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Investigating the effect of TDCS on stuttering

Investigating the effect of stimulating the left hemisphere and inhibiting the right hemisphere of brain on severity of stuttering in adults

Status
Recruiting
Phases
Unknown
Study type
Interventional
Source
IRCT
Registry ID
IRCT20250415065346N1
Enrollment
45
Registered
2025-08-20
Start date
2025-08-02
Completion date
Unknown
Last updated
2025-09-15

For informational purposes only — not medical advice. Sourced from public registries and may not reflect the latest updates. Terms

Conditions

stuttering. ?????? ?? ?? ????? ???? ?? ????? ???? ??????? ?? ????? ???? ?? ???. ? ?? ?? ????? ?? ??? ???? ?? ????? ?????? ????? ?? ???? ?? ???. ??????? ??? ???? ??? ??? ?? ????? ?? ????? ???? ?? ????? ????? ? ?? ?? ????? ?? ????? ?????? ???? ??? ?????? ?? ????? ????

Interventions

Intervention 1: Intervention group: stimulating inferior frontal of left hemisphere. Intervention 2: Intervention group: Inhibiting SMA of right hemisphere. Intervention 3: Intervention group: left in

Sponsors

Mashhad University of Medical Sciences
Lead Sponsor

Eligibility

Sex/Gender
All
Age
18 Years to 50 Years

Inclusion criteria

Inclusion criteria: Persian-speaking adults aged 18 to 50 with developmental stuttering

Exclusion criteria

Exclusion criteria: People with a history of severe head trauma, meningitis, encephalitis, and any acute medical conditions including kidney, liver, lung, and heart disease People who are currently undergoing medication or speech therapy for stuttering. People with any language, speech, or communication disorder other than stuttering. Having a history of mental or neurological illness Having a personal or family history of seizures or epilepsy Having a history of migraines

Design outcomes

Primary

MeasureTime frame
Stuttering severity. Timepoint: before trial, one hour after first session, a week later and 3 weeks later. Method of measurement: SSI-4.

Secondary

MeasureTime frame
Concomitant physical behaviors. Timepoint: before treatment/ one hour after first session / one week and 3 weeks later. Method of measurement: 5 scale score in stuttering severity instrument-4.;Duration of stuttering. Timepoint: before treatment/ one hour after first session / one week and 3 weeks later. Method of measurement: Mean of the three longest moments of stuttering.;Stuttering frequency. Timepoint: before treatment/ one hour after first session / one week and 3 weeks later. Method of measurement: stuttering severity percentage= stuttered syllable/number of all syllables.

Countries

Iran (Islamic Republic of)

Contacts

Public ContactMohammadhossein Roohani ravari

Mashhad University of Medical Sciences

rohanimh313@gmail.com+98 51 3843 0634

Outcome results

None listed

Source: IRCT (via WHO ICTRP) · Data processed: Feb 4, 2026