Identify the Optimal TMS Pulse Protocol to Modulate Reward Activity

November 14, 2025 updated by: Travis Baker, PhD, Rutgers, The State University of New Jersey

Determining the Optimal Pulse Protocol for TMS Induced Change in Reward Positivity

The primary goal will be to identify the optimal pulse protocol by systematically measuring the efficacy of various theta burst stimulation and repetitive rTMS protocols to increase and decrease the reward positivity in dependent smokers. The secondary objective will be to measure the protocols' effectiveness to increase decision-making capacity using the probabilistic selection task (PST). The third objective will be to specifically assess whether the TMS targets has a differential impact on state levels of craving relative to baseline (Tobacco Craving Questionnaire [TCQ]. The investigators plan to accomplish these three objectives using a randomized, controlled experiment involving 2 sessions.

Study Overview

Status

Status

Indicates the current recruitment status or the expanded access status.
Recruiting

Conditions

Conditions

The disease, disorder, syndrome, illness, or injury that is being studied. On ClinicalTrials.gov, conditions may also include other health-related issues, such as lifespan, quality of life, and health risks.

Intervention / Treatment

Intervention / Treatment

A process or action that is the focus of a clinical study. Interventions include drugs, medical devices, procedures, vaccines, and other products that are either investigational or already available. Interventions can also include noninvasive approaches, such as education or modifying diet and exercise.

Detailed Description

The design is primarily a randomized control-trial design (2 sessions), comparing the effects excitatory and inhibitory TMS protocols applied to a prefrontal TMS target on reward processing in smokers. Eligible smokers will be invited to attend two experimental sessions over a 1-month period, and asked to abstain from smoking 4 hrs prior to each session. For Sessions A and B, participants will be asked to provide their consent, CO levels and complete the TCQ. Compliance with the 4-hour abstinence period will be defined as breath CO less than 13 ppm. Participants will then be randomly selected to participate in Condition 1a or Condition 1b. All procedures between the two conditions will be identical except for the contrasting TMS protocols (Condition 1a: excitatory protocols, Condition 1b: inhibitory protocols) and the rewards presented in the T-maze task (Condition 1a: monetary rewards, Condition 1b: monetary rewards with cigarette cues). To streamline these studies, the left DLPFC target will be based on conventional DLPFC targeting methods (electrode position F3). For Condition 1a, the protocol administered in Session A and B will be randomized so that participants will either receive 3600 pulses of 10-Hz TMS or 3600 pulses of cTBS. For each session, participants will first engage in one block of T-maze trials (100 trials: Baseline measure). In Condition 1a, participants are told that the reward stimulus indicated 5 cents and that the presentation of the no-reward stimulus indicated the alley was empty (0 cents). Following this block of trials, participants will either receive 10-Hz TMS or cTBS over the predefined DLPFC target (F3), and then asked to complete 3 additional Blocks of the T-maze (300 trials: post-TMS). Immediately after participants complete the T-maze, subjects will be asked to complete the PST and TCQ. At the end of the Session A, participants will complete Session B on a separate day (all procedures identical as Session A). Session A and Session B will be separated by at least 2 days to minimize carryover effects. For Condition 1b, the protocol administered in Session A and B will be randomized so that participants will either receive 600 or 1200 pulses of iTBS. For each session, participants will first engage in one block of T-maze trials (100 trials: Baseline). In Condition 1b, participants are told that the reward stimulus indicated 5 cents and that the presentation of the no-reward stimulus indicated the alley was empty (0 cents). Each reward and no-reward stimulus will be paired with a cigarette cue. Following this block of trials, participants will either receive 600 or 1200 pulses of iTBS over the predefined DLPFC target (electrode F3), and then asked to complete 3 additional Blocks of the T-maze (300 trials: Post-TMS). Immediately after participants complete the T-maze, subjects will be asked to complete the PST and the TCQ. At the end of the Session A, participants will complete Session B on a separate day (all procedures identical as Session A). Session A and Session B will be separated by at least 2 days to minimize carryover effects.

Study Type

Study Type

Describes the nature of a clinical study. Study types include interventional studies (also called clinical trials), observational studies (including patient registries), and expanded access.
Interventional

Enrollment (Estimated)

Enrollment

The number of participants in a clinical study. The "anticipated" enrollment is the target number of participants that the researchers need for the study.
42

Phase

Phase

The stage of a clinical trial studying a drug or biological product, based on definitions developed by the U.S. Food and Drug Administration (FDA). The phase is based on the study's objective, the number of participants, and other characteristics. There are five phases: Early Phase 1 (formerly listed as Phase 0), Phase 1, Phase 2, Phase 3, and Phase 4. Not Applicable is used to describe trials without FDA-defined phases, including trials of devices or behavioral interventions.
  • 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

Study Contact

The name and contact information for the person who can answer enrollment questions for a clinical study. Each location where the study is being conducted may also have a specific contact, who may be better able to answer those questions.

Study Contact Backup

Study Locations

  • United States
    • New Jersey
      • Newark, New Jersey, United States, 07102
        • Recruiting
        • Rutgers University - Newark
        • Contact:

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

Eligibility Criteria

The key requirements that people who want to participate in a clinical study must meet or the characteristics they must have. Eligibility criteria consist of both inclusion criteria (which are required for a person to participate in the study) and exclusion criteria (which prevent a person from participating). Types of eligibility criteria include whether a study accepts healthy volunteers, has age or age group requirements, or is limited by sex.

Ages Eligible for Study

  • Adult

Accepts Healthy Volunteers

No

Description

Inclusion Criteria:

  1. Nicotine dependent individuals (according to the Alcohol, Smoking and Substance Involvement Screening Test nicotine dependence score).
  2. Be between the ages of 18 and 55 years old.
  3. Not received substance abuse treatment within the previous 30 days.
  4. Be in stable mental and physical health.
  5. If female, test non-pregnant.
  6. No evidence of focal or diffuse brain lesion on MRI.
  7. Be willing to provide informed consent.
  8. Be able to comply with protocol requirements and likely to complete all study procedures.

Exclusion Criteria:

  1. Contraindication to MRI (e.g., presence of metal in the skull, orbits or intracranial cavity, claustrophobia).
  2. Contraindication to rTMS (history of neurological disorder or seizure, increased intracranial pressure, brain surgery, or head trauma with loss of consciousness for > 15 minutes, implanted electronic device, metal in the head, or pregnancy).
  3. History of autoimmune, endocrine, viral, or vascular disorder affecting the brain.
  4. History or MRI evidence of neurological disorder that would lead to local or diffuse brain lesions or significant physical impairment.
  5. Life time history of mental disorders such as: Bipolar Affective disorder (BPAD), Schizophrenia, Post-traumatic Stress disorder (PTSD) or Dementia or Major Depression.
  6. uninterruptable central nervous system medication

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: Treatment
  • Allocation: Randomized
  • Interventional Model: Parallel Assignment
  • Masking: Single

Arms and Interventions

Participant Group / Arm

Participant Group / Arm

A group or subgroup of participants in a clinical trial that receives a specific intervention/treatment, or no intervention, according to the trial's protocol.
Intervention / Treatment

Intervention / Treatment

A process or action that is the focus of a clinical study. Interventions include drugs, medical devices, procedures, vaccines, and other products that are either investigational or already available. Interventions can also include noninvasive approaches, such as education or modifying diet and exercise.
Experimental: Excitatory TMS
For condition 1a, 3600 pulses of 10-Hz TMS or 3600 pulses of cTBS. 10 Hz rTMS (110% RMT stimulation intensity; 10 Hz frequency; 5 s on and 26 s off; 3600 pulses per session; total duration of 40 min). cTBS (80% RMT, (3 pulses at 50 Hz with a repeated frequency of 5 Hz, 200 ms intervals, containing 1800 pulses, 60 second break, 1800 pulses; total duration of 5 minutes).
Device: Transcranial Magnetic Stimulation
TMS will be delivered using a robotic neuronavigation system (Smartmove, ANT). Stimulation intensity will be standardized. Stimulation will be delivered to the L-DLPFC using a active/placebo figure-8 coil and a magventure TMS device.
Experimental: Inhibitory TMS
For condition 1b, 600 or 1200 pulses of iTBS. iTBS will be administered at 80% of each participant's RMT in a burst-firing pattern (3 pulses at 50 Hz) for a 2 s train, followed by an 8 s period of rest. Across sessions, participants will receive one of two iTBS protocols (randomized): 600 pulses (190 s) or 1200 pulses (570 s).
Device: Transcranial Magnetic Stimulation
TMS will be delivered using a robotic neuronavigation system (Smartmove, ANT). Stimulation intensity will be standardized. Stimulation will be delivered to the L-DLPFC using a active/placebo figure-8 coil and a magventure TMS device.

What is the study measuring?

Primary Outcome Measures

Primary Outcome Measures

In a clinical study's protocol, the planned outcome measure that is the most important for evaluating the effect of an intervention/treatment. Most clinical studies have one primary outcome measure, but some have more than one.
Outcome Measure
Measure Description
Time Frame
Event-related Brain Potential: Reward Positivity
Time Frame: Day 0 (day of testing)
The reward positivity is an event-related brain potential (ERP) sensitive to reward feedback. The reward positivity will be measured during the T-maze task, where participants will receive feedback (Reward, No-reward) following choices. ERPs will be created for each electrode and participant by averaging the single-trial EEG according to feedback type (Reward, No-reward). The reward positivity will be evaluated by subtracting the Reward feedback ERPs from the corresponding No-reward feedback ERPs. The size of the reward positivity will then be determined by identifying the maximum absolute amplitude of the difference wave within a 200-to 400-msec window after feedback onset and evaluated along electrodes Fz, FCz, and Cz. The reward positivity will be measured for each pulse protocol across condition 1a and condition 1b of dependent smokers. The reward positivity will be used to measure the efficacy of the pulse protocol to modulate reward activity.
Day 0 (day of testing)

Secondary Outcome Measures

Secondary Outcome Measures

In a clinical study's protocol, a planned outcome measure that is not as important as the primary outcome measure for evaluating the effect of an intervention but is still of interest. Most clinical studies have more than one secondary outcome measure.
Outcome Measure
Measure Description
Time Frame
Approach Learning
Time Frame: Day 0 (day of testing)
Approach learning will be measured using a Probabilistic Selection task (PST), in which subjects are shown pairs of arbitrary stimuli and must learn by trial-and-error to select one of each pair. During an initial learning phase participants are exposed to three pairs of stimuli, each of the three pairs is rewarded on 80%, 70%, and 60% of the trials. Subjects learn by feedback that some stimuli are associated with more positive feedback (Approach) and that some stimuli are associated with more negative feedback (Avoidance). To determine whether subjects learn more from positive (approach) or negative (avoidance) feedback, during a subsequent testing phase they are required to choose between novel stimulus pairs. Approach learning (accuracy and reaction time) for each proposed pulse protocol across condition 1a and 1b will be measured during the testing phase. Avoidance learning performance will be used to measure the efficacy of the pulse protocol to modulate decision making.
Day 0 (day of testing)

Other Outcome Measures

Other Outcome Measures

For clinical trials, a planned measurement described in the protocol that is used to determine the effect of an intervention/treatment on participants. For observational studies, a measurement or observation that is used to describe patterns of diseases or traits, or associations with exposures, risk factors, or treatment. Types of outcome measures include primary outcome measure and secondary outcome measure.
Outcome Measure
Measure Description
Time Frame
Nicotine Craving
Time Frame: Day 0 (day of testing - before and after TMS)
The level of craving will be assessed in dependent smokers using the short version of the Tobacco Craving Questionnaire (TCQ), a 12-item scale that assesses state levels of craving. TCQ will be measured at the start of each session, and following each TMS protocol (once for each pulse protocol). The investigators will compared the TCQ score from pre-TMS (start of session) to post-TMS.
Day 0 (day of testing - before and after TMS)

Collaborators and Investigators

This is where you will find people and organizations involved with this study.

Sponsor

Sponsor

The organization or person who initiates the study and who has authority and control over the study.
Rutgers, The State University of New Jersey

Investigators

Investigators

A researcher involved in a clinical study. Related terms include site principal investigator, site sub-investigator, study chair, study director, and study principal investigator.
  • Principal Investigator: Travis E Baker, PhD, Rutgers University

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)

Study Start

The actual date on which the first participant was enrolled in a clinical study. The "anticipated" study start date is the date that the researchers think will be the study start date.
August 1, 2024

Primary Completion (Estimated)

Primary Completion

The date on which the last participant in a clinical study was examined or received an intervention to collect final data for the primary outcome measure. Whether the clinical study ended according to the protocol or was terminated does not affect this date. For clinical studies with more than one primary outcome measure with different completion dates, this term refers to the date on which data collection is completed for all the primary outcome measures. The "anticipated" primary completion date is the date that the researchers think will be the primary completion date for the study.
August 31, 2026

Study Completion (Estimated)

Study Completion

The date on which the last participant in a clinical study was examined or received an intervention/treatment to collect final data for the primary outcome measures, secondary outcome measures, and adverse events (that is, the last participant's last visit). The "anticipated" study completion date is the date that the researchers think will be the study completion date.
August 31, 2026

Study Registration Dates

First Submitted

First Submitted

The date on which the study sponsor or investigator first submitted a study record to ClinicalTrials.gov. There is typically a delay of a few days between the first submitted date and the record's availability on ClinicalTrials.gov (the first posted date).
November 15, 2024

First Submitted That Met QC Criteria

First Submitted That Met QC Criteria

The date on which the study sponsor or investigator first submits a study record that is consistent with National Library of Medicine (NLM) quality control (QC) review criteria. The sponsor or investigator may need to revise and submit a study record one or more times before NLM's QC review criteria are met. It is the responsibility of the sponsor or investigator to ensure that the study record is consistent with the NLM QC review criteria.
November 15, 2024

First Posted (Actual)

First Posted

The date on which the study record was first available on ClinicalTrials.gov after National Library of Medicine (NLM) quality control (QC) review has concluded. There is typically a delay of a few days between the date the study sponsor or investigator submitted the study record and the first posted date.
November 19, 2024

Study Record Updates

Last Update Posted (Actual)

Last Update Posted

The most recent date on which changes to a study record were made available on ClinicalTrials.gov. There may be a delay between when the changes were submitted to ClinicalTrials.gov by the study's sponsor or investigator (the last update submitted date) and the last update posted date.
November 18, 2025

Last Update Submitted That Met QC Criteria

Last Update Submitted That Met QC Criteria

The most recent date on which the study sponsor or investigator submitted changes to a study record that are consistent with National Library of Medicine (NLM) quality control (QC) review criteria. It is the responsibility of the sponsor or investigator to ensure that the study record is consistent with the NLM QC review criteria.
November 14, 2025

Last Verified

Last Verified

The most recent date on which the study sponsor or investigator confirmed the information about a clinical study on ClinicalTrials.gov as accurate and current. If a study with a recruitment status of recruiting; not yet recruiting; or active, not recruiting has not been confirmed within the past 2 years, the study's recruitment status is shown as unknown.
November 1, 2025

More Information

Terms related to this study

Keywords

Additional Relevant MeSH Terms

Other Study ID Numbers

Other Study ID Numbers

Identifiers or ID numbers other than the NCT number that are assigned to a clinical study by the study's sponsor, funders, or others. These numbers may include unique identifiers from other trial registries and National Institutes of Health grant numbers.
  • Pro2022000444_TBSrTMS

Plan for Individual participant data (IPD)

Plan to Share Individual Participant Data (IPD)?

NO

IPD Plan Description

Data may be uploaded to an open source framework. All data will be deidentified.

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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