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To investigate the effects of different montages of tDCS on muscle strength in healthy adults
Electrode montage or placement of tDCS over primary motor cortex can be categorized into unilateral (anodal or cathodal electrode over primary motor area) and bilateral tDCS (both anodal and cathodal electrode over the cortex). Previous studies reported benefits of different tDCS montages on muscle performance in healthy participants. However, there is no guideline for tDCS montages. This study aims to investigate immediate effects of different tDCS montages on muscle strength in healthy participants.
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| Label | Type | Description | Intervention Names |
|---|---|---|---|
| Anodal-tDCS | Experimental | Anodal transcranial direct current stimulation (tDCS) will be applied for 20 mins. Anode on the primary motor area (M1) of dominant hemisphere and Cathode on the supraorbital area of non-dominant hemisphere. Current intensity is fixed at 2 mA and current will flow continuously. The scope of intervention is to investigate effect of tDCS on muscle strength. |
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| Cathodal-tDCS | Experimental | Cathodal transcranial direct current stimulation (tDCS) will be applied for 20 mins. Cathode on the primary motor area (M1) of non-dominant hemisphere and Anode on the supraorbital area of dominant hemisphere. Current intensity is fixed at 2 mA and current will flow continuously. The scope of intervention is to investigate effect of tDCS on muscle strength. |
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| Dual-tDCS | Experimental | Dual transcranial direct current stimulation (tDCS) will be applied for 20 mins. Anode on the primary motor area (M1) of dominant hemisphere and Cathode on the primary motor area of non-dominant hemisphere. Current intensity is fixed at 2 mA and current will flow continuously. The scope of intervention is to investigate effect of tDCS on muscle strength. |
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| Sham-tDCS | Sham Comparator | Dual transcranial direct current stimulation (tDCS) will be applied over C3-C4 or the motor area (M1) for 20 mins. Anode on dominant hemisphere, Cathode on non-dominant hemisphere. The scope of intervention is to investigate effect of tDCS on muscle strength. |
| Name | Type | Description | Arm Group Labels | Other Names |
|---|---|---|---|---|
| Transcranial direct current stimulation | Device | Dual/Cathodal/Anodal/Sham tDCS will be applied in 2 mA, 20 mins. All experiments will be performed in random order for each subject. |
| Measure | Description | Time Frame |
|---|---|---|
| Change from baseline muscle strength after tDCS | Muscle strength will be measured in Newton by using a hand-held dynamometer. | Baseline (Pretest) and 40 minutes ( posttest) |
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Inclusion Criteria:
Exclusion Criteria:
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| Name | Affiliation | Role |
|---|---|---|
| Wanalee Klomjai, PhD | MU | Study Director |
| Facility | Status | City | State | ZIP | Country | Contacts |
|---|---|---|---|---|---|---|
| Faculty of Physical Therapy, Mahidol University | Salaya | Changwat Nakhon Pathom | 73170 | Thailand |
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| ID | Term |
|---|---|
| D065908 | Transcranial Direct Current Stimulation |
| ID | Term |
|---|---|
| D004599 | Electric Stimulation Therapy |
| D013812 | Therapeutics |
| D003295 | Convulsive Therapy |
| D013000 | Psychiatric Somatic Therapies |
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| D004191 | Behavioral Disciplines and Activities |
| D004597 | Electroshock |
| D011580 | Psychological Techniques |