Development of the voluntary movement extraction method from the movement including the involuntary movement of the person with diseases of the central nervous system

• Project/Area Number: 18K18425
• Research Category: Grant-in-Aid for Early-Career Scientists
• Allocation Type: Multi-year Fund
• Review Section: Basic Section 90150:Medical assistive technology-related
• Research Institution: National Rehabilitation Center for Persons with Disabilities
• Principal Investigator: Takashima Atsushi 国立障害者リハビリテーションセンター(研究所), 研究所 福祉機器開発部, 研究員 (90711284)
• Project Period (FY): 2018-04-01 – 2022-03-31
• Project Status: Completed (Fiscal Year 2021)
• Budget Amount: ¥4,160,000 (Direct Cost: ¥3,200,000、Indirect Cost: ¥960,000); Fiscal Year 2020: ¥1,300,000 (Direct Cost: ¥1,000,000、Indirect Cost: ¥300,000); Fiscal Year 2019: ¥1,690,000 (Direct Cost: ¥1,300,000、Indirect Cost: ¥390,000); Fiscal Year 2018: ¥1,170,000 (Direct Cost: ¥900,000、Indirect Cost: ¥270,000)
• Keywords: 重度肢体不自由者 / 電動車椅子 / 反力提示デバイス / 肢体不自由者 / 動作解析 / 運動障害 / 力覚提示 / 中枢性運動障害 / 動作計測 / 共同運動 / 連合運動 / 脳性まひ

Outline of Final Research Achievements

The purpose of this study is to investigate and develop a method to enable a person with severe physical disability to operate a power wheelchair voluntarily. To achieve this goal, first, we proposed a method to optimize the joystick position of a power wheelchair controller for a person with cervical cord injury. Second, based on the suggestions obtained from the experiments, we designed and fabricated two types of controllers that present reaction force. Prototype 1 was fabricated to demonstrate the mechanism and functionality of the controller as a proof of concept, and Prototype 2 was based on Prototype 1 and improved for practical use to achieve a practical size and functionality.

Academic Significance and Societal Importance of the Research Achievements

本研究で開発した力覚提示ジョイスティックは，重度肢体不自由者に対して電動車椅子操作中にどういった力をどの方向に発揮しているのかを知ることができる．
従来，電動車椅子操作が難しい重度肢体不自由者に対しては自力での移動を断念し，介護者による移動手段しか実現できなかったところ，本ジョイスティックを使うと，どういった動作ができていて，どういった動作ができないのか，また，どうすれば操作できるようになるのかがわかり，重度肢体不自由者の電動車椅子への適用が広がると考えられる．これにより重度肢体不自由者の社会参加を助けることにつながると考える．

Research Products

• [Journal Article] Knee extensor strength assessed using a vertical squat and a simple geometric model to calculate joint torque: An evaluation of validity and clinical utility (2018)
  • Author(s): Sato Haruhiko、Kusayanagi Koki、Kondo Yu、Kamide Naoto、Shiba Yoshitaka、Takashima Atsushi
  • Journal Title: Geriatrics & Gerontology International Volume: - Issue: 7 Pages: 1125-1131
  • DOI: 10.1111/ggi.13299
  • Peer Reviewed
• [Presentation] 2.Classification of Physiological Factors of Physical Condition in People Suffering from Spinal Cord Injury (2022)
  • Author(s): Takuo Adachi, Atsushi Takashima, Daisuke Kurabayashi, Kazushi Sanada, Koji Tomiyasu, Atsuko Yatabe, Toyoko Suzuki, Yukiharu Higuchi, Shintaro Nishiki, Yoshio Tanimoto, Toru Ogata
  • Organizer: IEEE/SICE International Symposium on System Integration (SII)
  • Int'l Joint Research
• [Presentation] 脊髄損傷者の体調理解に向けた生理計測と体調評価指標の解析 (2021)
  • Author(s): 安達拓生，高嶋 淳，倉林 大輔，眞田 一志，冨安 幸志，矢田部 あつ子，鈴木 豊子，樋口 幸治，谷本 義雄，緒方 徹
  • Organizer: 第33回自律分散システム・シンポジウム
• [Presentation] A trial of linear dynamic model extension to improve prediction accuracy of core temperature change for persons with spinal cord injury (2020)
  • Author(s): Masaru Yokota ; Jun Suzurikawa ; Yukiharu Higuchi ; Toshiyo Tamura ; Daisuke Kurabayashi ; Takenobu Inoue ; Toru Ogata ; Atsushi Takashima
  • Organizer: 2020 IEEE/SICE International Symposium on System Integration (SII)
  • Int'l Joint Research
• [Presentation] Wheel chair control skill assessment for the persons with severe physical disabilities (2018)
  • Author(s): Takashima Atushi
  • Organizer: the 2018 World Congress on Medical Physics and Biomedical Engineering
  • Int'l Joint Research