• Users Online: 1355
  • Home
  • Print this page
  • Email this page
Year : 2015  |  Volume : 10  |  Issue : 3  |  Page : 463-466

Is effect of transcranial direct current stimulation on visuomotor coordination dependent on task difficulty?

1 Department of Physical Therapy, Yeungnam University College,170, Daemyung-dong, Namgu, Daegu, 705-703, Republic of Korea
2 Department of Physical Therapy, College of Rehabilitation Science, Daegu University, 15, Jilyang, Gyeongsan-si, Kyeongbuk, 712-714, Republic of Korea
3 Department of Physical Therapy, College of Health Science, Cheongju University, 298 Daeseong-ro, Cheongwon-gu, Cheongju-si, Chungbuk 363-764, Republic of Korea

Correspondence Address:
Na Kyung Lee
Department of Physical Therapy, College of Rehabilitation Science, Daegu University, 15, Jilyang, Gyeongsan-si, Kyeongbuk, 712-714
Republic of Korea
Login to access the Email id

Source of Support: This work was supported by Basic Science Research Program through the National Research Foundation of Korea (NRF) funded by the Ministry of Science, ICT & Future Planning, No. 2012R1A1B4003477., Conflict of Interest: None

DOI: 10.4103/1673-5374.153697

Rights and Permissions

Transcranial direct current stimulation (tDCS), an emerging technique for non-invasive brain stimulation, is increasingly used to induce changes in cortical excitability and modulate motor behavior, especially for upper limbs. The purpose of this study was to investigate the effects of tDCS of the primary motor cortex on visuomotor coordination based on three levels of task difficulty in healthy subjects. Thirty-eight healthy participants underwent real tDCS or sham tDCS. Using a single-blind, sham-controlled crossover design, tDCS was applied to the primary motor cortex. For real tDCS conditions, tDCS intensity was 1 mA while stimulation was applied for 15 minutes. For the sham tDCS, electrodes were placed in the same position, but the stimulator was turned off after 5 seconds. Visuomotor tracking task, consisting of three levels (levels 1, 2, 3) of difficulty with higher level indicating greater difficulty, was performed before and after tDCS application. At level 2, real tDCS of the primary motor cortex improved the accurate index compared to the sham tDCS. However, at levels 1 and 3, the accurate index was not significantly increased after real tDCS compared to the sham tDCS. These findings suggest that tasks of moderate difficulty may improve visuomotor coordination in healthy subjects when tDCS is applied compared with easier or more difficult tasks.

Print this article     Email this article
 Next article
 Previous article
 Table of Contents

 Similar in PUBMED
   Search Pubmed for
   Search in Google Scholar for
 Related articles
 Citation Manager
 Access Statistics
 Reader Comments
 Email Alert *
 Add to My List *
 * Requires registration (Free)

 Article Access Statistics
    PDF Downloaded340    
    Comments [Add]    
    Cited by others 8    

Recommend this journal