Trial Outcomes & Findings for tDCS Effects on Resisting Smoking: Dose Ranging Study (NCT NCT02624284)
NCT ID: NCT02624284
Last Updated: 2019-03-19
Results Overview
Participant smoking behavior will be assessed during the laboratory session using a validated smoking lapse paradigm. The primary outcome measure is time to first cigarette in minutes.
Recruitment status
COMPLETED
Study phase
NA
Target enrollment
172 participants
Primary outcome timeframe
During laboratory session on day 5, assessed for up to 2 hours
Results posted on
2019-03-19
Participant Flow
Participant milestones
| Measure |
Sham Dose
Participants in this arm will receive the sham transcranial direct current stimulation (tDCS) procedure. During sham tDCS, a 1.0 mA to 2.0 mA current will be delivered for approximately 30 seconds before being extinguished over a course of seconds. The anodal electrode will be placed over the left F3 and the cathodal electrode over the right supraorbital area.
Sham tDCS: During sham tDCS, a 1.0 mA to 2.0 mA current will be delivered for approximately 30 seconds before being extinguished over a course of seconds. Again, the anodal electrode will be placed over the left F3 and the cathodal electrode over the right supraorbital area. Most participants cannot distinguish between real and sham tDCS.
|
1mA Dose
Participants in this arm will receive the 1mA transcranial direct current stimulation (tDCS) procedure. A neuroConn DC-Stimulator Plus will apply a constant direct current (1.0 mA via 5x7 electrode) to the left dorsal lateral prefrontal cortex. Each participant will receive anodal stimulation for a period of 20 minutes. For anodal stimulation over the left DLPFC, the anodal electrode will be placed over the left F3 and the cathodal electrode over the right supraorbital area (international EEG 10/20 system).
transcranial direct current stimulation (tDCS): Active tDCS: A neuroConn DC-Stimulator Plus will apply a constant direct current (1.0 mA to 2.0 mA via 5x7 electrode) to the left dorsal lateral prefrontal cortex. Each participant will receive anodal stimulation for a period of 20 minutes. For anodal stimulation over the left DLPFC, the anodal electrode will be placed over the left F3 and the cathodal electrode over the right supraorbital area (international EEG 10/20 system).
|
2 mA Dose
Participants in this arm will receive the 2 mA transcranial direct current stimulation (tDCS) procedure. A neuroConn DC-Stimulator Plus will apply a constant direct current (2.0 mA via 5x7 electrode) to the left dorsal lateral prefrontal cortex. Each participant will receive anodal stimulation for a period of 20 minutes. For anodal stimulation over the left DLPFC, the anodal electrode will be placed over the left F3 and the cathodal electrode over the right supraorbital area (international EEG 10/20 system).
transcranial direct current stimulation (tDCS): Active tDCS: A neuroConn DC-Stimulator Plus will apply a constant direct current (1.0 mA to 2.0 mA via 5x7 electrode) to the left dorsal lateral prefrontal cortex. Each participant will receive anodal stimulation for a period of 20 minutes. For anodal stimulation over the left DLPFC, the anodal electrode will be placed over the left F3 and the cathodal electrode over the right supraorbital area (international EEG 10/20 system).
|
|---|---|---|---|
|
Overall Study
STARTED
|
49
|
53
|
47
|
|
Overall Study
COMPLETED
|
35
|
35
|
36
|
|
Overall Study
NOT COMPLETED
|
14
|
18
|
11
|
Reasons for withdrawal
| Measure |
Sham Dose
Participants in this arm will receive the sham transcranial direct current stimulation (tDCS) procedure. During sham tDCS, a 1.0 mA to 2.0 mA current will be delivered for approximately 30 seconds before being extinguished over a course of seconds. The anodal electrode will be placed over the left F3 and the cathodal electrode over the right supraorbital area.
Sham tDCS: During sham tDCS, a 1.0 mA to 2.0 mA current will be delivered for approximately 30 seconds before being extinguished over a course of seconds. Again, the anodal electrode will be placed over the left F3 and the cathodal electrode over the right supraorbital area. Most participants cannot distinguish between real and sham tDCS.
|
1mA Dose
Participants in this arm will receive the 1mA transcranial direct current stimulation (tDCS) procedure. A neuroConn DC-Stimulator Plus will apply a constant direct current (1.0 mA via 5x7 electrode) to the left dorsal lateral prefrontal cortex. Each participant will receive anodal stimulation for a period of 20 minutes. For anodal stimulation over the left DLPFC, the anodal electrode will be placed over the left F3 and the cathodal electrode over the right supraorbital area (international EEG 10/20 system).
transcranial direct current stimulation (tDCS): Active tDCS: A neuroConn DC-Stimulator Plus will apply a constant direct current (1.0 mA to 2.0 mA via 5x7 electrode) to the left dorsal lateral prefrontal cortex. Each participant will receive anodal stimulation for a period of 20 minutes. For anodal stimulation over the left DLPFC, the anodal electrode will be placed over the left F3 and the cathodal electrode over the right supraorbital area (international EEG 10/20 system).
|
2 mA Dose
Participants in this arm will receive the 2 mA transcranial direct current stimulation (tDCS) procedure. A neuroConn DC-Stimulator Plus will apply a constant direct current (2.0 mA via 5x7 electrode) to the left dorsal lateral prefrontal cortex. Each participant will receive anodal stimulation for a period of 20 minutes. For anodal stimulation over the left DLPFC, the anodal electrode will be placed over the left F3 and the cathodal electrode over the right supraorbital area (international EEG 10/20 system).
transcranial direct current stimulation (tDCS): Active tDCS: A neuroConn DC-Stimulator Plus will apply a constant direct current (1.0 mA to 2.0 mA via 5x7 electrode) to the left dorsal lateral prefrontal cortex. Each participant will receive anodal stimulation for a period of 20 minutes. For anodal stimulation over the left DLPFC, the anodal electrode will be placed over the left F3 and the cathodal electrode over the right supraorbital area (international EEG 10/20 system).
|
|---|---|---|---|
|
Overall Study
Withdrawal by Subject
|
3
|
6
|
3
|
|
Overall Study
Protocol Violation
|
9
|
10
|
7
|
|
Overall Study
Revealed exclusionary condition
|
2
|
2
|
0
|
|
Overall Study
Adverse Event
|
0
|
0
|
1
|
Baseline Characteristics
tDCS Effects on Resisting Smoking: Dose Ranging Study
Baseline characteristics by cohort
| Measure |
Sham Dose
n=35 Participants
Participants in this arm will receive the sham transcranial direct current stimulation (tDCS) procedure. During sham tDCS, a 1.0 mA to 2.0 mA current will be delivered for approximately 30 seconds before being extinguished over a course of seconds. The anodal electrode will be placed over the left F3 and the cathodal electrode over the right supraorbital area.
Sham tDCS: During sham tDCS, a 1.0 mA to 2.0 mA current will be delivered for approximately 30 seconds before being extinguished over a course of seconds. Again, the anodal electrode will be placed over the left F3 and the cathodal electrode over the right supraorbital area. Most participants cannot distinguish between real and sham tDCS.
|
1mA Dose
n=35 Participants
Participants in this arm will receive the 1mA transcranial direct current stimulation (tDCS) procedure. A neuroConn DC-Stimulator Plus will apply a constant direct current (1.0 mA via 5x7 electrode) to the left dorsal lateral prefrontal cortex. Each participant will receive anodal stimulation for a period of 20 minutes. For anodal stimulation over the left DLPFC, the anodal electrode will be placed over the left F3 and the cathodal electrode over the right supraorbital area (international EEG 10/20 system).
transcranial direct current stimulation (tDCS): Active tDCS: A neuroConn DC-Stimulator Plus will apply a constant direct current (1.0 mA to 2.0 mA via 5x7 electrode) to the left dorsal lateral prefrontal cortex. Each participant will receive anodal stimulation for a period of 20 minutes. For anodal stimulation over the left DLPFC, the anodal electrode will be placed over the left F3 and the cathodal electrode over the right supraorbital area (international EEG 10/20 system).
|
2 mA Dose
n=36 Participants
Participants in this arm will receive the 2 mA transcranial direct current stimulation (tDCS) procedure. A neuroConn DC-Stimulator Plus will apply a constant direct current (2.0 mA via 5x7 electrode) to the left dorsal lateral prefrontal cortex. Each participant will receive anodal stimulation for a period of 20 minutes. For anodal stimulation over the left DLPFC, the anodal electrode will be placed over the left F3 and the cathodal electrode over the right supraorbital area (international EEG 10/20 system).
transcranial direct current stimulation (tDCS): Active tDCS: A neuroConn DC-Stimulator Plus will apply a constant direct current (1.0 mA to 2.0 mA via 5x7 electrode) to the left dorsal lateral prefrontal cortex. Each participant will receive anodal stimulation for a period of 20 minutes. For anodal stimulation over the left DLPFC, the anodal electrode will be placed over the left F3 and the cathodal electrode over the right supraorbital area (international EEG 10/20 system).
|
Total
n=106 Participants
Total of all reporting groups
|
|---|---|---|---|---|
|
Age, Continuous
|
44.7 years
STANDARD_DEVIATION 11.2 • n=5 Participants
|
45.6 years
STANDARD_DEVIATION 9.4 • n=7 Participants
|
45.4 years
STANDARD_DEVIATION 9.2 • n=5 Participants
|
45.3 years
STANDARD_DEVIATION 9.9 • n=4 Participants
|
|
Sex: Female, Male
Female
|
15 Participants
n=5 Participants
|
13 Participants
n=7 Participants
|
10 Participants
n=5 Participants
|
38 Participants
n=4 Participants
|
|
Sex: Female, Male
Male
|
20 Participants
n=5 Participants
|
22 Participants
n=7 Participants
|
26 Participants
n=5 Participants
|
68 Participants
n=4 Participants
|
|
Race (NIH/OMB)
American Indian or Alaska Native
|
0 Participants
n=5 Participants
|
1 Participants
n=7 Participants
|
0 Participants
n=5 Participants
|
1 Participants
n=4 Participants
|
|
Race (NIH/OMB)
Asian
|
0 Participants
n=5 Participants
|
0 Participants
n=7 Participants
|
1 Participants
n=5 Participants
|
1 Participants
n=4 Participants
|
|
Race (NIH/OMB)
Native Hawaiian or Other Pacific Islander
|
0 Participants
n=5 Participants
|
0 Participants
n=7 Participants
|
0 Participants
n=5 Participants
|
0 Participants
n=4 Participants
|
|
Race (NIH/OMB)
Black or African American
|
24 Participants
n=5 Participants
|
25 Participants
n=7 Participants
|
28 Participants
n=5 Participants
|
77 Participants
n=4 Participants
|
|
Race (NIH/OMB)
White
|
10 Participants
n=5 Participants
|
8 Participants
n=7 Participants
|
7 Participants
n=5 Participants
|
25 Participants
n=4 Participants
|
|
Race (NIH/OMB)
More than one race
|
1 Participants
n=5 Participants
|
1 Participants
n=7 Participants
|
0 Participants
n=5 Participants
|
2 Participants
n=4 Participants
|
|
Race (NIH/OMB)
Unknown or Not Reported
|
0 Participants
n=5 Participants
|
0 Participants
n=7 Participants
|
0 Participants
n=5 Participants
|
0 Participants
n=4 Participants
|
|
Region of Enrollment
United States
|
35 participants
n=5 Participants
|
35 participants
n=7 Participants
|
36 participants
n=5 Participants
|
106 participants
n=4 Participants
|
|
Nicotine dependence (FTND score)
|
5.3 units on a scale
STANDARD_DEVIATION 1.5 • n=5 Participants
|
5.1 units on a scale
STANDARD_DEVIATION 1.6 • n=7 Participants
|
5.1 units on a scale
STANDARD_DEVIATION 1.8 • n=5 Participants
|
5.2 units on a scale
STANDARD_DEVIATION 1.6 • n=4 Participants
|
PRIMARY outcome
Timeframe: During laboratory session on day 5, assessed for up to 2 hoursParticipant smoking behavior will be assessed during the laboratory session using a validated smoking lapse paradigm. The primary outcome measure is time to first cigarette in minutes.
Outcome measures
| Measure |
Sham Dose
n=35 Participants
Participants in this arm will receive the sham transcranial direct current stimulation (tDCS) procedure. During sham tDCS, a 1.0 mA to 2.0 mA current will be delivered for approximately 30 seconds before being extinguished over a course of seconds. The anodal electrode will be placed over the left F3 and the cathodal electrode over the right supraorbital area.
Sham tDCS: During sham tDCS, a 1.0 mA to 2.0 mA current will be delivered for approximately 30 seconds before being extinguished over a course of seconds. Again, the anodal electrode will be placed over the left F3 and the cathodal electrode over the right supraorbital area. Most participants cannot distinguish between real and sham tDCS.
|
1mA Dose
n=35 Participants
Participants in this arm will receive the 1mA transcranial direct current stimulation (tDCS) procedure. A neuroConn DC-Stimulator Plus will apply a constant direct current (1.0 mA via 5x7 electrode) to the left dorsal lateral prefrontal cortex. Each participant will receive anodal stimulation for a period of 20 minutes. For anodal stimulation over the left DLPFC, the anodal electrode will be placed over the left F3 and the cathodal electrode over the right supraorbital area (international EEG 10/20 system).
transcranial direct current stimulation (tDCS): Active tDCS: A neuroConn DC-Stimulator Plus will apply a constant direct current (1.0 mA to 2.0 mA via 5x7 electrode) to the left dorsal lateral prefrontal cortex. Each participant will receive anodal stimulation for a period of 20 minutes. For anodal stimulation over the left DLPFC, the anodal electrode will be placed over the left F3 and the cathodal electrode over the right supraorbital area (international EEG 10/20 system).
|
2 mA Dose
n=36 Participants
Participants in this arm will receive the 2 mA transcranial direct current stimulation (tDCS) procedure. A neuroConn DC-Stimulator Plus will apply a constant direct current (2.0 mA via 5x7 electrode) to the left dorsal lateral prefrontal cortex. Each participant will receive anodal stimulation for a period of 20 minutes. For anodal stimulation over the left DLPFC, the anodal electrode will be placed over the left F3 and the cathodal electrode over the right supraorbital area (international EEG 10/20 system).
transcranial direct current stimulation (tDCS): Active tDCS: A neuroConn DC-Stimulator Plus will apply a constant direct current (1.0 mA to 2.0 mA via 5x7 electrode) to the left dorsal lateral prefrontal cortex. Each participant will receive anodal stimulation for a period of 20 minutes. For anodal stimulation over the left DLPFC, the anodal electrode will be placed over the left F3 and the cathodal electrode over the right supraorbital area (international EEG 10/20 system).
|
|---|---|---|---|
|
Resisting Smoking - Time to First Cigarette in the Resist Smoking Paradigm
|
60.3 minutes
Standard Deviation 5.2
|
63.4 minutes
Standard Deviation 5.4
|
63.2 minutes
Standard Deviation 4.7
|
PRIMARY outcome
Timeframe: During laboratory session on day 5, assessed for up to 2 hoursParticipant smoking behavior will be assessed during the laboratory session using a validated smoking lapse paradigm. The primary outcome measure is number of cigarettes smoked.
Outcome measures
| Measure |
Sham Dose
n=35 Participants
Participants in this arm will receive the sham transcranial direct current stimulation (tDCS) procedure. During sham tDCS, a 1.0 mA to 2.0 mA current will be delivered for approximately 30 seconds before being extinguished over a course of seconds. The anodal electrode will be placed over the left F3 and the cathodal electrode over the right supraorbital area.
Sham tDCS: During sham tDCS, a 1.0 mA to 2.0 mA current will be delivered for approximately 30 seconds before being extinguished over a course of seconds. Again, the anodal electrode will be placed over the left F3 and the cathodal electrode over the right supraorbital area. Most participants cannot distinguish between real and sham tDCS.
|
1mA Dose
n=35 Participants
Participants in this arm will receive the 1mA transcranial direct current stimulation (tDCS) procedure. A neuroConn DC-Stimulator Plus will apply a constant direct current (1.0 mA via 5x7 electrode) to the left dorsal lateral prefrontal cortex. Each participant will receive anodal stimulation for a period of 20 minutes. For anodal stimulation over the left DLPFC, the anodal electrode will be placed over the left F3 and the cathodal electrode over the right supraorbital area (international EEG 10/20 system).
transcranial direct current stimulation (tDCS): Active tDCS: A neuroConn DC-Stimulator Plus will apply a constant direct current (1.0 mA to 2.0 mA via 5x7 electrode) to the left dorsal lateral prefrontal cortex. Each participant will receive anodal stimulation for a period of 20 minutes. For anodal stimulation over the left DLPFC, the anodal electrode will be placed over the left F3 and the cathodal electrode over the right supraorbital area (international EEG 10/20 system).
|
2 mA Dose
n=36 Participants
Participants in this arm will receive the 2 mA transcranial direct current stimulation (tDCS) procedure. A neuroConn DC-Stimulator Plus will apply a constant direct current (2.0 mA via 5x7 electrode) to the left dorsal lateral prefrontal cortex. Each participant will receive anodal stimulation for a period of 20 minutes. For anodal stimulation over the left DLPFC, the anodal electrode will be placed over the left F3 and the cathodal electrode over the right supraorbital area (international EEG 10/20 system).
transcranial direct current stimulation (tDCS): Active tDCS: A neuroConn DC-Stimulator Plus will apply a constant direct current (1.0 mA to 2.0 mA via 5x7 electrode) to the left dorsal lateral prefrontal cortex. Each participant will receive anodal stimulation for a period of 20 minutes. For anodal stimulation over the left DLPFC, the anodal electrode will be placed over the left F3 and the cathodal electrode over the right supraorbital area (international EEG 10/20 system).
|
|---|---|---|---|
|
Resisting Smoking - Number of Cigarettes Smoked in the Resist Smoking Paradigm
|
1.6 cigarettes
Standard Deviation 0.21
|
1.4 cigarettes
Standard Deviation 0.19
|
1.5 cigarettes
Standard Deviation 0.18
|
SECONDARY outcome
Timeframe: During laboratory session on day 5, assessed for up to 2 hoursThe 10-item brief QSU (QSU-B) questionnaire will be used to assess smoking urges. The QSU-B contains 2 subscales (anticipation of reward, relief from negative affect). The QSU-B with a "Right Now" frame of reference will be administered before the smoking resist paradigm. Urge to smoke for negative affect relief (QSU-B Factor 2) has been linked to outcomes for the smoking resist paradigm. The range of possible scores is 4 to 28, with higher scores indicating greater urges.
Outcome measures
| Measure |
Sham Dose
n=35 Participants
Participants in this arm will receive the sham transcranial direct current stimulation (tDCS) procedure. During sham tDCS, a 1.0 mA to 2.0 mA current will be delivered for approximately 30 seconds before being extinguished over a course of seconds. The anodal electrode will be placed over the left F3 and the cathodal electrode over the right supraorbital area.
Sham tDCS: During sham tDCS, a 1.0 mA to 2.0 mA current will be delivered for approximately 30 seconds before being extinguished over a course of seconds. Again, the anodal electrode will be placed over the left F3 and the cathodal electrode over the right supraorbital area. Most participants cannot distinguish between real and sham tDCS.
|
1mA Dose
n=35 Participants
Participants in this arm will receive the 1mA transcranial direct current stimulation (tDCS) procedure. A neuroConn DC-Stimulator Plus will apply a constant direct current (1.0 mA via 5x7 electrode) to the left dorsal lateral prefrontal cortex. Each participant will receive anodal stimulation for a period of 20 minutes. For anodal stimulation over the left DLPFC, the anodal electrode will be placed over the left F3 and the cathodal electrode over the right supraorbital area (international EEG 10/20 system).
transcranial direct current stimulation (tDCS): Active tDCS: A neuroConn DC-Stimulator Plus will apply a constant direct current (1.0 mA to 2.0 mA via 5x7 electrode) to the left dorsal lateral prefrontal cortex. Each participant will receive anodal stimulation for a period of 20 minutes. For anodal stimulation over the left DLPFC, the anodal electrode will be placed over the left F3 and the cathodal electrode over the right supraorbital area (international EEG 10/20 system).
|
2 mA Dose
n=36 Participants
Participants in this arm will receive the 2 mA transcranial direct current stimulation (tDCS) procedure. A neuroConn DC-Stimulator Plus will apply a constant direct current (2.0 mA via 5x7 electrode) to the left dorsal lateral prefrontal cortex. Each participant will receive anodal stimulation for a period of 20 minutes. For anodal stimulation over the left DLPFC, the anodal electrode will be placed over the left F3 and the cathodal electrode over the right supraorbital area (international EEG 10/20 system).
transcranial direct current stimulation (tDCS): Active tDCS: A neuroConn DC-Stimulator Plus will apply a constant direct current (1.0 mA to 2.0 mA via 5x7 electrode) to the left dorsal lateral prefrontal cortex. Each participant will receive anodal stimulation for a period of 20 minutes. For anodal stimulation over the left DLPFC, the anodal electrode will be placed over the left F3 and the cathodal electrode over the right supraorbital area (international EEG 10/20 system).
|
|---|---|---|---|
|
Urge to Smoke for Negative Affect Relief
|
11.5 units on a scale
Standard Deviation 4.9
|
10.8 units on a scale
Standard Deviation 6.5
|
8.6 units on a scale
Standard Deviation 5.4
|
SECONDARY outcome
Timeframe: Assessed during 7-day monitored abstinence period during study days 6 - 12Number of days of biochemically verified abstinence during the monitoring period will be recorded.
Outcome measures
| Measure |
Sham Dose
n=35 Participants
Participants in this arm will receive the sham transcranial direct current stimulation (tDCS) procedure. During sham tDCS, a 1.0 mA to 2.0 mA current will be delivered for approximately 30 seconds before being extinguished over a course of seconds. The anodal electrode will be placed over the left F3 and the cathodal electrode over the right supraorbital area.
Sham tDCS: During sham tDCS, a 1.0 mA to 2.0 mA current will be delivered for approximately 30 seconds before being extinguished over a course of seconds. Again, the anodal electrode will be placed over the left F3 and the cathodal electrode over the right supraorbital area. Most participants cannot distinguish between real and sham tDCS.
|
1mA Dose
n=35 Participants
Participants in this arm will receive the 1mA transcranial direct current stimulation (tDCS) procedure. A neuroConn DC-Stimulator Plus will apply a constant direct current (1.0 mA via 5x7 electrode) to the left dorsal lateral prefrontal cortex. Each participant will receive anodal stimulation for a period of 20 minutes. For anodal stimulation over the left DLPFC, the anodal electrode will be placed over the left F3 and the cathodal electrode over the right supraorbital area (international EEG 10/20 system).
transcranial direct current stimulation (tDCS): Active tDCS: A neuroConn DC-Stimulator Plus will apply a constant direct current (1.0 mA to 2.0 mA via 5x7 electrode) to the left dorsal lateral prefrontal cortex. Each participant will receive anodal stimulation for a period of 20 minutes. For anodal stimulation over the left DLPFC, the anodal electrode will be placed over the left F3 and the cathodal electrode over the right supraorbital area (international EEG 10/20 system).
|
2 mA Dose
n=36 Participants
Participants in this arm will receive the 2 mA transcranial direct current stimulation (tDCS) procedure. A neuroConn DC-Stimulator Plus will apply a constant direct current (2.0 mA via 5x7 electrode) to the left dorsal lateral prefrontal cortex. Each participant will receive anodal stimulation for a period of 20 minutes. For anodal stimulation over the left DLPFC, the anodal electrode will be placed over the left F3 and the cathodal electrode over the right supraorbital area (international EEG 10/20 system).
transcranial direct current stimulation (tDCS): Active tDCS: A neuroConn DC-Stimulator Plus will apply a constant direct current (1.0 mA to 2.0 mA via 5x7 electrode) to the left dorsal lateral prefrontal cortex. Each participant will receive anodal stimulation for a period of 20 minutes. For anodal stimulation over the left DLPFC, the anodal electrode will be placed over the left F3 and the cathodal electrode over the right supraorbital area (international EEG 10/20 system).
|
|---|---|---|---|
|
Number of Days Abstinent From Cigarettes During Monitored Abstinence Period
|
3.8 Days
Standard Deviation 0.43
|
4.1 Days
Standard Deviation 0.44
|
3.6 Days
Standard Deviation 0.4
|
Adverse Events
Sham Dose
Serious events: 0 serious events
Other events: 0 other events
Deaths: 0 deaths
1mA Dose
Serious events: 0 serious events
Other events: 1 other events
Deaths: 0 deaths
2 mA Dose
Serious events: 0 serious events
Other events: 3 other events
Deaths: 0 deaths
Serious adverse events
Adverse event data not reported
Other adverse events
| Measure |
Sham Dose
n=49 participants at risk
Participants in this arm will receive the sham transcranial direct current stimulation (tDCS) procedure. During sham tDCS, a 1.0 mA to 2.0 mA current will be delivered for approximately 30 seconds before being extinguished over a course of seconds. The anodal electrode will be placed over the left F3 and the cathodal electrode over the right supraorbital area.
Sham tDCS: During sham tDCS, a 1.0 mA to 2.0 mA current will be delivered for approximately 30 seconds before being extinguished over a course of seconds. Again, the anodal electrode will be placed over the left F3 and the cathodal electrode over the right supraorbital area. Most participants cannot distinguish between real and sham tDCS.
|
1mA Dose
n=53 participants at risk
Participants in this arm will receive the 1mA transcranial direct current stimulation (tDCS) procedure. A neuroConn DC-Stimulator Plus will apply a constant direct current (1.0 mA via 5x7 electrode) to the left dorsal lateral prefrontal cortex. Each participant will receive anodal stimulation for a period of 20 minutes. For anodal stimulation over the left DLPFC, the anodal electrode will be placed over the left F3 and the cathodal electrode over the right supraorbital area (international EEG 10/20 system).
transcranial direct current stimulation (tDCS): Active tDCS: A neuroConn DC-Stimulator Plus will apply a constant direct current (1.0 mA to 2.0 mA via 5x7 electrode) to the left dorsal lateral prefrontal cortex. Each participant will receive anodal stimulation for a period of 20 minutes. For anodal stimulation over the left DLPFC, the anodal electrode will be placed over the left F3 and the cathodal electrode over the right supraorbital area (international EEG 10/20 system).
|
2 mA Dose
n=47 participants at risk
Participants in this arm will receive the 2 mA transcranial direct current stimulation (tDCS) procedure. A neuroConn DC-Stimulator Plus will apply a constant direct current (2.0 mA via 5x7 electrode) to the left dorsal lateral prefrontal cortex. Each participant will receive anodal stimulation for a period of 20 minutes. For anodal stimulation over the left DLPFC, the anodal electrode will be placed over the left F3 and the cathodal electrode over the right supraorbital area (international EEG 10/20 system).
transcranial direct current stimulation (tDCS): Active tDCS: A neuroConn DC-Stimulator Plus will apply a constant direct current (1.0 mA to 2.0 mA via 5x7 electrode) to the left dorsal lateral prefrontal cortex. Each participant will receive anodal stimulation for a period of 20 minutes. For anodal stimulation over the left DLPFC, the anodal electrode will be placed over the left F3 and the cathodal electrode over the right supraorbital area (international EEG 10/20 system).
|
|---|---|---|---|
|
Musculoskeletal and connective tissue disorders
Leg pain
|
0.00%
0/49 • 1 week
|
1.9%
1/53 • Number of events 1 • 1 week
|
0.00%
0/47 • 1 week
|
|
Vascular disorders
high blood pressure
|
0.00%
0/49 • 1 week
|
0.00%
0/53 • 1 week
|
2.1%
1/47 • Number of events 1 • 1 week
|
|
Injury, poisoning and procedural complications
Bike accident
|
0.00%
0/49 • 1 week
|
0.00%
0/53 • 1 week
|
2.1%
1/47 • Number of events 1 • 1 week
|
|
Nervous system disorders
Tingling and burning sensation
|
0.00%
0/49 • 1 week
|
0.00%
0/53 • 1 week
|
2.1%
1/47 • Number of events 1 • 1 week
|
Additional Information
Results disclosure agreements
- Principal investigator is a sponsor employee
- Publication restrictions are in place