Medical Information Only. Consult your healthcare provider before considering clinical trial enrollment.
Normal Physiology: early-phase trial registry
20 of 26 indexed Normal Physiology trials are currently recruiting, with more weight in Phase 1-2.
Corpus placement: #627 of 28,707 conditions by registered trial count.
26 US clinical trials · 20 currently recruiting · #627 of 28,707 conditions by registered trial count
Normal Physiology: 26 US clinical trials tracked, 20 recruiting.
Normal Physiology is the subject of 26 registered US clinical trials on ClinicalTrials.gov, 20 of them currently open to new participants. 0 are in Phase 3-4 (later-stage) and 2 in Phase 1-2 (earlier-stage). The most active sponsor is National Institute of Neurological Disorders and Stroke (NINDS), running 7 of these trials.
Enrollment posture brief
Registry condition normal-physiology
OPEN 20 | RECR 77% | LATE 0 | EARLY 2 | RANK #627 | SPON 7
Volume-matched condition peers
Nearest open-share peer: Firearm Injury (77% recruiting · 13 trials)
Normal Physiology lists 20 open slots (77% of 26 indexed trials). Peers are matched on registered volume, not therapeutic-area browse lists. How peer matching works →
Key findings
What ClinicalTrials.gov does not surface for Normal Physiology on its own pages , computed from the registry mirror as of 2026-08-08. Each line carries its own denominator so it can be quoted as it stands.
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Normal Physiology is recruiting above its size-band peers.
20 of 26 indexed trials (76.9%) are open to enrollment, against a 39.7% average across 762 conditions with 20-99 trials. The peer set uses the same ClinicalTrials.gov-derived counts as this page.
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One sponsor concentrates Normal Physiology research.
National Institute of Neurological Disorders and Stroke (NINDS) accounts for 7 of 26 trials (26.9%). 11 distinct sponsors appear on at least one study for this condition label.
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Typical Normal Physiology enrolment sits around 200 participants.
Median target enrolment is 200 among the 26 trials that report a genuine target (sentinel values excluded). 7 of those (26.9%) plan for fewer than 100 participants.
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Normal Physiology splits between interventional and observational designs.
12 interventional and 14 observational studies make up this index (46.2% interventional). Study type is sponsor-reported on ClinicalTrials.gov.
Open and recent trials
26 total, page 1 of 1
Perception, Sensation, Cognition and Action in Humans
National Eye Institute (NEI)
NCT03407066
Clinical and Scientific Assessment of Pain and Painful Disorders
National Center for Complementary and Integrative Health (NCCIH)
NCT02707029
Functional Magnetic Resonance Imaging Sleep Study With Auditory Stimuli
National Institute of Neurological Disorders and Stroke (NINDS)
NCT02629107
A Natural History Study of Metabolic Sizing in Health and Disease
National Institute of Diabetes and Digestive and Kidney Diseases (NIDDK)
NCT05398783
NIEHS Repository of Stored Biological Samples for Future Use
National Institute of Environmental Health Sciences (NIEHS)
NCT05666739
Development of 3T Magnetic Resonance Research Methods for NIA Studies
National Institute on Aging (NIA)
NCT01324206
Sociocultural & Biobehavioral Influences on Pain Expression and Assessment
National Center for Complementary and Integrative Health (NCCIH)
NCT03258580
Defining Neurobiological Links Between Substance Use and Mental Illness
National Institute on Drug Abuse (NIDA)
NCT05538910
Developing Transcranial Neuromodulation Protocols for Learning and Decision-Making
National Institute on Drug Abuse (NIDA)
NCT06561828
Development and Validation of Learning and Decision-Making Tasks
National Institute on Drug Abuse (NIDA)
NCT05707806
Neural and Psychological Mechanisms of Pain Perception
National Center for Complementary and Integrative Health (NCCIH)
NCT02446262
MRS Measurement of Glutamate and GABA Metabolism in Brain
National Institute of Mental Health (NIMH)
NCT00109174
Assessing and Improving Quantitative Magnetic Resonance Imaging Metrics in Human Subjects
National Institute of Neurological Disorders and Stroke (NINDS)
NCT05604534
Development Of Neuroimaging Methods To Assess The Neurobiology Of Addiction
National Institute on Alcohol Abuse and Alcoholism (NIAAA)
NCT02535702
Investigating the Impact of Obesity on Pubertal Development in Girls
National Institute of Environmental Health Sciences (NIEHS)
NCT02583646
Investigational Use of Neuromuscular Ultrasound
National Institute of Neurological Disorders and Stroke (NINDS)
NCT05237973
The Effects of Increasing Caloric Intake on Diet-Induced Thermogenesis and 24h Energy Expenditure
National Institute of Diabetes and Digestive and Kidney Diseases (NIDDK)
NCT05545306
Influence of Brain Oscillation-Dependent TMS on Motor Function
National Institute of Neurological Disorders and Stroke (NINDS)
NCT03288220
Characterization of an Optically Pumped Magnetometer (OPM) Magnetoencephalography (MEG) Array
National Institute of Mental Health (NIMH)
NCT04950309
Impact of Sex and Age on Non-visual Light Input That Affects Sleep and Circadian Rhythms
Massachusetts General Hospital
NCT05829044
Volunteer Screening for Vaccine and Antivirals Clinical Trials
National Institute of Allergy and Infectious Diseases (NIAID)
NCT01593709
Task-dependent Effects of TMS on the Neural Biomarkers of Episodic Memory
National Institute of Neurological Disorders and Stroke (NINDS)
NCT04694131
Layer-specific Contribution to Consolidation of Skill Learning in the Primary Motor Cortex
National Institute of Neurological Disorders and Stroke (NINDS)
NCT04431011
Study of Volition: Behavioral Analysis and Clinical Neurophysiological Analysis
National Institute of Neurological Disorders and Stroke (NINDS)
NCT04344470
Dopaminergic Modulation of Brain Activation Using Simultaneous PET/Pharmacological MRI
National Institute on Alcohol Abuse and Alcoholism (NIAAA)
NCT03326245
Studying Cell Immune Responses to a Live Flu Vaccine in Healthy Adults
National Institute of Allergy and Infectious Diseases (NIAID)
NCT01730144
Phase Distribution
| Phase | Trial count |
|---|---|
| Phase 1 | 2 |
Top Sponsors
Named interventions
Most-linked intervention names on Normal Physiology records (sponsor-reported on ClinicalTrials.gov). Counts are trial links, not unique products.
US sites by state
Facility locations filed on Normal Physiology trials. A trial with sites in several states counts in each.
Source: ClinicalTrials.gov, National Library of Medicine. Data is informational only.
Related
What to do with this Normal Physiology page
26 registered trials, 20 currently recruiting, is a starting point for a conversation, not a diagnosis or a recommendation.
- 20 Normal Physiology trials are currently recruiting, check eligibility criteria before contacting a site. Browse recruiting trials
- National Institute of Neurological Disorders and Stroke (NINDS) sponsors the most Normal Physiology trials on record, review their full trial history before evaluating a specific study. See National Institute of Neurological Disorders and Stroke (NINDS)'s trials
- Bring the specific trial ID (NCT number) to your own doctor before enrolling, this page is a directory, not medical guidance. Read the trial-finding guide
Trial and recruiting counts reflect ClinicalTrials.gov registry status as of the data vintage above; individual trial eligibility and enrollment status can change.
Every figure on PlainTrial is rendered directly from the ClinicalTrials.gov registry, no number is typed in by an editor. This Normal Physiology condition card totals 26 registered trials; most-linked intervention EMG; top US site state Maryland. See our editorial standards & corrections policy, the methodology behind these numbers, the data changelog, or report a data error.