Brain zaps may unlock fluency for people who stutter

NCT ID NCT06740968

Recruiting now Symptom relief Sponsor: University of Michigan Source: ClinicalTrials.gov ↗

First seen Jun 26, 2026 · Last updated Jun 26, 2026

Summary

This study tests whether a gentle, noninvasive electrical current applied to the scalp can improve speech fluency in adults who stutter. Researchers will give 80 participants three sessions of brain stimulation while they read aloud, then measure changes in brain activity and stuttering severity. The goal is to see if this approach could become a new treatment option.

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 noninvasive, drug-free treatment to reduce stuttering in adults.
What could go wrong: This is an early-stage study with only 80 people, testing short-term effects. The stimulation may not produce lasting fluency improvements, and results may not apply to everyone who stutters.

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

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Conditions

The condition(s) this trial relates to.

stutter disorder Stuttering

As listed by the trial registrant

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

STUTTERING, ADULT STUTTERING, CHILDHOOD STUTTERING, DEVELOPMENTAL

Contacts and locations

Locations

University of Michigan
RECRUITING

Ann Arbor, Michigan, 48109, United States

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