2020 Fiscal Year Final Research Report
Comparative psychology research of the extended body-part control
Project/Area Number |
19K21818
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Research Category |
Grant-in-Aid for Challenging Research (Exploratory)
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Allocation Type | Multi-year Fund |
Review Section |
Medium-sized Section 10:Psychology and related fields
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Research Institution | Keio University |
Principal Investigator |
Izawa Ei-Ichi 慶應義塾大学, 文学部(三田), 教授 (10433731)
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Co-Investigator(Kenkyū-buntansha) |
川合 伸幸 名古屋大学, 情報学研究科, 教授 (30335062)
池田 譲 琉球大学, 理学部, 教授 (30342744)
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Project Period (FY) |
2019-06-28 – 2021-03-31
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Keywords | 身体性 / 身体操作 / 道具使用 / 鳥類 / 霊長類 / 頭足類 |
Outline of Final Research Achievements |
This study aimed to investigate the capacity for motor control of extended body-part in non-human animals from a comparative viewpoint. We conducted kinematic analyses of reaching-and-grasping behaviour, as a basic component of this capacity, in crows. We found that crows flexibly switched reaching-movement strategies between on-line feedback and predictive feedforward controls dependently on velocities of moving targets. To investigate the capacity to control of extended body-parts in cephalopods, we aimed to know the function of octopus arms that act as physical effector as well as receptor. For that purpose, arms of two tropical octopus were histologically observed. We found the specific muscles and nerve previously described for other octopus, and also detected volume of these cells vary at site of arm. These features might reflect capacity for flexible motor control of arms in octopus.
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Free Research Field |
動物心理学
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Academic Significance and Societal Importance of the Research Achievements |
ヒトは,道具使用にみられる拡張された身体を制御する能力に長けている。この能力は霊長類以外の動物では検証されてこなかった。本研究では,霊長類以外の動物を対象にした身体拡張性の検証というユニークかつ斬新な試みを行った。身体拡張性の基礎となる到達把握運動に焦点を当て,鳥類カラスが動く餌を掴むという短時間の中で,視覚を用いた高速運動制御が行われていることが判明した。頭足類タコの腕の解剖学的解析によって,柔軟な動きを可能にする特徴的形態が判明した。本研究を今後さらに展開し,ヒトとヒト以外の動物との比較によって,私たちヒトの際立った身体拡張性の進化起源の理解へとつながることが期待される。
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