Introduction: Beginner's faster advancement in motor skills learning, will depend on the use of different body limbs and activation of the central nervous system. Due to time constraints often the subtle Using of right and left limbs is not possible. Sometimes due to the dominant limbs damage and Non-sport/sport events, there has been limited use of the upper hand and then to overcome the limitations, one is inevitably use of non-dominant hand. Today increasing prevalence of diseases such as stroke, we need for studies of ways that reported to be effective in improving cognitive function and movement.
Methodology: Participants of this study was included 40 right-handed students with an average age of 21.2 years that were selected by convenience sampling and were grouping in the 4 groups of 10 persons. The instrument used in this study included bimanual coordination device and tDCS devise. Pre-test include drawing an eight-line star task with the non-dominant hand during 30 seconds that was done without exerting tDCS. Training was conducted on three consecutive days. during training, was applied positive electrical stimulation in the right motor cortex and negative in the left motor cortex at the C3 and C4. After that, was performed the post-test and retention test a week later.
Results: According to the results, unilateral and bilateral training groups with electric stimulation outperformed their bogus groups and bilateral training groups with electrical stimulation outperformed unilateral training group by stimulating.
Discussion: Research has shown that applying anodal tDCS to the non-dominant motor cortex can improve motor performance for the non-dominant hand, presumably by means of changes in synaptic plasticity between neurons. It also applying cathodal tDCS over the dominant motor cortex can improve performance for the non-dominant hand that may result from modulating inhibitory projections (inter-hemispheric inhibition) between the motor cortices of the two hemispheres. The results of some studies have shown that transcranial direct current stimulation significantly improves the performance of non-dominant hand. The purpose of bilateral training is to enable dominant hemisphere facilitate the non-dominant hemisphere activation that leads to improved motor control of non-dominant limb. Accordingly, the use of these training can be effective in improving motor function in non-dominant hand. Bilateral movements employ more brain circuits and thus the Incorporation of bilateral training and transcranial direct current stimulation that increases cortical excitability leads to a better motor performance with the non-dominant hand.