AphasiaNCT04742894
Neural Bases of Vocal Sensorimotor Impairment in Aphasia
A study testing Visual Feedback Training in people with Aphasia, run by The University of Texas at Dallas at 3 sites in United States.
Trial summary
Aphasia is the most common type of post-stroke communication disorder characterized by deficits in speech comprehension, production and control. While recovery can be promoted with speech therapy, improvement remains modest and typically requires a large number of sessions contributing to rising health care costs. Read more about this study
- Who is it for?
- Ages 21 to 75 yearsHealthy volunteers can take part
- Conditions the study is for
- Aphasia
- What is being tested?
- Visual Feedback Training
- Type of treatment
- Lifestyle or therapy programme
- Could I receive a placebo?
- No, everyone receives an active treatment
- How many people
- 100 participants
- Where
- 3 sitesUnited States
- Study dates
- 11 Jul 2021to 28 Feb 2027
- Phase
- Interventional
- Are there results?
- Not yet: the study is under way
Key requirements
Who can take part, as listed by the sponsor. Only the study team can confirm whether you are eligible, so take this list to your doctor.
- Ages 21 to 75 years
- All sexes
- Healthy volunteers accepted
- Adult, Older adult
Who may be able to join
- A total of 50 individuals with aphasia due to chronic left hemisphere stroke (> 6 months post-stroke) and 50 age- and gender-matched healthy control subjects will be recruited in this study. The general inclusion criteria for all subjects include: age range 21-75 years, right-handed, and native speaker of English. The aphasic subjects have previously undergone neuro-psychological speech/language testing and have been diagnosed with one type of aphasia (e.g., Broca's, Wernicke's, conduction or anomic). Subjects in the control group will meet the inclusion criteria with having normal voice, speech, language, and hearing function and no history of neurological and psychiatric disorder. We expect that a significant proportion of aphasic patients will show symptoms associated with Apraxia of Speech (AOS) or dysarthria; however, these patients will not be excluded unless their deficits will preclude them from performing the experimental tasks.
Who cannot join
- Subjects with moderate to severe hearing, memory, and/or cognitive impairments will be excluded for both groups. In addition, subjects with history of peripheral laryngeal disorders (e.g., paresis or vocal fold paralysis) will be excluded. Subjects will undergo safety screening and will be excluded if there are any factors counter-indicative for EEG and/or MRI scanning.
Trial locations and contacts
3 sites in 1 country. Contact the study team or a site near you to ask about taking part.
United States3 sites, 3 recruiting
- Not yet recruiting
University of South Carolina
Columbia, South Carolina, 29208
Julius Fridriksson, PhD, 803-777-5931, FRIDRIKS@mailbox.sc.edu
Christopher Rorden, PhD
- Not yet recruiting
University of California Irvine
Irvine, California, 92697
Gregory Hickok, PhD, 949-824-1409, gshickok@uci.edu
- Recruiting
The University of Texas at Dallas
Richardson, Texas, 75080
Roozbeh Behroozmand, PhD, 972-883-3062, roozbeh.behroozmand@utdallas.edu
About this study
Aphasia is the most common type of post-stroke communication disorder characterized by deficits in speech comprehension, production and control. While recovery can be promoted with speech therapy, improvement remains modest and typically requires a large number of sessions contributing to rising health care costs. Traditional aphasia therapy focus on enhancing speech motor output; however, recent evidence suggests that the auditory feedback also plays a critical role in fluent speech. Therefore, a key step toward refining treatment strategies is to develop objective biomarkers that can probe the integrity of sensorimotor mechanisms of speech auditory feedback and identify their impaired function in patients with post-stroke aphasia. This study aims to examine the behavioral, neurophysiological (EEG), and neuroimaging (fMRI) biomarkers of speech impairment following stroke with focus on understanding the role of auditory feedback for speech production and control. We plan to test individuals with post-stroke aphasia and a matched neuroptypical control group during different speech production tasks under the altered auditory feedback paradigm. In addition, we aim to examine the effect of audio-visual feedback training on enhancing communication ability during speech. These biomarkers will be combined with existing lesion-symptom-mapping data in the aphasic group in order to identify the patterns of brain damage and diminished structural connectivity within the auditory-motor areas of the left hemisphere that predict impaired sensorimotor processing of speech in aphasia. The long-term goal of this research is to develop a model for identifying the source of sensorimotor deficit and improve diagnosis and targeted treatment of speech disorders in aphasia.
- Conditions
- Aphasia
- Being tested
- Visual Feedback Training
- Medical subject headings
- Aphasia
What participants receive
What participants receive. In a randomised study each person is assigned to one group by chance.
Visual Feedback TrainingBehavioural
Participants will be trained to work with a computer setup to control the position of a visual cursor on the screen using their speech while their auditory feedback is altered. The goal of the training is to help improve speech production and motor control ability.
| Study group | Role | What they receive |
|---|---|---|
| Aphasia Group | Experimental | Not described Receives: Behavioral: Visual Feedback Training |
| Control Group | Experimental | Not described Receives: Behavioral: Visual Feedback Training |
What is being measured
The primary outcome is the main question the study is designed to answer.
Speech Production and Motor Control Ability
Participants accuracy in using their speech for controlling the visual cursor will be assessed via measuring their deviation from hitting a pre-defined target on the screen.
Measured: 2 weeks
Timeline
From the start of the study to its completion; the mark is today. Estimated dates are the sponsor’s plan.
- First posted8 Feb 2021
- Study start11 Jul 2021
- Primary completion28 Feb 2027 (estimated)
- Study completion28 Feb 2027 (estimated)
Resources
- Official record on ClinicalTrials.govThe registry entry this page is built from, with its full change history.
- Other trials for AphasiaStudies of the same condition, open and under way.
- What the trial phases meanHow a treatment moves from first tests in people to approval.
More details
For doctors and researchers: how the study is designed, who runs it, and its registry IDs.
Study design
- Study type
- Interventional
- Phase
- Phase N/A
- Primary purpose
- Basic science
- Allocation
- Randomised
- Intervention model
- Parallel groups
- Masking
- Single blind
- Who is masked
- Participant
- Enrolment
- 100 participants (estimated)
Sponsor and investigators
- Lead sponsor
- The University of Texas at Dallas
- Sponsor type
- University, hospital or other
- Collaborators
- National Institute on Deafness and Other Communication Disorders (NIDCD)
- Responsible party
- Principal investigator, Dr. Roozbeh Behroozmand, The University of Texas at Dallas
IDs, dates and publications
- ClinicalTrials.gov ID
- NCT04742894
- Sponsor's protocol ID
- IRB-24-325
- Other IDs
- R01DC018523
- Status last verified
- Jul 2026
- First submitted
- 3 Feb 2021
- Last updated
- 28 Jul 2026
- Results posted
- No
- Data monitoring committee
- No
- FDA-regulated drug
- No
- FDA-regulated device
- No
Study at a glance
From the registry record, last updated by the sponsor on 28 Jul 2026. Recruitment status is as the sponsor reported it: confirm with the study team.
- Official title
- Neural Bases of Vocal Sensorimotor Impairment in Aphasia
- ClinicalTrials.gov ID
- NCT04742894
- Acronym / sponsor ID
- IRB-24-325
- Conditions
- Aphasia
- Study type
- Interventional
- Recruitment status
- Recruiting
- Enrolment
- 100 participants (estimated)
- Lead sponsor
- The University of Texas at DallasUniversity, hospital or other
- Collaborators
- National Institute on Deafness and Other Communication Disorders (NIDCD)
- Study start
- 11 Jul 2021 (actual)
- Primary completion
- 28 Feb 2027 (estimated)
- Study completion
- 28 Feb 2027 (estimated)
- First posted
- 8 Feb 2021 (actual)
- Results
- Not posted in the source record
Clinical summary
The research question as the sponsor registered it. This describes what the study plans to test, not what it found.
Aphasia is the most common type of post-stroke communication disorder characterized by deficits in speech comprehension, production and control. While recovery can be promoted with speech therapy, improvement remains modest and typically requires a large number of sessions contributing to rising health care costs. Traditional aphasia therapy focus on enhancing speech motor output; however, recent evidence suggests that the auditory feedback also plays a critical role in fluent speech. Therefore, a key step toward refining treatment strategies is to develop objective biomarkers that can probe the integrity of sensorimotor mechanisms of speech auditory feedback and identify their impaired function in patients with post-stroke aphasia. This study aims to examine the behavioral, neurophysiological (EEG), and neuroimaging (fMRI) biomarkers of speech impairment following stroke with focus on understanding the role of auditory feedback for speech production and control. We plan to test individuals with post-stroke aphasia and a matched neuroptypical control group during different speech production tasks under the altered auditory feedback paradigm. In addition, we aim to examine the effect of audio-visual feedback training on enhancing communication ability during speech. These biomarkers will be combined with existing lesion-symptom-mapping data in the aphasic group in order to identify the patterns of brain damage and diminished structural connectivity within the auditory-motor areas of the left hemisphere that predict impaired sensorimotor processing of speech in aphasia. The long-term goal of this research is to develop a model for identifying the source of sensorimotor deficit and improve diagnosis and targeted treatment of speech disorders in aphasia.
Study design
- Primary purpose
- Basic science
- Allocation
- Randomised
- Intervention model
- Parallel groups
- Masking
- Single blind (participant)
- Number of arms
- 2
| Arm | Type | Receives |
|---|---|---|
| Aphasia Group | Experimental | Behavioral: Visual Feedback Training |
| Control Group | Experimental | Behavioral: Visual Feedback Training |
Who may qualify
- Ages
- 21 to 75 years
- Sex
- All
- Healthy volunteers
- Accepted
- Age groups
- Adult, Older adult
Key inclusion criteria (1 listed)
- A total of 50 individuals with aphasia due to chronic left hemisphere stroke (> 6 months post-stroke) and 50 age- and gender-matched healthy control subjects will be recruited in this study. The general inclusion criteria for all subjects include: age range 21-75 years, right-handed, and native speaker of English. The aphasic subjects have previously undergone neuro-psychological speech/language testing and have been diagnosed with one type of aphasia (e.g., Broca's, Wernicke's, conduction or anomic). Subjects in the control group will meet the inclusion criteria with having normal voice, speech, language, and hearing function and no history of neurological and psychiatric disorder. We expect that a significant proportion of aphasic patients will show symptoms associated with Apraxia of Speech (AOS) or dysarthria; however, these patients will not be excluded unless their deficits will preclude them from performing the experimental tasks.
Key exclusion criteria (1 listed)
- Subjects with moderate to severe hearing, memory, and/or cognitive impairments will be excluded for both groups. In addition, subjects with history of peripheral laryngeal disorders (e.g., paresis or vocal fold paralysis) will be excluded. Subjects will undergo safety screening and will be excluded if there are any factors counter-indicative for EEG and/or MRI scanning.
Eligibility is decided by the study team after screening; this overview does not establish that a patient qualifies. Full inclusion and exclusion criteria.
Interventions
| Intervention | Type | Arms |
|---|---|---|
| Visual Feedback TrainingParticipants will be trained to work with a computer setup to control the position of a visual cursor on the screen using their speech while their auditory feedback is altered. The goal of the training is to help improve speech production and motor control ability. | Behavioural | Aphasia Group, Control Group |
Primary outcome
Speech Production and Motor Control Ability
Time frame: 2 weeks
Participants accuracy in using their speech for controlling the visual cursor will be assessed via measuring their deviation from hitting a pre-defined target on the screen.
Results and safety
This study is still under way. Results are not available in the source record yet.
Research links
- Official record on ClinicalTrials.govLast updated by the sponsor 28 Jul 2026.
Related trials for Aphasia
Not yet recruiting
BrainGate2: Feasibility Study of an Intracortical Neural Interface System for Persons With Aphasia (BG-Aphasia-01)
Expressive Aphasia, Aphasia Following Cerebral Infarction
Recruiting
Effect of Anomia Rehabilitation Combined With Metacognitive Training in Patients With Chronic Vascular Aphasia
Aphasia, Stroke
Not yet recruiting
Restoring Speech With an Intracortical Neuroprosthesis for Post-Stroke Agrammatic Aphasia (BG-Aphasia-02)
Aphasia, ALS
Not yet recruiting
Cerebellar Brain Stimulation Plus Language Therapy for People at Risk of Poor Aphasia Recovery After Stroke
Aphasia, Stroke
Not yet recruitingObservational study
Detecting and Predicting Post-stroke Cognitive Impairment Using the Oxford Cognitive Screen
Stroke, Ischemic Stroke
Referral and contact
AzTrials does not enrol participants or take referrals. Contact the study team or a site listed below; they decide who can take part.
3 sites in 1 country: see every site and its status.
Questions about this trial
What is this clinical trial studying?
A study testing Visual Feedback Training in people with Aphasia, run by The University of Texas at Dallas at 3 sites in United States.
The full registered description is in the About this study section and the official record.
Who may be eligible to take part?
The sponsor lists 1 inclusion and 1 exclusion criteria. Eligibility is decided by the study team after screening, so read the full criteria and contact a listed site.
Is this clinical trial currently recruiting?
The record says: looking for participants now, as of the sponsor's last update on 28 Jul 2026. Status can change between updates, so confirm with the study contact before making plans.
Where is the study taking place?
The record lists 3 sites in United States. Whether a site is taking part right now should be confirmed with that site. See every site.
What are the possible benefits and risks?
They depend on the study and the treatment, and no study can promise a benefit. The study team explains the known risks during informed consent, before anyone joins; the record itself does not list them.
Are results available for this study?
This study is still under way. Results are not available in the source record yet.
How can a doctor refer a patient or contact the research team?
Contact Roozbeh Behroozmand, PhD (9728833062, roozbeh.behroozmand@utdallas.edu), or a site near the patient. AzTrials does not enrol participants or take referrals.
What does the primary outcome measure?
Speech Production and Motor Control Ability (time frame: 2 weeks). It is what the study was designed to measure, not a finding.
Where can I read the original study information?
Does a listing mean the treatment is approved or proven to work?
No. A listing means the study is registered. It does not show that the treatment is safe, works, or is approved by a regulator.
How often is this information updated?
AzTrials copies changed records from ClinicalTrials.gov every night and reloads the whole registry every week. The sponsor last updated this record on 28 Jul 2026; AzTrials last refreshed its copy on 8 Nov 2026.