Study Stopped
Change in study personnel.
Establishing Functional Biomarkers for Spaced Theta-Burst Stimulation
1 other identifier
interventional
37
1 country
1
Brief Summary
The investigators plan to use functional magnetic resonance imaging (fMRI) methods to assess brain changes following spaced theta burst stimulation (TBS), a new form of repetitive transcranial magnetic stimulation (rTMS), in 10 healthy participants. The investigators will measure the effects of both excitatory (intermittent, iTBS) and inhibitory (continuous, cTBS) TBS applied to the motor cortex, a system that when stimulated produces a readily observable behavioral response (e.g., movement of a given body regions). In addition to brain activity, we will assess the effects of TBS on motor responses and pain perception. The goal is to determine how brain activity and blood flow during tasks and at rest change following the applications of spaced cTBS and iTBS. Additionally, the aim is to determine the duration of the spaced TBS effects on brain activity and behavior. This study will provide an understanding of the functional brain and behavioral changes that occur following spaced TBS to the motor cortex and has implications for reducing the long treatment schedules associated with classical rTMS protocols.
Trial Health
Trial Health Score
Automated assessment based on enrollment pace, timeline, and geographic reach
participants targeted
Target at P50-P75 for not_applicable healthy-volunteers
Started Apr 2019
Longer than P75 for not_applicable healthy-volunteers
1 active site
Health score is calculated from publicly available data and should be used for screening purposes only.
Trial Relationships
Click on a node to explore related trials.
Study Timeline
Key milestones and dates
First Submitted
Initial submission to the registry
November 8, 2016
CompletedFirst Posted
Study publicly available on registry
September 27, 2018
CompletedStudy Start
First participant enrolled
April 1, 2019
CompletedPrimary Completion
Last participant's last visit for primary outcome
October 22, 2022
CompletedStudy Completion
Last participant's last visit for all outcomes
October 22, 2022
CompletedResults Posted
Study results publicly available
November 9, 2023
CompletedNovember 9, 2023
October 1, 2023
3.6 years
November 8, 2016
October 20, 2023
October 20, 2023
Conditions
Keywords
Outcome Measures
Primary Outcomes (1)
Changes in Motor Evoked Potential
To determine the duration of effect of an application of a spaced TBS stimulation session (both inhibitory, cTBS and excitatory, iTBS) as measured by duration of change in motor evoked potential.
Prior to and and immediately after TBS sessions on each day (separated by 3+ days)
Secondary Outcomes (3)
Change From Baseline Resting-state Functional Connectivity Between the M1 Hotspot and Other Motor Areas Immediately Post-TBS
Prior to and and immediately after TBS sessions on each day (separated by 3+ days)
Change From Baseline Motor Cortex Activity as Assessed by the BOLD Signal Immediately Post-TBS
Prior to and and immediately after TBS sessions on each day (separated by 3+ days)
Changes in Arterial Perfusion
Prior to and and immediately after TBS sessions on each day (separated by 3+ days)
Study Arms (2)
continuous Theta Burst Stimulation
EXPERIMENTALThe investigators will perform two applications of 40s of continuous Theta Burst Stimulation (cTBS) form of rTMS at 80% resting motor threshold (previously determined), with a 15 minute intersession interval. The standardized treatment location for the left motor cortex will be determined by Localite Neuronavigation. The baseline structural scan obtained during the scan 1 will be utilized for this localization process.
intermittent Theta Burst Stimulation
EXPERIMENTALThe investigators will perform two applications of 40s of intermittent Theta Burst Stimulation (iTBS) form of rTMS at 80% resting motor threshold (previously determined), with a 15 minute intersession interval. The standardized treatment location for the left motor cortex will be determined by Localite Neuronavigation. The baseline structural scan obtained during the scan 1 will be utilized for this localization process.
Interventions
Continuous Theta Burst Simulation will be applied in a continuous manner resulting in cortical excitability.
Intermittent Theta Burst Stimulation will be applied in an intermittent manner resulting in cortical inhibition.
Eligibility Criteria
You may qualify if:
- Age 18 or older
- Right-handed
- Agree to having fMRI scan
- Willingness to suspend use of analgesic drugs or cough suppressants for 24 hours prior to the scans
- Proficiency in English sufficient to complete questionnaires/follow instructions during fMRI assessments
- US Citizen or resident able to receive payment legally
You may not qualify if:
- A medical condition that would contraindicate the use of rTMS
- Any condition that would contraindicate MRI (like ferromagnetic metal in the body)
- Pregnancy or breast feeding
- Any significant neurologic disease, including dementia, multi-infarct dementia, Parkinson's or Huntington's disease, brain tumor, progressive supranuclear palsy, seizure disorder, subdural hematoma, multiple sclerosis, history of significant head trauma
- Current antidepressant use (must be washed out for two weeks prior to starting protocol)
- Inability to stop taking medication contraindicated with treatment
Contact the study team to confirm eligibility.
Sponsors & Collaborators
Study Sites (1)
Stanford University
Palo Alto, California, 94305, United States
Related Publications (38)
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PMID: 22160708BACKGROUND
Results Point of Contact
- Title
- Principal Investigator
- Organization
- Stanford University
Study Officials
- PRINCIPAL INVESTIGATOR
Nolan Williams, M.D.
Stanford University
Publication Agreements
- PI is Sponsor Employee
- Yes
Study Design
- Study Type
- interventional
- Phase
- not applicable
- Allocation
- RANDOMIZED
- Masking
- SINGLE
- Who Masked
- PARTICIPANT
- Purpose
- BASIC SCIENCE
- Intervention Model
- CROSSOVER
- Sponsor Type
- OTHER
- Responsible Party
- PRINCIPAL INVESTIGATOR
- PI Title
- Instructor of Psychiatry and Behavioral Sciences
Study Record Dates
First Submitted
November 8, 2016
First Posted
September 27, 2018
Study Start
April 1, 2019
Primary Completion
October 22, 2022
Study Completion
October 22, 2022
Last Updated
November 9, 2023
Results First Posted
November 9, 2023
Record last verified: 2023-10