Clinical trial Recruiting at 1 site Interventional Ages 65 to 100

Using light and sound therapy to treat Alzheimer's disease

Official title: Chronic Treatment of Alzheimer's Disease With Gamma Frequency Stimulation

Run by Massachusetts Institute of Technology · NCT05655195 · Data updated 2026-11-12

This study is testing whether a light and sound device can help people with mild Alzheimer's disease improve their memory and brain function over six months.

More Alzheimer's Disease trials

Quick facts

Study typeInterventional
Ages65 Years to 100 Years
SexAll
Enrollment60 (estimated)
SponsorMassachusetts Institute of Technology
Academic / other
Locations1 site (Cambridge, Massachusetts)
StatusRecruiting
StartedDecember 14, 2022
Main results expectedSeptember 1, 2026
Study endsSeptember 1, 2026
Registry record updatedMarch 30, 2026
Trial IDNCT05655195 on ClinicalTrials.gov

Is this trial a fit for you?

Likely a good fit

Ideal candidates are individuals aged 65-100 with a diagnosis of mild Alzheimer's disease and an MMSE score between 19-26.

Probably not a fit

Patients currently on amyloid-reducing therapy or those with significant cerebral microbleeds may not benefit from this study.

A plain-English reading of the study's rules. Only the study team can confirm whether you qualify.

What this trial studies

This study investigates the effects of a light and sound device that stimulates the brain at 40Hz on individuals with mild Alzheimer's disease. Participants will use the device at home daily for six months, with their progress monitored through EEG, blood tests, microbiome analysis, MRI scans, and cognitive assessments during three in-person visits. The goal is to determine if this therapy can enhance gamma wave activity in the brain, reduce toxic protein deposits, and improve memory function. The study aims to recruit 60 participants, including a small cohort of early-onset Alzheimer's patients.

Why it matters

Potential benefit: If successful, this therapy could provide a novel, non-invasive treatment option for improving cognitive function in Alzheimer's patients.

How similar studies have gone: While this approach is innovative, previous studies have shown promise in using light and sound stimulation to enhance gamma wave activity in animal models, but human applications are still largely untested.

Who can join: the full rules

Show full inclusion / exclusion criteria
Inclusion Criteria:

Subjects may be enrolled into the study if they meet all of the following criteria:

* Subject is between the ages of 65 - 100.
* Subject must have mild Alzheimer's disease with a Mini Mental State Exam (MMSE) score of 19-26.
* Subject is willing to sign informed consent document.
* If subject is deemed to not have capacity to sign the informed consent, he/she will need a legally authorized representative to provide surrogate consent.
* Able to complete the 1st month of at home stimulation at their primary residence. If subjects plan to spend more than 1 week away from their primary residence during the trial, their inclusion must be assessed by the research team.

Exclusion Criteria:

Subjects who meet any of the following conditions will not be enrolled in the study:

* Subjects who do not have healthcare.
* Subjects who are currently taking amyloid reducing therapy.
* Subjects who have \> 4 cerebral microbleeds or 1 macrobleed in their brain
* Active treatment on a dosage of one or more psychiatric agents (e.g. antidepressants, antipsychotics, etc) for LESS THAN three months (a stable dose for greater than or equal to three months is ok).
* Subjects who are actively diagnosed with cancer and undergoing cancer-related treatments
* Subjects who are being treated with N-methyl-D-aspartate (NMDA) receptor antagonists (eg. Memantine).
* Subjects on medications that lower seizure threshold such as wellbutrin, ciprofloxacin, levofloxacin, etc.
* Subjects with history of seizure or epilepsy
* Subjects with clinically significant suicide risk and/or suicide attempt in the past 1 year.
* Subjects with behavioral problems such as aggression/agitation/impulsivity that might interfere with their ability to comply with protocol.
* Subjects with untreated or unstable depression
* Active treatment with one or more anti-epileptic agent.
* Subjects who have had a stroke within the past 24 months.
* Subjects who have had eye surgery in the last 3 months or are scheduled to have eye surgery in the next 6 months (during the study)
* Subjects diagnosed with migraine headache.
* Subjects who have an active implantable medical device including but not limited to implantable cardioverter defibrillator (ICD), deep brain stimulator (DBS), cardiac pacemaker, and/or sacral nerve stimulator.
* Subjects who have profound hearing or visual impairment.
* Subjects who have a life expectancy of less than 2 years.
* Subjects who are pregnant.
* Current or past history of any neurological disorder other than dementia, such as epilepsy, stroke, progressive neurologic disease (e.g. multiple sclerosis) or intracranial brain lesions; and history of previous neurosurgery or head trauma that resulted in residual neurologic impairment.

Where it's running

  • Massachusetts Institute of Technology
    Cambridge, Massachusetts, United States
    Recruiting

Study contacts

  • Principal investigator: Li Huei Tsai, PhD — Massachusetts Institute of Technology
  • Study coordinator: gamma wave
  • Email: gamma.wave@mit.edu
  • Phone: 617-258-7723

Similar studies

Other studies for the same condition or treatment. Recruiting studies are listed first.

How to take part

  1. Review the eligibility criteria above with your treating physician.
  2. Check the official listing on ClinicalTrials.gov for the latest contact details and recruitment status.
  3. Contact the study coordinator or principal investigator to ask for pre-screening. Pre-screening is free and never obligates you to enroll.
Last reviewed 2026-11-14 by the Find a Trial editorial team. Information on this page is for educational purposes and is not medical advice. Always consult qualified healthcare professionals about clinical trial participation.