The Journal of Korean Physical Therapy

  • 제27권1호
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  • Pages.38-42
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  • 2015
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  • 1229-0475(pISSN)
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  • 2287-156X(eISSN)
대한물리치료학회 (The Korean Society of Physical Therapy)
권호 표지

Effect of Transcranial Direct Current Stimulation on Movement Variability in Repetitive - Simple Tapping Task

  • Kwon, Yong Hyun (Department of Physical Therapy, Yeungnam University College) ;
  • Cho, Jeong Sun (Science Culture Research Center, Pohang University of Science and Technology)
  • 투고 : 2015.01.13
  • 심사 : 2015.02.11
  • 발행 : 2015.02.25
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초록

Purpose: Accuracy and variability of movement in daily life require synchronization of muscular activities through a specific chronological order of motor performance, which is controlled by higher neural substrates and/or lower motor centers. We attempted to investigate whether transcranial direct current stimulation (tDCS) over primary sensorimotor areas (SM1) could influence movement variability in healthy subjects, using a tapping task. Methods: Twenty six right-handed healthy subjects with no neurological or psychiatric disorders participated in this study. They were randomly and equally assigned to the real tDCS group or sham control group. Direct current with intensity of 1 mA was delivered over their right SM1 for 15 minutes. For estimation of movement variability before and after tDCS, tapping task was measured, and variability was calculated as standard deviation of the inter-tap interval (SD-ITI). Results: At the baseline test, there was no significant difference in SD-ITI between the two groups. In two-way ANOVA with repeated measurement no significant differences were found in a large main effect of group and interaction effect between two main factors (i.e., group factor and time factor (pre-post test)). However, significant findings were observed in a large main effect of the pre-post test. Conclusion: Our findings showed that the anodal tDCS over SM1 for 15 minutes with intensity of 1 mA could enhance consistency of motor execution in a repetitive-simple tapping task. We suggest that tDCS has potential as an adjuvant brain facilitator for improving rhythm and consistency of movement in healthy individuals.

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참고문헌

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