Relationship between muscle tone and hemodynamics and influence of linear polarized near-infrared rays on hemodynamics and muscle strength

• Project/Area Number: 15K01429
• Research Category: Grant-in-Aid for Scientific Research (C)
• Allocation Type: Multi-year Fund
• Section: 一般
• Research Field: Rehabilitation science/Welfare engineering
• Research Institution: Takasaki University of Health and Welfare
• Principal Investigator: Takeuchi Nobuyuki 高崎健康福祉大学, 保健医療学部, 教授 (20587076)
• Project Period (FY): 2015-04-01 – 2019-03-31
• Project Status: Completed (Fiscal Year 2018)
• Budget Amount: ¥4,810,000 (Direct Cost: ¥3,700,000、Indirect Cost: ¥1,110,000); Fiscal Year 2018: ¥650,000 (Direct Cost: ¥500,000、Indirect Cost: ¥150,000); Fiscal Year 2017: ¥1,170,000 (Direct Cost: ¥900,000、Indirect Cost: ¥270,000); Fiscal Year 2016: ¥1,040,000 (Direct Cost: ¥800,000、Indirect Cost: ¥240,000); Fiscal Year 2015: ¥1,950,000 (Direct Cost: ¥1,500,000、Indirect Cost: ¥450,000)
• Keywords: リハビリテーション / 直線偏光近赤外線 / 筋 / 筋緊張 / 循環動態

Outline of Final Research Achievements

The effect of LPNR radiation on muscle tone and extensibility, muscle hemodynamics, and muscle strength were investigated. Irradiation tended to suppress muscle tone and improve muscle extensibility. The muscle strength was showed to decrease and to improve after irradiation. The MR and FR of APTS showed a moderate negative correlation between the amount of oxidized Hb and StO2. There was no correlation with SR of APTS in all indexes of O-Hb, D-Hb, T-Hb and StO2.

Academic Significance and Societal Importance of the Research Achievements

直線偏光近赤外線療法は主に疼痛緩和に使われているが、汎用性が高く、様々な臨床症状に応用可能なため主研究者は継続的に研究を進めてきた。筋緊張亢進に対する作用や筋伸張性向上効果を認めたことは、リハビリ領域における疼痛緩和以外の臨床場面に利用できる可能性を示している。また筋緊張の皮神経学的要素と酸化Hb量に負の相関を認めたため、筋緊張亢進状態の病態を理解する上での一つの知見を提供できたと考える。

Research Products

• [Presentation] 筋伸張度の違いが筋組織循環動態に与える影響－近赤外分光法による検討－ (2018)
  • Author(s): 竹内伸行，大澤一輝，松本昌尚
  • Organizer: 第57回日本生体医工学会
• [Presentation] 近赤外分光法により測定した筋組織循環動態と筋緊張の関連性 (2017)
  • Author(s): 竹内伸行，藤生大我，松本昌尚，大澤一輝
  • Organizer: 第36回関東甲信越ブロック理学療法士学会
• [Presentation] Effect of high intensity pulse irradiation with linear polarized near-infrared rays on muscle hemodynamics (2016)
  • Author(s): Nobuyuki Takeuchi, Nobuhiro Takezako, Yuko Shimonishi, Shigeru Usuda
  • Organizer: 20th International Meeting of Physical Therapy Science
  • Place of Presentation: Ho Chi Minh City
  • Year and Date: 2016-08-05
  • Int'l Joint Research
• [Presentation] 高強度パルス照射型直線偏光近赤外線照射が局所循環動態に与える影響 (2016)
  • Author(s): 竹内伸行
  • Organizer: 第51回日本理学療法学術大会
  • Place of Presentation: 札幌コンベンションセンター
  • Year and Date: 2016-05-27