Examining the Effects of Neural Stimulation on Inhibitory Control and Cigarette Smoking

University of Missouri-Columbia63 enrolled

Overview

The purpose of this research study is to examine the effects of theta-burst Transcranial Magnetic Stimulation on inhibitory control and smoking among adult cigarette smokers.

Study Type

INTERVENTIONAL

Allocation

RANDOMIZED

Purpose

BASIC_SCIENCE

Masking

DOUBLE

Enrollment

Conditions

Tobacco Use Disorder

Interventions

Intermittent Theta-burst stimulation (iTBS)DEVICE

Theta-burst stimulation (TBS), a form of repetitive transcranial magnetic stimulation (rTMS), affects brain areas stimulated directly underneath the scalp and brain areas that are functionally connected. Theta-burst stimulation (TBS), a form of repetitive transcranial magnetic stimulation (rTMS), affects brain areas stimulated directly underneath the scalp and brain areas that are functionally connected.

Continuous Theta-burst stimulation (cTBS)DEVICE

Theta-burst stimulation (TBS), a form of repetitive transcranial magnetic stimulation (rTMS), affects brain areas stimulated directly underneath the scalp and brain areas that are functionally connected. Continuous TBS (cTBS) which is thought to temporarily dampen brain activity in that specific area.

Eligibility

Sex: ALLMin age: 18 YearsMax age: 65 YearsHealthy volunteers:

Medical Language ↔ Plain English

Inclusion Criteria: 1. Be between the ages of 18 and 65. 2. Be in stable mental and physical health. 3. Be willing to provide informed consent. 4. Be able to comply with protocol requirements and likely to complete all study procedures. 5. Be a current nicotine dependent cigarette smoker (smoke ≥10 cigs/day) with a minimum smoking history of smoking an average of ≥ 10 cigs/day over the past two years. Exclusion Criteria: * 1\. Contraindication to MRI (e.g., presence of metal in the skull, orbits or intracranial cavity, claustrophobia). 2\. Contraindication to TMS (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, as indicated by a positive urine pregnancy test at screening). 3\. Any use of substances that lower seizure threshold (such as thyroid medications or cocaine). 4\. History of autoimmune, endocrine, viral, or vascular disorder affecting the brain. 5\. History or MRI evidence of neurological disorder that would lead to local or diffuse brain lesions or significant physical impairment. 6\. Unstable cardiac disease, uncontrolled hypertension, severe renal or liver insufficiency, or sleep apnea. 7\. BAC greater than 0.0. 8. Any other condition or concern that in the Investigator's opinion would impact participant safety, compliance with study instructions, or potentially confound the interpretation of the study results.

Locations (1)

University of Missouri - Columbia

Columbia, Missouri, United States

Outcomes

Primary Outcomes

The Effects of cTBS vs. iTBS TMS Applied to the r.IFG on Change in Behavioral Inhibition Between Baseline and 1 Hour Post Treatment.

Changes in errors of omission on an inhibitory control task performed prior to and immediately after cTBS, and changes in errors of omission on an inhibitory control task performed prior to and immediately after iTBS. Outcomes will be measured as the mean change in behavioral performance percent correct on inhibition trials between baseline and 1 hour post treatment. Scores on the inhibitory control task range from 0% correct to 100% correct, and the change from pre-post TBS is expressed as a percent increase or decrease in performance. Positive values represent an improved outcome, whereas negative values represent a worse outcome.

Time frame: 1 hour

The Effects of cTBS vs. iTBS TMS Applied to the r.IFG on Changes in Craving to Smoke 1 Hour Post Treatment.

Changes in self-reported craving to smoke will be assessed using the Questionnaire on Smoking Urges brief (QSUb) at 1 hour post session on each of three conditions (Baseline, cTBS, iTBS). The values are calculated as the mean of the scores between conditions at 1 hour post session. Scores on the QSUb range from 10 to 70. The lower the score, the better the outcome.

Time frame: 1 hour

The Effects of cTBS vs. iTBS TMS Applied to the r.IFG on Changes in Craving to Smoke 24hrs Post Treatment Between Conditions.

Changes in self-reported craving to smoke will be assessed using the Questionnaire on Smoking Urges brief (QSUb) at 24hrs post session on each of three conditions (Baseline, cTBS, iTBS). The values are calculated as the mean of the scores between conditions at 24 hours post session. Scores on the QSUb range from 10 to 70. The lower the score, the better the outcome.

Time frame: 24 hours

The Effects of cTBS vs. iTBS TMS Applied to the r.IFG on Changes in Craving to Smoke 48hrs Post Treatment Between Conditions.

Changes in self-reported craving to smoke will be assessed using the Questionnaire on Smoking Urges brief (QSUb) at 48hrs post session on each of three conditions (Baseline, cTBS, iTBS). The values are calculated as the mean of the scores between conditions at 48 hours post session. Scores on the QSUb range from 10 to 70. The lower the score, the better the outcome.

Data from ClinicalTrials.gov

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