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New study to uncover hidden brain effects of Low-Level blasts in elite troops

NCT ID NCT07606651

Knowledge-focused Sponsor: Uniformed Services University of the Health Sciences Source: ClinicalTrials.gov ↗

What the study statuses mean

This study's is highlighted.

Recruitment status, easiest to join first

Recruiting now
This trial is taking on new participants right now.
Not yet recruiting This study
Registered, but not yet taking participants.
By invitation only
Not open to general applications. Only people the study team invites can take part.
Paused
Paused for now. It may or may not start again.
Ongoing
Running, but no longer taking on new participants.
Completed
The trial has finished. Results may not be published yet.
Stopped early
Stopped early, before it reached the end. That can be for many reasons, including safety.
Cancelled
Cancelled before anyone took part.

Expanded access (not trials)

Expanded access
Not a trial. This treatment can be requested outside a study, case by case, for people who qualify.
Expanded access (paused)
Not a trial. The treatment can normally be requested outside a study, but is unavailable right now.
Expanded access (ended)
Not a trial. The treatment could once be requested outside a study, but no longer can.
Approved
The treatment has been approved, so it is available normally rather than through this programme.

When the status isn't known

Details not published
The full record has not been published yet, so there is little to show here.
Status unknown
This status has not been confirmed recently, so it may be out of date.

First seen Jun 27, 2026 · Last updated Jun 27, 2026

Summary

This study looks at how repeated low-level blasts (like from firing weapons) may affect the brains of U.S. Special Operations Forces personnel. Researchers will use advanced brain scans, questionnaires, and blood tests to find links between blast exposure and symptoms. The goal is to better understand these effects, not to test a treatment.

This is an AI summary of the original study and may miss details. Read our disclaimer.

Study facts

What this study's own registry entry says, in plain language.

Participants

About 250 people

The number the study aims to enrol. It can still change while the study runs.

Expected to start

May 2026

An estimate. Start dates often move.

Expected to finish

Aug 2030

An estimate. End dates often move.

Lead sponsor

A government agency

The lead sponsor is a US federal agency other than the NIH.

Who can take part

This study's own entry requirements. Only the study team can say for certain whether you qualify.

Who is studied

The target population is 250 SOF personnel, particularly those who are regularly exposed to occupational low-level blast exposure. Approximately 10% of the sample will be recruited as a control group of low/no exposure personnel.

Ages

18 to 50 years

Sex

Anyone

Healthy volunteers

Accepted

You do not need to have the condition being studied to take part.

Show the full entry requirements

Copied word for word from the study's registry entry, so the wording is the study team's rather than ours.

Inclusion Criteria: * Active duty * U.S. SOF personnel * 18-50 years old Exclusion Criteria: * Subjects will be excluded only if their participation will significantly interfere with validity of data collection or safety during the study (e.g., they have conditions that might result in harm or injury during research procedures). * Example: pregnancy (balance considerations) * Example: being unable to undergo MRI testing (i.e., they have non-MRI compatible devices, imbedded metal fragments such as shrapnel, and/or severe claustrophobia; these MRI contraindications will be screened using an MRI Safety Questionnaire)

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Conditions

The condition(s) this trial relates to.

Brain Concussion Brain Injuries, Traumatic

As listed by the trial registrant

The condition terms exactly as the trial's registrant entered them.

Low-level blast exposure

How to take part

Only the study team decides who joins. These are the ways to reach them.

  1. The places running it

    3 sites. The list below names each one and where it is.

  2. The official record

    ClinicalTrials.gov lists the study team's own contact details, including names and phone numbers. We don't republish those.

    Open the record ↗

  3. A doctor treating you

    A doctor who knows your case can contact a study site on your behalf, and can tell you whether this study is worth pursuing at all.

Contacts and locations

Locations

  • Fort Bragg

    Fort Bragg, North Carolina, 28310, United States

  • Walter Reed National Military Medical Center

    Bethesda, Maryland, 20889, United States

  • Wilford Hall Ambulatory Surgical Center

    San Antonio, Texas, 78236, United States