2023 Fiscal Year Final Research Report
The differential effects of hand dominance in precision grip force control
| Project/Area Number |
20K11476
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| Research Category |
Grant-in-Aid for Scientific Research (C)
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| Allocation Type | Multi-year Fund |
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| Section | 一般 |
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| Review Section |
Basic Section 59030:Physical education, and physical and health education-related
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| Research Institution | Osaka Aoyama University |
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Principal Investigator |
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| Co-Investigator(Kenkyū-buntansha) |
中西 康人 大阪産業大学, スポーツ健康学部, 教授 (50622669)
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| Project Period (FY) |
2020-04-01 – 2024-03-31
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| Keywords | 左右差 / 利き手 / 指 / 把握力 / 道具使用 / ターゲット照射精度 / 運動制御 / 把握器 |
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| Outline of Final Research Achievements |
The present study investigated manual asymmetries in the control of grasping and lifting forces, and displacement of a small object during maneuvers of lifting (dynamic) and holding in space (static), and while aiming a small target using a laser pointer attached to an object (tool). The right-handed individuals grasped and fixed objects with their dominant hand more securely in dynamic and static operations. The left-handed individuals, on the other hand, showed stronger dominant hand gripping behavior only during the static phase. The findings indicated that manual asymmetries affected force application behavior during object manipulation. Environmental factors in right-handed societies seemed to affect left-handers' right-hand dynamic function more dominant. Aimed irradiation of visual targets resulted in more enhanced gripping and fixation of the object, but no more excessive facilitative behavior was observed in the dominant hand due to the use of a laser pointer as a manual tool.
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| Free Research Field |
運動制御学、バイオメカニクス、運動生理学
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| Academic Significance and Societal Importance of the Research Achievements |
軽量物体の指先での持ち上げ（動的）運動と安定保持（静的）運動における物体への作用力量や空間位置の安定性が左右の手で異なること，さらに右利きと左利きではそれらの左右手間の差が異なることを初めて明らかにした．また，物体の空間位置の精度を上げる課題においては把握力を増強するために手と物体の固定戦略が採られること，そしてその戦略実行において利き手が非利き手よりも長けていることも明らかにした．これらの発見は，運動制御学，側性科学に留まらず，利き手問題を取り扱う発達/老化科学，教育学，脳科学，リハビリテーション科学，行動心理学，人間工学などの諸学問領域でも活用可能な情報である.
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