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http://dx.doi.org/10.5392/JKCA.2012.12.07.261

Effect of tDCS Stimulation for Improving Working Memory on Stroke Patients' EEG Variation  

Bae, Si-Jeol (씨티병원 재활센터)
Jeong, Woo-Sik (남평미래병원 재활센터)
Lee, Hong-Gyun (동신대학교 물리치료학과)
Kim, Kyung-Yoon (동신대학교 물리치료학과)
Publication Information
The Journal of the Korea Contents Association / v.12, no.7, 2012 , pp. 261-272 More about this Journal
Abstract
This study was conducted so as to examine which change tDCS (Transcranial Direct Current Stimulation) for improving working memory can make on the EEC of stroke patients. Among the patients who suffered for more than 6 months by hemiparalysis caused by stroke, 20 patients selected by MMSE and DST were randomly divided into I group (10 patients) fulfilled by only CCT and II group (10 patients) fulfilled by both tDCS and CCT for total 4 weeks, 30 minutes per a day, three times per a week. For examining EEC variation, the absolute spectrum power was calculated by three bands (${\theta}$; 4~8 Hz, lower ${\alpha}$; 8~10.5 Hz, upper ${\alpha}$;10.5~13 Hz) during the task of words, photos and mental calculation with EEC test, before the arbitration, after 2 weeks and after 4 weeks, so the rate of increase and decrease (%) for the reference EEC was obtained. As the results, the first, particular aspects different one another in three bands were detected according to the measuring period and task. The second, in the forth week, there was only a significant difference in lower ${\alpha}$-power of all tasks. Therefore, through the procedure measuring EEC of this study, the degree of working memory's damage can be expressed by numerical value and tDCS should be additionally helpful for brain damaged patients' perception rehabilitation.
Keywords
Stroke; EEG; tDCS; Working Memory;
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