NCT07601841 · Oregon Health and Science University
Light Therapy to Improve Sleep in TBI: Sleep-active Biomarkers and Glymphatic Function
(GLIMPSE-LION)
What this study is about
This is a clinical trial designed to examine how improved sleep through morning bright light therapy is improving downstream key physiologic processes related to brain health, i.e., mitochondrial function, systemic inflammation, and glymphatic function. All proposed methodology is already approved in other IRB applications.
View original scientific description
This is a clinical trial designed to examine how improved sleep through morning bright light therapy is improving downstream key physiologic processes related to brain health, i.e., mitochondrial function, systemic inflammation, and glymphatic function. All proposed methodology is already approved in other IRB applications.
Who can participate
This study lists these criteria on ClinicalTrials.gov. A study coordinator reviews eligibility during screening — this page does not determine whether you qualify.
Inclusion criteria
- All subjects must:
- Male and female; any race; 18-89 years of age.
- Be English speaking.\
- Be accessible via phone.
- Be non-decisionally impaired. Determined by assessing the subject's ability to verbalize their understanding of the protocol back to us during the informed consent process.
- Not have a history of macular degeneration.
- Not have a history of bipolar disorder.
- Not be currently using a lightbox or a negative ion generator.
- Not be a shift worker.
- Have a documented history of TBI via the Head Trauma Events Characteristics (HTEC) or OHIO conducted in accordance with VA/DoD Clinical Practice Guidelines.88
- Present with self-reported sleep-wake disturbances.
- Remain clinically stable for current pharmacologic treatment related to depression/anxiety, sleep, and pain.
- MRI specific compatibility requirements:
- No pacemaker, wires, defribrillator or implanted heart valves
- No history of head surgery requiring aneurysm clips
- No history of other orthopedic or general surgery requiring the implantation of ferrous pins, joints, electric devices/pumps, or other foreign metal objects
- History of eye exposure to metal (unprotected welding/metalworking/shrapnel) is allowable provided the participant screens negative for metal in the eyes on an orbital x-ray or is able to provide clinical documentation of having screened negative.
- No history of non-removable hearing aids, middle/inner ear prosthesis, or dentures
- No history of claustrophobia; if unsure participant will be pre-screened in our mock scanner
- Not currently pregnant, breastfeeding, or have an implanted IUD. Participants who are unsure of their pregnancy status will be administered an hCG urine pregnancy test the day of their scan.
- Able to lay flat on their back comfortably without a thick pillow for an extended period of time.
- Shoulder width does not exceed width for safety fitting in the MRI bore.
- This study is limited to English-speaking participants because all assessments, interventions, and consent materials are currently validated and approved only in English. Expanding to other languages would require translation and psychometric validation, which are beyond the scope and budget of this study. This limitation is acknowledged and will be addressed in future research as resources permit. Finally, the study team is only fluent in English, making it infeasible to accurately consent or interact with non-English speakers without interpreting services which again is outside of the scope of this projects budget and timeline. Proceeding without formal translation services would risk miscommunication in informed consent, data collection, or participant support and thus protects participants informed consent and participant understanding.
Where
- Portland, Oregon
Frequently asked questions
What is a clinical trial?
A clinical trial is a research study that tests new medical treatments, drugs, devices, or procedures to determine their safety and effectiveness. Trials are carefully designed and monitored to protect participants while advancing medical knowledge.
Is it safe to participate?
Clinical trials follow strict safety guidelines and ethical standards. Trials must be reviewed and approved, and participants are closely monitored by medical professionals throughout the study. You can withdraw at any time if you choose.
Will I be compensated?
Many clinical trials offer compensation for your time, travel expenses, and inconvenience. The specific compensation varies by study and will be discussed during the screening process. All study-related medical care is typically provided at no cost to participants.
Will I receive a placebo instead of treatment?
When effective treatment exists, participants typically receive either the standard treatment plus the study intervention, or the standard treatment plus placebo. You would not be denied effective care. Placebos are primarily used when no proven treatment is available, or in addition to standard care. Your trial consent form will clearly explain what treatments you may receive.
Can I leave a trial if I change my mind?
Absolutely. Participation in clinical trials is completely voluntary. You have the right to withdraw from the study at any time, for any reason, without penalty or loss of benefits to which you are otherwise entitled.
How long does a clinical trial last?
Trial duration varies widely depending on the study design and purpose. Some trials last just a few weeks, while others may continue for months or years. The study coordinator will provide specific timeline information during your screening call.
Data: ClinicalTrials.gov · synced May 22, 2026 · Source of record for eligibility and locations