Modulation of Sensory Acuity With Transcranial Magnetic Stimulation (TMS)

Behavioral and Neural Measures of Speech Motor Control

The purpose of this research study is to understand how the brain processes and controls speech in healthy people. The investigators are doing this research because it will help identify the mechanisms that allow people to perceive their own speech errors and to learn new speech sounds, which may be applied to people who have communication disorders. 15 participants will be enrolled into this part of the study and can expect to be on study for 4 visits of 2-4 hours each.

Study Overview

• Status: Not yet recruiting
• Conditions: Speech
• Intervention / Treatment: Device: TMS; Behavioral: Speaking Tasks

Detailed Description

The overall study (Establishing the clinical utility of sensorimotor adaptation for speech rehabilitation) aims to understand how cognitive, perceptual, and motor processes are integrated in the control of speech movements. The investigators study how this complex skill is performed in healthy speakers to understand how this system functions, how this skill relates to the perception of speech, and what role different parts of the brain play in this process. Different studies look at how speech motor control is executed, maintained, and changed. Overall, the study will recruit 329 participants over the course of 5 years. Participants can expect to be on study for up to 3 weeks.

The entire study is composed of 8 experiments and 6 interventions. The present record represents the experiments involving transcranial magnetic stimulation (TMS), i.e. Experiment 8: Modulating sensorimotor adaptation through TMS to somatosensory cortex.

This paradigm uses theta-burst transcranial magnetic stimulation (tbTMS) to modulate the excitability of sensory cortices to examine the effect on sensory acuity and sensorimotor adaptation. Participants will complete three total sessions targeting primary somatosensory cortex (S1): one using intermittent theta-burst stimulation (iTBS), one using continuous theta-burst stimulation (cTBS), and one with sham stimulation.

The effect of the stimulation on somatosensory adaptation will be measured using a vowel centralization feedback perturbation experiment: after stimulation, participants will produce words under conditions of altered auditory feedback, and the investigators will measure changes in produced vowels as a result of these alterations.

• Study Type: Interventional
• Enrollment (Estimated): 15
• Phase: Not Applicable

Contacts and Locations

• Study Contact: Name: Carrie Niziolek, PhD; Phone Number: 608-890-0192; Email: cniziolek@wisc.edu

Study Locations

• United States
  • Wisconsin
    • Madison, Wisconsin, United States, 53705
      • University of Wisconsin
      • Contact: Chris Naber; Phone Number: 608-262-5776; Email: speechmotor@waisman.wisc.edu

Participation Criteria

Eligibility Criteria

• Ages Eligible for Study: Adult; Older Adult
• Accepts Healthy Volunteers: Yes

Description

Inclusion Criteria (Control):

• English-speaking adults
• normal hearing and speech
• no history of stroke or neurological conditions

Exclusion Criteria:

• Native language other than English
• Any neurological disorders other than the disorder of interest
• Any history of hearing disorders
• Uncorrected vision problems that prevent participants from seeing visually-presented stimuli
• Significant cognitive impairments that prevent participants from carrying out the task or from giving informed consent
• Vulnerable populations (minors and prisoners)

• Additional exclusionary criteria for TMS:

  • Implanted paramagnetic materials (metal clips, plates, pacemakers, etc.)
  • Increased risk in the event of a seizure
  • Serious heart disease
  • Increased intracranial pressure
  • Pregnancy
  • History of seizures
  • Family history of epilepsy
  • Epileptogenic medications
  • Chronic or transient disruption of sleep (including jet lag)
  • History of fainting
  • Chronic or transient increase in stressful experiences
  • Use of illegal drugs

Study Plan

How is the study designed?

Design Details

• Primary Purpose: Basic Science
• Allocation: N/A
• Interventional Model: Single Group Assignment
• Masking: None (Open Label)

Number of Arms

1

Arms and Interventions

Participant Group / Arm

Intervention / Treatment

Experimental: Healthy Adult Speakers; healthy adult participants across the lifespan in three groups:18-35, 36-55, and 56+

Device: TMS; This paradigm uses theta-burst transcranial magnetic stimulation (tbTMS) to modulate the excitability of sensory cortices to examine the effect on sensory acuity and sensorimotor adaptation. Participants will complete three total sessions targeting primary somatosensory cortex (S1): one using intermittent theta-burst stimulation (iTBS), one using continuous theta-burst stimulation (cTBS), and one with sham stimulation.; Other Names: transcranial magnetic stimulation (continuous and intermittent theta-burst stimulation), electromyography (EMG); Behavioral: Speaking Tasks; Participants will produce four training words under a vowel centralization feedback paradigm in which auditory feedback is altered. The investigators will measure changes in produced vowels as a result of the altered feedback in concert with the different stimulation regimes described in the TMS intervention.

What is the study measuring?

Primary Outcome Measures

Outcome Measure	Measure Description	Time Frame
Acoustic vowel space measures: AVS (acoustic vowel spacing)/VSA (vowel space area)	For speech production tasks, the primary acoustic measure will be adaptation to the altered feedback, defined here as increases in AVS (average vowel spacing), the mean of pairwise formant distances between vowels. The investigators will also include a global measure of working vowel space, the quadrilateral vowel space area (qVSA). qVSA measures the area (in Hz^2) between the F1/F2 coordinates of the corner vowels. Both the more local AVS and more global qVSA have been linked to speech intelligibility in various types of dysarthria.	up to 1 hour

Collaborators and Investigators

• Sponsor: University of Wisconsin, Madison
• Collaborators: National Institute on Deafness and Other Communication Disorders (NIDCD)
• Investigators: Principal Investigator: Carrie Niziolek, PhD, University of Wisconsin, Madison

Publications and helpful links

Helpful Links

• Link to study record for experiment 5 [NCT05286658]
• Link to study record for experiment 7 [NCT05723575]

Study record dates

Study Major Dates

• Study Start (Estimated): August 1, 2024
• Primary Completion (Estimated): August 1, 2025
• Study Completion (Estimated): August 1, 2025

Study Registration Dates

• First Submitted: January 22, 2024
• First Submitted That Met QC Criteria: January 22, 2024
• First Posted (Estimated): January 31, 2024

Study Record Updates

• Last Update Posted (Estimated): January 31, 2024
• Last Update Submitted That Met QC Criteria: January 22, 2024
• Last Verified: January 1, 2024

More Information

Terms related to this study

• Keywords: speech motor control; vocal learning
• Other Study ID Numbers: 2017-1128 TMS (Exp 8); Protocol Version 8/25/2021 (Other Identifier: UW Madison); A481800 (Other Identifier: UW Madison); 1R01DC019134-01A1 (U.S. NIH Grant/Contract)

Plan for Individual participant data (IPD)

• Plan to Share Individual Participant Data (IPD)?: YES

Drug and device information, study documents

• Studies a U.S. FDA-regulated drug product: No
• Studies a U.S. FDA-regulated device product: No