NCT03687892

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

57
Monitor

Trial Health Score

Automated assessment based on enrollment pace, timeline, and geographic reach

Enrollment
37

participants targeted

Target at P50-P75 for not_applicable healthy-volunteers

Timeline
Completed

Started Apr 2019

Longer than P75 for not_applicable healthy-volunteers

Geographic Reach
1 country

1 active site

Status
terminated

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

Completed
1.9 years until next milestone

First Posted

Study publicly available on registry

September 27, 2018

Completed
6 months until next milestone

Study Start

First participant enrolled

April 1, 2019

Completed
3.6 years until next milestone

Primary Completion

Last participant's last visit for primary outcome

October 22, 2022

Completed
Same day until next milestone

Study Completion

Last participant's last visit for all outcomes

October 22, 2022

Completed
1 year until next milestone

Results Posted

Study results publicly available

November 9, 2023

Completed
Last Updated

November 9, 2023

Status Verified

October 1, 2023

Enrollment Period

3.6 years

First QC Date

November 8, 2016

Results QC Date

October 20, 2023

Last Update Submit

October 20, 2023

Conditions

Keywords

repetitive Transcranial Magnetic Stimulationfunctional MRITheta Burst Stimulation

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

EXPERIMENTAL

The 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.

Device: continuous Theta Burst Stimulation

intermittent Theta Burst Stimulation

EXPERIMENTAL

The 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.

Device: intermittent Theta Burst Stimulation

Interventions

Continuous Theta Burst Simulation will be applied in a continuous manner resulting in cortical excitability.

Also known as: cTBS
continuous Theta Burst Stimulation

Intermittent Theta Burst Stimulation will be applied in an intermittent manner resulting in cortical inhibition.

Also known as: iTBS
intermittent Theta Burst Stimulation

Eligibility Criteria

Age18 Years+
Sexall
Healthy VolunteersYes
Age GroupsAdult (18-64), Older Adult (65+)

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

Location

Related Publications (38)

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Results Point of Contact

Title
Principal Investigator
Organization
Stanford University

Study Officials

  • Nolan Williams, M.D.

    Stanford University

    PRINCIPAL INVESTIGATOR

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

Locations