- ICH GCP
- US Clinical Trials Registry
- Clinical Trial NCT05416138
Theta Phase-specific TMS to Modulate Prefrontal Activity
July 17, 2023 updated by: University of Minnesota
The Effects of Closed-loop TMS-EEG on Immediate Prefrontal Activity and Approach/Avoidance Behavior
The purpose of this study is to evaluate the causal link between the phase of ongoing theta oscillations in the prefrontal cortex and approach/avoidance (Ap/Av) behavior in adults using theta phase-specific transcranial magnetic stimulation (TMS).
Study Overview
Status
Recruiting
Conditions
Intervention / Treatment
Detailed Description
Approach/avoidance (Ap/Av) behavior is a reliable marker of the emotional processes in the human brain and a robust predictor of mood disorders.
Although existing scientific studies found a correlation between the approach/avoidance behavior and ongoing theta activity (3-7 Hz) in the left dorsolateral prefrontal cortex, the causal evidence of the phase-dependent role and strength of association between the prefrontal theta oscillations and approach/avoidance behavior are still unclear.
Here, we will monitor brain oscillations in real-time non-invasively using electroencephalography during the approach/avoidance test and modulate theta peaks or troughs with transcranial magnetic stimulation.
These data will provide novel understanding of the mechanisms of emotional processing in human brain.
Study Type
Interventional
Enrollment (Estimated)
26
Phase
- Not Applicable
Contacts and Locations
This section provides the contact details for those conducting the study, and information on where this study is being conducted.
Study Contact
- Name: Alexander Opitz, PhD
- Phone Number: 612-624-1118
- Email: aopitz@umn.edu
Study Contact Backup
- Name: Ivan Alekseichuk, PhD
- Phone Number: 612-624-1118
- Email: ialeksei@umn.edu
Study Locations
-
-
Minnesota
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Minneapolis, Minnesota, United States, 55455
- Recruiting
- University of Minnesota
-
Contact:
- Alexander Opitz, PhD
- Phone Number: 612-624-1118
- Email: aopitz@umn.edu
-
Contact:
- Ivan Alekseichuk, PhD
- Phone Number: 612-624-1118
- Email: ialeksei@umn.edu
-
Principal Investigator:
- Alexander Opitz, PhD
-
Sub-Investigator:
- Ivan Alekseichuk, PhD
-
-
Participation Criteria
Researchers look for people who fit a certain description, called eligibility criteria. Some examples of these criteria are a person's general health condition or prior treatments.
Eligibility Criteria
Ages Eligible for Study
16 years to 63 years (Adult, Older Adult)
Accepts Healthy Volunteers
Yes
Description
Inclusion Criteria:
- Age between 18 and 65 years old.
- Confident level of English language.
Exclusion Criteria:
- Chronic condition that requires pharmacological treatment over the course of study participation.
- Metallic or electric implant in the head, neck, or chest area or otherwise MRI-noncompatible implants.
- History or evidence of seizures, head injuries with loss of consciousness, chronic neurological or mental disorder.
- Pregnancy or breast-feeding.
- History or evidence of alcohol or drug addiction.
Study Plan
This section provides details of the study plan, including how the study is designed and what the study is measuring.
How is the study designed?
Design Details
- Primary Purpose: Basic Science
- Allocation: Randomized
- Interventional Model: Crossover Assignment
- Masking: Double
Arms and Interventions
Participant Group / Arm |
Intervention / Treatment |
---|---|
Experimental: TMS over the left prefrontal cortex
Transcranial magnetic stimulation (TMS) will be administrated with a figure-8 coil over the left dorsolateral prefrontal cortex (DLPFC) at the intensity of up to 120% of the individualized resting motor threshold (rMT).
Stimulation will be performed during and for the duration of the cognitive test.
Up to three TMS pulses will be delivered at the beginning of every test trial (each trial duration is 2-6 seconds).
The total duration of the cognitive testing and stimulation per session is approximately 40 minutes (in 4 blocks with breaks in-between).
|
TMS will be performed at either peaks or troughs of ongoing prefrontal theta oscillations (3-7 Hz) concurrently with the cognitive test at the beginning of every test trial.
Theta oscillations will be monitored in real-time at the left dorsolateral prefrontal cortex using electroencephalography (EEG).
|
Sham Comparator: TMS over the head vertex
Transcranial magnetic stimulation (TMS) will be administrated with a figure-8 coil over the head vertex at the intensity of up to 120% of the individualized resting motor threshold (rMT).
Stimulation will be performed during and for the duration of the cognitive test.
Up to three TMS pulses will be delivered at the beginning of every test trial (each trial duration is 2-6 seconds).
The total duration of the cognitive testing per session is approximately 40 minutes (in 4 blocks with breaks in-between).
|
TMS will be performed at either peaks or troughs of ongoing prefrontal theta oscillations (3-7 Hz) concurrently with the cognitive test at the beginning of every test trial.
Theta oscillations will be monitored in real-time at the left dorsolateral prefrontal cortex using electroencephalography (EEG).
|
What is the study measuring?
Primary Outcome Measures
Outcome Measure |
Measure Description |
Time Frame |
---|---|---|
Reaction times in the Approach/Avoidance test
Time Frame: Immediate effect during stimulation
|
Reaction times (in milliseconds) in the Approach/Avoidance test during transcranial magnetic stimulation (TMS) at the peak vs. trough phases of ongoing prefrontal theta activity.
|
Immediate effect during stimulation
|
Secondary Outcome Measures
Outcome Measure |
Measure Description |
Time Frame |
---|---|---|
Amplitude of TMS evoked potentials
Time Frame: Immediate effect during stimulation
|
Amplitude of transcranial magnetic stimulation (TMS)-evoked potentials (in microvolts) in ongoing electroencephalography (EEG) in the left prefrontal cortex during the stimulation at the peak vs. trough phases of ongoing prefrontal theta activity.
|
Immediate effect during stimulation
|
Collaborators and Investigators
This is where you will find people and organizations involved with this study.
Sponsor
Collaborators
Investigators
- Principal Investigator: Alexander Opitz, PhD, University of Minnesota
Study record dates
These dates track the progress of study record and summary results submissions to ClinicalTrials.gov. Study records and reported results are reviewed by the National Library of Medicine (NLM) to make sure they meet specific quality control standards before being posted on the public website.
Study Major Dates
Study Start (Actual)
November 1, 2022
Primary Completion (Estimated)
August 31, 2024
Study Completion (Estimated)
August 31, 2024
Study Registration Dates
First Submitted
June 8, 2022
First Submitted That Met QC Criteria
June 8, 2022
First Posted (Actual)
June 13, 2022
Study Record Updates
Last Update Posted (Actual)
July 18, 2023
Last Update Submitted That Met QC Criteria
July 17, 2023
Last Verified
July 1, 2023
More Information
Terms related to this study
Other Study ID Numbers
- STUDY00016214
Plan for Individual participant data (IPD)
Plan to Share Individual Participant Data (IPD)?
YES
IPD Plan Description
Full or partial access to the preprocessed data will be provided upon the request to the faculty / research staff of recognized research, medical, and educational institutions for educational and scientific purposes.
The request should be sent via an institutional email and will be stored with the study materials.
The request should include a short description of the scientific or educational aims.
IPD Sharing Time Frame
Data will be shared only upon request after the study has ended (within 6 months).
IPD Sharing Access Criteria
To receive access, the study investigators need to be contacted via an institutional e-mail including a short description of the scientific or educational aims.
Drug and device information, study documents
Studies a U.S. FDA-regulated drug product
No
Studies a U.S. FDA-regulated device product
Yes
product manufactured in and exported from the U.S.
No
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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