022 – 2023
U.S. locations
1
States / cities
Philadelphia, Pennsylvania
Source: ClinicalTrials.gov public record
Updated Aug 23, 2022 · Synced Sep 22, 2026, 10:06 AM EDT
Completed Not applicable Interventional Accepts healthy volunteers Results available

Long Sleep Duration and Vascular Function

NCT04679051
View directory record Official record
Conditions
Sleep
Interventions
Sleep duration
Behavioral
Lead sponsor
Texas Tech University
Other
Eligibility
40 Years to 79 Years
Enrollment
23 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2019 – 2021
U.S. locations
1
States / cities
Lubbock, Texas
Source: ClinicalTrials.gov public record
Updated Jan 12, 2023 · Synced Sep 22, 2026, 10:06 AM EDT
Completed Not applicable Interventional Accepts healthy volunteers

Different Types of Fruits on Metabolic Function and Cognitive Performance

NCT02736331
View directory record Official record
Conditions
Healthy
Interventions
Treatment 1, Treatment 2
Dietary Supplement
Lead sponsor
Clinical Nutrition Research Center, Illinois Institute of Technology
Industry
Eligibility
40 Years to 65 Years
Enrollment
40 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2016 – 2020
U.S. locations
1
States / cities
Chicago, Illinois
Source: ClinicalTrials.gov public record
Updated Jul 26, 2021 · Synced Sep 22, 2026, 10:06 AM EDT
Completed No phase listed Observational

Genetic Susceptibility to Radiation-Induced Skin Reactions in Racial/Ethnic Groups of Patients With Breast Cancer

NCT01407770
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 Sep 22, 2026, 10:06 AM EDT
Completed Not applicable Interventional Accepts healthy volunteers

Acute Effect of Motor-Cognitive Training

NCT06017154
View directory record Official record
Conditions
Injury;Sports
Interventions
Motor-Cognitive Training Program
Other
Lead sponsor
Ke'La H Porter
Other
Eligibility
18 Years to 25 Years · Female only
Enrollment
21 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2023 – 2024
U.S. locations
1
States / cities
Lexington, Kentucky
Source: ClinicalTrials.gov public record
Updated Apr 14, 2024 · Synced Sep 22, 2026, 10:06 AM EDT
Terminated No phase listed Observational

Older Patients With Newly Diagnosed Breast Cancer or Colon Cancer

NCT00740961
View directory record Official record
Conditions
Breast Cancer, Cognitive/Functional Effects, Colorectal Cancer, Psychosocial Effects of Cancer and Its Treatment
Interventions
compliance monitoring, systemic chemotherapy, medical chart review, study of socioeconomic and demographic variables, survey administration, cognitive assessment, psychosocial assessment and care
Behavioral · Drug · Other + 1 more
Lead sponsor
Case Comprehensive Cancer Center
Other
Eligibility
65 Years and older
Enrollment
63 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2008 – 2011
U.S. locations
5
States / cities
Cleveland, Ohio • Mentor, Ohio • Orange, Ohio + 2 more
Source: ClinicalTrials.gov public record
Updated Jul 26, 2020 · Synced Sep 22, 2026, 10:06 AM EDT
Completed Not applicable Interventional Accepts healthy volunteers

Short-Term Rhodiola Rosea for Anaerobic Performance and Cognitive Function in Resistance-Trained Adults

NCT07225413
View directory record Official record
Conditions
Healthy Volunteers
Interventions
Rhodiola rosea (low dose), Rhodiola rosea (high dose), Placebo capsules
Dietary Supplement
Lead sponsor
Jacksonville State University
Other
Eligibility
18 Weeks to 40 Weeks
Enrollment
27 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2022
U.S. locations
1
States / cities
Jacksonville, Alabama
Source: ClinicalTrials.gov public record
Updated Nov 5, 2025 · Synced Sep 22, 2026, 10:06 AM EDT
Completed No phase listed Observational Accepts healthy volunteers

Effect of Sedation on Cognitive Performance in the Elderly

NCT03089866
View directory record Official record
Conditions
Postoperative Cognitive Dysfunction
Interventions
Midazolam (0.02mg/kg)
Drug
Lead sponsor
University of Alabama at Birmingham
Other
Eligibility
55 Years and older
Enrollment
20 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2015 – 2020
U.S. locations
1
States / cities
Birmingham, Alabama
Source: ClinicalTrials.gov public record
Updated Jul 10, 2025 · Synced Sep 22, 2026, 10:06 AM EDT
Completed Not applicable Interventional

Effects of Yoga on Cognitive and Immune Function in Colorectal Cancer

NCT02564835
View directory record Official record
Conditions
Colorectal Neoplasms
Interventions
Yoga, Physical Activity
Other
Lead sponsor
University of Michigan
Other
Eligibility
21 Years and older
Enrollment
27 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2015 – 2017
U.S. locations
1
States / cities
Ann Arbor, Michigan
Source: ClinicalTrials.gov public record
Updated Dec 18, 2018 · Synced Sep 22, 2026, 10:06 AM EDT
Not yet recruiting Not applicable Interventional Accepts healthy volunteers

Goji Berry and Vasomotor Symptoms Pilot Study

NCT07660315
View directory record Official record
Conditions
Vasomotor Symptoms
Interventions
Goji Berry Juice Powder, Goji Berry Powder
Other
Lead sponsor
University of California, Davis
Other
Eligibility
40 Years to 65 Years · Female only
Enrollment
6 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2026 – 2027
U.S. locations
1
States / cities
Davis, California
Source: ClinicalTrials.gov public record
Updated Aug 17, 2026 · Synced Sep 22, 2026, 10:06 AM EDT
Completed Not applicable Interventional Accepts healthy volunteers Results available

Effects of Strengthening Exercise on the Brain for Early Dementia and Normative Older Adults

NCT01264614
View directory record Official record
Conditions
Cognitive Decline, Dementia, Alzheimer's Disease, Mild Cognitive Impairment
Interventions
Strengthening exercise
Behavioral
Lead sponsor
Union College, New York
Other
Eligibility
55 Years and older
Enrollment
22 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2010 – 2011
U.S. locations
1
States / cities
Albany, New York
Source: ClinicalTrials.gov public record
Updated Mar 10, 2015 · Synced Sep 22, 2026, 10:06 AM EDT
Not listed Not applicable Interventional Accepts healthy volunteers

The Effect of Transcranial Direct Current Stimulation (tDCS) on Motor and Cognitive Functions in Idiopathic Fallers

NCT02954328
View directory record Official record
Conditions
Elderly Idiopathic Fallers
Interventions
tDCS
Device
Lead sponsor
Tel-Aviv Sourasky Medical Center
Government
Eligibility
65 Years to 85 Years
Enrollment
40 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2016 – 2017
U.S. locations
1
States / cities
Roslindale, Massachusetts
Source: ClinicalTrials.gov public record
Updated Apr 20, 2017 · Synced Sep 22, 2026, 10:06 AM EDT
Completed No phase listed Observational

Study of Symptoms Caused by Cancer and Cancer Therapy in Patients With Invasive Breast, Lung, Prostate, or Colorectal Cancer

NCT00303914
View directory record Official record
Conditions
Breast Cancer, Cognitive/Functional Effects, Colorectal Cancer, Lung Cancer, Pain, Prostate Cancer, Psychosocial Effects of Cancer and Its Treatment
Interventions
assessment of therapy complications, cognitive assessment, psychosocial assessment and care
Procedure
Lead sponsor
Eastern Cooperative Oncology Group
Network
Eligibility
18 Years to 120 Years
Enrollment
2,310 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2006 – 2013
U.S. locations
32
States / cities
Chicago, Illinois • Evanston, Illinois • Elkhart, Indiana + 19 more
Source: ClinicalTrials.gov public record
Updated Jun 17, 2023 · Synced Sep 22, 2026, 10:06 AM EDT
Completed Not applicable Interventional Accepts healthy volunteers

The Acute Effects of Onnit Alpha Brain on Cognition and Mood States

NCT07495592
View directory record Official record
Conditions
Cognitive, Mood and Cognitive Performance, Sleep Deprivation, Executive Function (Cognition), Fatigue
Interventions
Alpha Brain proprietary cognitive dietary supplement, Alpha Brain 2.0 proprietary cognitive dietary supplement, Controlled Placebo
Dietary Supplement
Lead sponsor
Applied Science & Performance Institute
Industry
Eligibility
20 Years to 59 Years
Enrollment
32 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2026
U.S. locations
1
States / cities
Tampa, Florida
Source: ClinicalTrials.gov public record
Updated Jul 7, 2026 · Synced Sep 22, 2026, 10:06 AM EDT
Completed No phase listed Observational

Cognitive Changes in Adult Cancer Survivors

NCT01569932
View directory record Official record
Conditions
Effects of Chemotherapy, Cognitive Impairment
Interventions
Not listed
Lead sponsor
Washington University School of Medicine
Other
Eligibility
40 Years and older
Enrollment
13 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2011 – 2013
U.S. locations
1
States / cities
St Louis, Missouri
Source: ClinicalTrials.gov public record
Updated Feb 25, 2013 · Synced Sep 22, 2026, 10:06 AM EDT
Recruiting Not applicable Interventional

Effects of Accelerated rTMS On Motor and Cognitive Function in Parkinson's Disease

NCT07554833
View directory record Official record
Conditions
PARKINSON DISEASE (Disorder), Parkinson s Disease
Interventions
TMS
Device
Lead sponsor
San Francisco Neurology and Sleep Center
Other
Eligibility
50 Years to 90 Years
Enrollment
40 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2026 – 2027
U.S. locations
1
States / cities
San Francisco, California
Source: ClinicalTrials.gov public record
Updated Jun 15, 2026 · Synced Sep 22, 2026, 10:06 AM EDT
Completed No phase listed Observational

Neurocognitive Functioning in Patients With Newly Diagnosed Upper Aerodigestive Tract Cancer Receiving Treatment at Henry-Joyce Cancer Clinic

NCT00533884
View directory record Official record
Conditions
Neurocognitive Impairment, Delirium, Esophageal Cancer, Head and Neck Cancer, Lung Cancer
Interventions
Assessment of therapy complications, Neurocognitive assessment, Quality-of-life assessment
Other
Lead sponsor
Vanderbilt University Medical Center
Other
Eligibility
21 Years and older
Enrollment
86 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2007 – 2013
U.S. locations
4
States / cities
Nashville, Tennessee
Source: ClinicalTrials.gov public record
Updated Apr 6, 2017 · Synced Sep 22, 2026, 10:06 AM EDT
Completed Phase 2 Interventional Results available

Endothelial Facilitation in Alzheimer's Disease

NCT01439555
View directory record Official record
Conditions
Alzheimer's Disease
Interventions
Simvastatin, L-Arginine, Tetrahydrobiopterin
Drug
Lead sponsor
University of Massachusetts, Worcester
Other
Eligibility
55 Years to 85 Years
Enrollment
11 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2011 – 2017
U.S. locations
1
States / cities
Worcester, Massachusetts
Source: ClinicalTrials.gov public record
Updated Jul 29, 2019 · Synced Sep 22, 2026, 10:06 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 Sep 22, 2026, 10:06 AM EDT
Completed Phase 4 Interventional Accepts healthy volunteers

Soy Isoflavone Tablets: Effects on Sleep, Quality of Life, Symptoms and Cognitive Function in Menopausal Women

NCT01401946
View directory record Official record
Conditions
Hot Flashes
Interventions
soy isoflavones, Placebo
Drug
Lead sponsor
Brigham and Women's Hospital
Other
Eligibility
Female only
Enrollment
88 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2000 – 2001
U.S. locations
1
States / cities
Boston, Massachusetts
Source: ClinicalTrials.gov public record
Updated Jul 25, 2011 · Synced Sep 22, 2026, 10:06 AM EDT
Completed Phase 4 Interventional Results available

Effect of Extended-release Oxymorphone Taken With or Without Food on Cognitive Functioning

NCT00930943
View directory record Official record
Conditions
Chronic Pain
Interventions
Oxymorphone ER
Drug
Lead sponsor
MedVadis Research Corporation
Industry
Eligibility
18 Years to 65 Years
Enrollment
30 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2009
U.S. locations
1
States / cities
Wellesley Hills, Massachusetts
Source: ClinicalTrials.gov public record
Updated May 8, 2023 · Synced Sep 22, 2026, 10:06 AM EDT