Zapping the brain to save memories: early trial shows promise
NCT ID NCT05327257
First seen Jun 25, 2026 · Last updated Jun 27, 2026 · Updated 1 time
Summary
This small pilot study tested whether a non-invasive brain stimulation technique called iTBS rTMS could improve memory in 25 adults with mild cognitive impairment (MCI). The main goal was to see if the treatment was feasible and acceptable, while also checking for any memory benefits. Results are still being analyzed, but this early work could lead to larger trials exploring a drug-free way to ease memory symptoms.
What this could mean
Our plain-language read of the trial. This is informational only, not medical advice or a prediction.
- Active substance
- intermittent theta burst stimulation (iTBS) repetitive transcranial magnetic stimulation (rTMS)
- What this could lead to
- If it works, this could point toward a non-drug treatment to ease memory problems in people with mild cognitive impairment.
- What could go wrong
- This is a very small, early pilot study with only 25 participants, focused on feasibility. It may not show clear memory benefits, and results may not apply to everyone with MCI.
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.
- Phase
-
Not a phased trial
Phase numbers describe drug development. The registry uses this when they do not apply, as it does for trials of devices, procedures or behaviour changes, and for observational studies.
- Participants
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25 people
The number who actually took part.
- Started
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Aug 2022
- Finished
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Dec 2025
- Lead sponsor
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Other sponsor
The registry's catch-all category, for sponsors it does not file as a company, a government agency, or a research network.
Who can take part
This study's own entry requirements. Only the study team can say for certain whether you qualify.
- Ages
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55 to 90 years
- Sex
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Anyone
- Healthy volunteers
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Accepted
You do not need to have the condition being studied to take part.
Show the full entry requirements Hide 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 * Must speak English fluently * Diagnosis of MCI as defined by: * Clinical diagnosis by a neurologist * Neuropsychological testing support of MCI * Meet criteria for MCI * Subjective cognitive decline reported by participant and/or an informant * Objective memory impairment in one or more cognitive domains for age * Essentially preserved general cognitive function * Largely intact functional activities * Does not meet criteria for dementia as judged by a clinician * Eligible for transcranial magnetic stimulation (TMS) based on safety criteria * Clinical Dementia Rating=0.5 * Geriatric Depression Scale score less than 6 * Medically stable and in good general health * Not pregnant, lactating, or of childbearing potential * Stable medication regimen for at least 4 weeks prior to baseline visit * Adequate visual and auditory abilities to complete neuropsychological testing * Ability to provide informed consent * Have a care partner who is available to accompany the participant to study visits for the duration of the protocol. Exclusion Criteria * Inability to communicate in the English language * Meet criteria for dementia * Contraindications to TMS or MRI, including patients who have * conductive, ferromagnetic or other magnetic-sensitive metals implanted in their head or within 30 cm of the treatment coil (e.g., cochlear implants, implanted electrodes/stimulators, aneurysm clips or coils, stents, bullet fragments or jewelry) * active or inactive implants, including deep brain stimulators, cochlear implants, vagus nerve stimulators or implanted device leads * Any true positive findings on the TMS safety screening form * Prior exposure to TMS, electroconvulsive therapy (ECT), or any neurostimulation within the past 12 months * History of epilepsy or seizures * Medical conditions that increase risk of seizures * History of traumatic brain injury * History of intracranial mass or lesion * History of stroke, including hemorrhagic stroke and ischemic stroke * Psychiatric disorders * Primary psychotic disorder (schizophrenia, schizoaffective, or schizophreniform disorder), any history * Primary mood disorder (major depressive disorder, bipolar disorder) within the past 12 months * Substance use disorder (except caffeine and nicotine) within the past 12 months * Active symptoms of depression, anxiety, mania, psychosis, or substance use (except caffeine and nicotine) within the past year * Active symptoms of depression will be identified based on geriatric depression scale ≥ 6 * Other active symptoms of psychiatric conditions to be determined by study investigators * Sleep disorders that are considered clinically significant and not sufficiently treated by the investigative team, including untreated obstructive sleep apnea (apnea-hypopnea index \>15), untreated/suboptimally treated REM sleep behavior disorder, untreated/suboptimally treated restless legs syndrome * Pregnancy or suspected pregnancy * Participation in another concurrent interventional clinical trial * Any unstable medical condition * Inability to provide informed consent * Inability to adhere to the protocol
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Conditions
The condition(s) this trial relates to.
As listed by the trial registrant
The condition terms exactly as the trial's registrant entered them.
Contacts and locations
Locations
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Mayo Clinic in Rochester
Rochester, Minnesota, 55905, United States
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