Could a gentle brain ZAP boost speech recovery after stroke?
NCT ID NCT06048159
First seen Jul 10, 2026 · Last updated Jul 10, 2026
Summary
This trial investigates whether a non-invasive brain stimulation technique called tACS, applied during speech therapy, can help people recover language abilities after a stroke. The study includes 120 adults who have had a left-hemisphere stroke and experience aphasia (difficulty with language). Participants receive either real or sham tACS while doing speech exercises, and researchers measure changes in memory for sounds and everyday communication.
What this could mean
Our plain-language read of the trial. This is informational only, not medical advice or a prediction.
- Active substance
- transcranial alternating current stimulation (tACS)
- What this could lead to
- If it works, this could point toward a new way to boost speech therapy and improve language recovery after a stroke.
- What could go wrong
- This is an early-stage study with a moderate number of participants. The effects may be small or not translate to real-world communication improvements.
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
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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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About 120 people
The number the study aims to enrol. It can still change while the study runs.
- Started
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Nov 2023
- Expected to finish
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Jan 2033
An estimate. End dates often move.
- 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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18 years and older
- Sex
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Anyone
- Healthy volunteers
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Not accepted
This study is not open to healthy volunteers. The entry requirements below say who it is open to.
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: * Diagnosed with left hemisphere stroke/aphasia * Consent date \>= 1 month after stroke onset * Fluent in English * 18 years of age or older Exclusion Criteria: * Severe cognitive, auditory or visual impairments that would preclude cognitive and language testing * Presence of major untreated or unstable psychiatric disease * A chronic medical condition that is not treated or is unstable * The presence of cardiac stimulators or pacemakers * Contraindications to MRI or tACS, e.g. patients with metallic implants, and/or history of skull fractures, pregnancy, skin diseases * History of ongoing or unmanaged seizures * History of dyslexia or other developmental learning disabilities
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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.
How to take part
Only the study team decides who joins. These are the ways to reach them.
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The places running it
1 site. The list below names each one and where it is.
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The official record
ClinicalTrials.gov lists the study team's own contact details, including names and phone numbers. We don't republish those.
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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
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Medical College of Wisconsin
RECRUITINGMilwaukee, Wisconsin, 53226, United States
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Other studies related to the condition(s) this trial covers.
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- Correlation of visual and motor deficits in stroke patients
- Pilot study on the effects induced by an electromyographic-controlled functional electrical stimulator (FitFES) for upper limb rehabilitation in post-stroke patients
- Brazilian version of a behavior change intervention to support healthy lifestyle adoption after stroke - iVIDAVC: protocol for a pilot randomized study
- Determination of efficacy of sustained motor contraction generated using StimWave peripheral nerve stimulator
- Can a PET tracer reveal hidden brain inflammation?