Different Montages of Transcranial Direct Current Stimulation Tongue Strength

Study Overview
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Brief Summary
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20 healthy subjects will be split into 4 groups. Each group will receive one of the following tDCS montages : anodal, bilateral, cathodal or placebo Subjects will receive 2mA for 20 mins of their attributed tDCS. The evaluation is a maximal strength test measured with the IOPI and will take place prior to, immediately following and 30 minutes after stimulation

Official Title
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The Effects of Different Montages of Transcranial Direct Current Stimulation on Tongue Strength in Healthy Subjects

Conditions
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Healthy

Intervention / Treatment
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* Device: Transcranial Direct Current Stimulation


Participation Criteria
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Eligibility Criteria
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Inclusion Criteria: Healthy Exclusion Criteria: One Yes on the medium and high risk sections of the TSST (Bornheim et al.,2019)

Ages Eligible for Study
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Minimum Age: 18 Years
Maximum Age: 50 Years

Sexes Eligible for Study
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All

Accepts Healthy Volunteers
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Accepts Healthy Volunteers

Study Plan
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How is the study designed?
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Design Details

Primary Purpose: Treatment
Allocation: Randomized
Intervention Model: Crossover Assignment
Interventional Model Description: 4 groups, each group receives one of three treatments or the sham treatment. Double-blinded, sham controlled, crossover study
Masking: Triple


Arms and Interventions

| Participant Group/Arm | Intervention/Treatment |
| --- | --- |
| Experimental: Anodal<br>Anode placer over the affected primary motor cortex, cathode over contralateral supra orbital area. 2 mA, 20min stimulation | Device: Transcranial Direct Current Stimulation<br>* Subjects received a micro-current through their scalp to induce cortical and subcortical changes<br>* Other names: tDCS;|
| Experimental: Bilateral<br>Anode placer over the affected primary motor cortex, cathode over unaffected motor cortex. 2 mA, 20min stimulation | Device: Transcranial Direct Current Stimulation<br>* Subjects received a micro-current through their scalp to induce cortical and subcortical changes<br>* Other names: tDCS;|
| Experimental: Cathodal<br>Cathode placer over the unaffected primary motor cortex, anode over contralateral supra orbital area. 2 mA, 20min stimulation | Device: Transcranial Direct Current Stimulation<br>* Subjects received a micro-current through their scalp to induce cortical and subcortical changes<br>* Other names: tDCS;|
| Placebo Comparator: Placebo<br>anode montage but current is ramped up over 15 secondes, then ramped down. 2 mA, 20min stimulation | Device: Transcranial Direct Current Stimulation<br>* Subjects received a micro-current through their scalp to induce cortical and subcortical changes<br>* Other names: tDCS;|

What is the study measuring?
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Primary Outcome Measures

| Outcome Measure | Measure Description | Time Frame |
| --- | --- | --- |
| Change Tongue Maximal Strength | 1 RM of tongue strength, measured using the IOPI device | Baseline, immediately after, and 30 minutes after tDCS | 

 Terms related to the study
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Keywords Provided by Centre Hospitalier Valida
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tDCS, IOPI, Tongue Strength, Healthy