- ICH GCP
- US Clinical Trials Registry
- Clinical Trial NCT04074811
Feasibility and Efficacy of rTMS in Healthy Persons (TPD)
Exploring the Feasibility and Efficacy of Repetitive Transcranial Magnetic Stimulation (rTMS) in a Healthy Population
Study Overview
Status
Conditions
Intervention / Treatment
Detailed Description
The short-term goal of this pilot project is to establish the feasibility and efficacy of repetitive transcranial magnetic stimulation (rTMS) on cognitive, behavioral, and physiological measures in a healthy community-recruited sample to plan longer-term programmatic studies focusing on substance use disorder (SUD) populations. Primary Aims are to examine the effect of one session of left dorsolateral prefrontal cortex (DLPFC) rTMS high-frequency (10 Hz) stimulation vs. placebo stimulation (no electromagnetic field but similar auditory and tactile sensations) on: (1) cognitive control, (2), impulsivity, and (3) thermal pain sensitivity. Secondary Aims are to test effects of rTMS on behavioral motivation (monetary incentive delay task, effort choice task), mood (PANAS), peripheral biomarkers (prolactin, BDNF) and collect biosamples for future genotyping.
The investigators recognize the proposed sample size is relatively small to adequately power a full analysis across all outcomes, so will use this study to determine effect sizes for any differences to plan future studies with adequate power. Generally speaking, data will be analyzed using repeated measures ANCOVAs; covariates will include TMS resting motor threshold, sex, and age. Based on sample size calculations, the investigators intend to complete up to 30 subjects. For some outcomes, the results of previous studies indicate that a lower sample size may be appropriate, therefore the investigators will conduct interim analyses at n=18 to calculate effect sizes to determine how many more participants are needed.
Study Type
Phase
- Not Applicable
Contacts and Locations
Study Contact
- Name: Tabitha Moses
- Phone Number: 313-993-7157
- Email: tmoses@med.wayne.edu
Study Locations
-
-
Michigan
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Detroit, Michigan, United States, 48201
- Wayne State University
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-
Participation Criteria
Eligibility Criteria
Ages Eligible for Study
Accepts Healthy Volunteers
Description
Inclusion Criteria:
- Healthy
- Right handed
- 21-60 years of age
- IQ score greater than 80
- Eligible if using tobacco, alcohol, or marijuana fewer than 3 times per week; each "time" must be less than 3 cigarettes or drinks, or less than 1 marijuana "joint"
Exclusion Criteria:
- Under influence of any substances during any session
- Use of illicit substances in the past 30 days
- Pregnant
- Medical conditions that prohibit the use of rTMS (e.g. history of seizures or medications that lower seizure threshold)
- Current DSM-5 Axis I psychiatric disorders, or any history of substance use disorders.
Study Plan
How is the study designed?
Design Details
- Primary Purpose: Basic Science
- Allocation: Randomized
- Interventional Model: Crossover Assignment
- Masking: Single
Arms and Interventions
Participant Group / Arm |
Intervention / Treatment |
---|---|
Sham Comparator: Sham rTMS
Sham rTMS will be applied over the left dorsolateral prefrontal cortex using a sham figure of 8 coil (within-subject crossover).
Sham rTMS will consist of the same auditory and tactile stimuli as the active condition, but does not induce an electromagnetic field and does not affect cortical excitability.
|
The investigators will use the Figure of 8 coil, which affects ~10cm2 of cortical surface.
The active condition will deliver stimulation at 110% of resting motor threshold (RMT).
To determine RMT, the protocol will be: 10 trials of single-pulse TMS on the scalp position of the abductor pollicis brevis muscle (which controls thumb flexion); RMT is the lowest TMS power setting yielding visible motor contraction on >50% of trials.
|
Active Comparator: Active rTMS
Active rTMS will be applied over the left dorsolateral prefrontal cortex using an active figure of 8 coil (within-subject crossover).
In the active rTMS condition, the investigators will use high-frequency (10Hz) dorsolateral prefrontal cortex (dlPFC) stimulation with intensity of 110% of resting motor threshold.
rTMS will consist of 120 trains with 50 stimuli per train (i.e.
5-sec long at 10 Hz) and 10-sec intertrain interval for a total of 6000 pulses.
The entire protocol will last 30 min (120 trains with 5-sec on/10-sec off).
|
The investigators will use the Figure of 8 coil, which affects ~10cm2 of cortical surface.
The active condition will deliver stimulation at 110% of resting motor threshold (RMT).
To determine RMT, the protocol will be: 10 trials of single-pulse TMS on the scalp position of the abductor pollicis brevis muscle (which controls thumb flexion); RMT is the lowest TMS power setting yielding visible motor contraction on >50% of trials.
|
What is the study measuring?
Primary Outcome Measures
Outcome Measure |
Measure Description |
Time Frame |
---|---|---|
Stroop Task (cognitive control)
Time Frame: Change from pre- to 25-minutes post-rTMS stimulation in each session
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Examine the effect of rTMS stimulation on cognitive control as measured by the Stroop Color-Word task.
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Change from pre- to 25-minutes post-rTMS stimulation in each session
|
Stop Signal Task (impulsivity)
Time Frame: Change from pre- to 15-minutes post-rTMS stimulation in each session
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Examine the effect of rTMS stimulation on impulsivity as measured by the Stop Signal Task.
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Change from pre- to 15-minutes post-rTMS stimulation in each session
|
Pain Sensitivity
Time Frame: Change from pre- to 50-minutes post-rTMS stimulation in each session
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Examine the effect of rTMS stimulation on pain sensitivity as measured by thermal quantitative sensory threshold (QST) testing.
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Change from pre- to 50-minutes post-rTMS stimulation in each session
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Delay Discounting Task (cognitive control)
Time Frame: Change from pre- to 10-minutes post-rTMS stimulation in each session
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Examine the effect of rTMS stimulation on cognitive control as measured by the brief (2-min) monetary delay discounting task
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Change from pre- to 10-minutes post-rTMS stimulation in each session
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Secondary Outcome Measures
Outcome Measure |
Measure Description |
Time Frame |
---|---|---|
Effort Choice Task (motivation)
Time Frame: Change from pre- to 30-minutes post-rTMS stimulation in each session
|
Examine the effect of rTMS stimulation on behavioral responding as measured by the Effort Choice Task (number of responses on progressive ratio vs. fixed ratio schedules of reinforcement).
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Change from pre- to 30-minutes post-rTMS stimulation in each session
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Mood
Time Frame: Change from pre- to 5-minutes post-rTMS stimulation in each session
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Examine the effect of rTMS stimulation on mood state as measured by the Positive and Negative Affect Schedule.
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Change from pre- to 5-minutes post-rTMS stimulation in each session
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Peripheral Biomarkers
Time Frame: Change from pre- to 0-minutes post-rTMS stimulation in each session
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Examine the effect of rTMS stimulation on peripheral biomarkers as measured by the plasma concentrations (ng/ml) of brain derived neurotrophic factor (BDNF) and prolactin.
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Change from pre- to 0-minutes post-rTMS stimulation in each session
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Monetary Incentive Delay Task (motivation)
Time Frame: Change from pre- to 40-minutes post-rTMS stimulation in each session
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Examine the effect of rTMS stimulation on behavioral responding as measured by the Monetary Incentive Delay Task
|
Change from pre- to 40-minutes post-rTMS stimulation in each session
|
Collaborators and Investigators
Sponsor
Investigators
- Principal Investigator: Mark K Greenwald, PhD, Wayne State University
Study record dates
Study Major Dates
Study Start (Actual)
Primary Completion (Actual)
Study Completion (Actual)
Study Registration Dates
First Submitted
First Submitted That Met QC Criteria
First Posted (Actual)
Study Record Updates
Last Update Posted (Actual)
Last Update Submitted That Met QC Criteria
Last Verified
More Information
Terms related to this study
Other Study ID Numbers
- TPD-1
Plan for Individual participant data (IPD)
Plan to Share Individual Participant Data (IPD)?
IPD Plan Description
IPD Sharing Time Frame
IPD Sharing Access Criteria
IPD Sharing Supporting Information Type
- CSR
Drug and device information, study documents
Studies a U.S. FDA-regulated drug product
Studies a U.S. FDA-regulated device product
product manufactured in and exported from the U.S.
This information was retrieved directly from the website clinicaltrials.gov without any changes. If you have any requests to change, remove or update your study details, please contact register@clinicaltrials.gov. As soon as a change is implemented on clinicaltrials.gov, this will be updated automatically on our website as well.
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