2022 Fiscal Year Final Research Report
Evaluation of sensory weighting and joint strategy in balance control for horizontal sway of the support surface
| Project/Area Number |
20K04366
|
|---|
| Research Category |
Grant-in-Aid for Scientific Research (C)
|
| Allocation Type | Multi-year Fund |
|---|
| Section | 一般 |
|---|
| Review Section |
Basic Section 20010:Mechanics and mechatronics-related
|
|---|
| Research Institution | Kochi University of Technology |
|---|
Principal Investigator |
|
|---|
| Co-Investigator(Kenkyū-buntansha) |
池内 昌彦 高知大学, 教育研究部医療学系臨床医学部門, 教授 (00372730)
永野 靖典 高知大学, 教育研究部医療学系臨床医学部門, 助教 (30380372)
|
|---|
| Project Period (FY) |
2020-04-01 – 2023-03-31
|
| Keywords | バランス / 検査 / 感覚器重みづけ / 制御戦略 / フォースプレート / 慣性センサ / 体性感覚 / 前庭感覚 |
|---|
| Outline of Final Research Achievements |
This study aimed to obtain basic knowledge for utilizing the differences in subjects' responses to constant-frequency sway for checking the sensory re-weighting and joint strategies. To clear the findings on frequency-dependent strategies, we conducted our experiments on healthy subjects. The results showed that subjects used only the ankle joint strategy at lower frequencies, bounded by approximately 0.7 Hz, and the hip joint strategy gradually increased at higher frequencies. Regarding sensory weighting, at frequencies higher than around 0.4 Hz, the dominant strategy was a vestibular sensation, which controls the head acceleration, while at lower frequencies, the dominant strategy was somatosensory, which controls the center of mass. To investigate the somatosensory perception of diabetic patients, The result of the constant frequency test at 0.3 Hz showed that the phase difference between the center of pressure and the center of mass was larger than that of healthy subjects.
|
| Free Research Field |
ヒューマンダイナミクス
|
| Academic Significance and Societal Importance of the Research Achievements |
感覚器重みづけというテーマで多くの研究が行われてきたが，特に前庭感覚と体性感覚の重みづけを正確に測る手法は発泡材上での立位といった原始的な方法に限られており，動作の正確な計測も困難であった．本研究では，一定周波数揺動の周波数を変えることで感覚器の重みづけを変化させて，その機能を評価することを試みている．このアプローチは，体性感覚障害が起こる糖尿病患者，頚髄症患者や，前庭感覚障害が起こるめまい患者における感覚器障害の程度を詳しく知りたいときに活用できる可能性が高く，糖尿病患者の計測では健常者との違いがみられた．
|
