1F45 TMS coil navigation System for high precision motor cortex mapping

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  • SHIMIZU Yuko
    Shibaura Institute of Technology. Dept. of System Engineering and Science
  • KITAMURA Taku
    Research Institute, National Rehabilitation Center for Persons with Disabilities
  • YAMAMOTO Shin-ichiro
    Shibaura Institute of Technology. Dept. of System Engineering and Science
  • KAWASHIMA Noritaka
    Research Institute, National Rehabilitation Center for Persons with Disabilities

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Other Title
  • 1F45 磁気刺激コイル定位システムを活用した精度の高い運動野マッピング手法の開発

Abstract

Transcranical magnetic stimulation (TMS) mapping is a valuable tool to investigate cortical representations. Recently, a time saving method that gives stimulations at randomly selected points around a hotspot has been proposed In order to accomplish TMS mapping effectively, we here utilize center of gravity (COG) as a new indicator of random mapping instead of hotspot, to gain an accurate map in short time. Six healthy subjects participated in this study and we examined two types of mapping method that was mapped without COG navigation and with COG navigation The data set were randomly extracted one by one from the 100th, minus the outlier stimuli, to the 20th stimuli and the correlation coefficient was calculated and compared to the original mapped data. In our results, there were no significant differences between with COG NAVI and without COG NAVI in all compared data sets. However, with COG NAVI tended to show greater reliability after 40 points. In conclusion, we can define COG as the new indicator of TMS mapping. Therefore, we could offer the possibility of saving time during hotspot determination and making it possible to get a map easily without skills.

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