The Effects of Transcranial Direct Current Stimulation (tDCS) on Working Memory in Healthy Young Adults
Subject Areas :Nima ganji 1 , Roza Rashedi 2 , نگار کریمی 3 , پروانه فرهاد بیگی 4 , Ali Akbar Soleimani 5 , Azam Noferesti 6 , Mohammad Hossein Abdollahi 7 , Fatemeh Moin Al-Ghorabaei 8
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Abstract :
Introduction: Working memory is one of the fundamental cognitive ability that helps us perform complex mental processes but has limited capacity. Scientists are looking for ways to increase working memory capacity. Numerous studies have shown the effect of direct transcranial stimulation (tDCS) on various aspects of performance. The aim of this study was to evaluate the effectiveness of transcranial direct current stimulation on working memory function in healthy individuals. Methods: In this study, the effect of three-session of anodal tDCS stimulation period with an intensity of 2 mA in the lateral posterior anterior cortex on the working memory function of healthy individuals in two experimental and control random groups was investigated using N-Beck test. Results: The results showed that the subjects in the experimental group after three sessions of direct transcranial stimulation, presented a higher number of correct answers (p= 0.00) in less response time (p=0.00) in n-back task compare to their performance before the tDCS sessions. Subjects didn’t show significant difference through the same analysis which was performed in the control group. Conclusion: According to the n-back task results, before and after tDCS 3-session intervention, anodal transcranial stimulation on dorsal-lateral prefrontal cortex (DLPFC) improves the performance of healthy subjects in the experimental group and tDCS neuromodulation could be an alternative way to improve cognition abilities like working memory among of healthy people.
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