Effects of tDCS on Apraxia of Speech in Non-Fluent Primary Progressive Aphasia
Public ClinicalTrials.gov record NCT04486586. Field values are reproduced from the official study page; the official ClinicalTrials.gov record remains the source of truth for eligibility, enrollment, and contact information.
Data is sourced from official ClinicalTrials.gov public API records. Always review the official ClinicalTrials.gov record for the latest information.
Official title
Effects of Transcranial Direct Current Stimulation in Primary Progressive Aphasia (PPA)
Brief summary
Reproduced verbatim from the official ClinicalTrials.gov record. Not medical advice.
Primary progressive aphasia (PPA) is a neurodegenerative disease that affects first and foremost language abilities. There are three different variants of PPA, each a relatively distinct speech and language profile. For individuals with non-fluent variant PPA (nfvPPA), a core symptom is apraxia of speech (AOS), which is defined as an oral motor speech disorder. Such a disorder inhibits one's ability to translate speech plans into motor plans and results in longer segmental durations and reduced rate of syllabic production. This research project investigates the behavioral and neuromodulatory effects of transcranial direct current stimulation (tDCS) during language therapy in participants with nfvPPA over time. Anodal tDCS targeting the left inferior frontal gyrus (IFG) administered in combination with language therapy is expected to be more beneficial when compared to language therapy alone (sham). The investigators believe tDCS during language therapy will 1) improve language performance or decrease rate of decline, 2) promote better-sustained effects at 2 weeks and 2 months post-treatment, and 3) produce generalization to untrained language items and some other cognitive functions. Resting-state fMRI, diffusion tensor imaging (DTI), and volumetric data are also collected to investigate changes in functional brain connectivity associated with tDCS in individuals with PPA. A better understanding of the therapeutic and neuromodulatory mechanisms of tDCS as an adjunct to language therapy in nfvPPA may have a significant impact on the development of effective therapies for PPA, and may offer insight into ways of impeding neurodegeneration that may improve patients' quality of life, as well as extend patients' ability to work and manage patients' affairs.
Study identification
- NCT ID
- NCT04486586
- Recruitment status
- Withdrawn
- Study type
- Interventional
- Phase
- Not applicable
- Enrollment
- Not listed
Conditions and interventions
Conditions
Interventions
Device
Eligibility (public fields only)
- Age range
- 50 Years to 90 Years
- Sex
- All
- Healthy volunteers
- Accepts healthy volunteers
This page does not interpret eligibility. Detailed inclusion and exclusion criteria are on the official ClinicalTrials.gov record.
Study timeline
- Start date
- Mar 31, 2013
- Primary completion
- Mar 31, 2025
- Completion
- Mar 31, 2025
- Last update posted
- Apr 23, 2025
2013 – 2025
United States locations
- U.S. sites
- 1
- U.S. states
- 1
- U.S. cities
- 1
| Facility | City | State | ZIP | Site status |
|---|---|---|---|---|
| Johns Hopkins Hospital | Baltimore | Maryland | 21287 | — |
Site contact phone numbers, emails, and investigator names are intentionally not displayed here. Open the official ClinicalTrials.gov record for site contact information.
About this trial record page
- What this page shows
- Public field values for ClinicalTrials.gov record NCT04486586, including study identification, conditions, interventions, eligibility (age, sex, healthy volunteer), timeline, and U.S. site list.
- What this page does not do
- No medical advice, eligibility judgments, treatment recommendations, study quality scoring, or AI-generated medical summaries. No site contact phone numbers, emails, or investigator names.
- Where the data comes from
- Sourced from the official ClinicalTrials.gov public API. The official record is the source of truth.
- Last refresh
- Last update posted Apr 23, 2025 · Synced Sep 5, 2026
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Open the official record
The complete protocol, eligibility criteria, and contact information for NCT04486586 live on ClinicalTrials.gov.