プリズム適応における学習と記憶保持特性に与える重力の影響  [in Japanese] The effect of gravity on learning and memory retention characteristics in prism adaptation  [in Japanese]

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Author(s)

Abstract

我々の身体運動は地上重力との相互作用のもとで調整されており,重力環境が変化すれば,運動制御の再調整が必要になる.また,運動の学習や記憶保持特性に変調をきたす可能性もある.これまで,微小重力下におけるこうした運動の適応過程については,宇宙飛行士による経験的な内省としての報告はあるが,適応時の学習特性や忘却特性と重力の関係に関する定量的な評価は見あたらない.本研究では,重力環境の変化が運動の学習,忘却特性,ならびに記憶保持に与える影響を評価するため,リーチング動作のプリズム適応実験を,1)座位と仰臥位,2)通常重力と過重力環境下で実施し,比較した.その結果,仰臥位は座位に比べ,過重力下では通常重力下に比べ,学習スピードが速く,記憶保持率が高くなることが示された.

Our body motion is adjusted properly under 1G condition on the earth. Thus changes in gravitational environment have significant impact on our motor control. Further, it may affect on our ability in motor learning and memory. Although some astronauts informally reported difficulties in their body control under microgravity, no quantitative research on this issue has not been conducted. Here we performed the prism adaptation of a hand-reaching task under different gravitational environments. We compared learning and forgetting curves, and memory retention rates of the prism adaptation performed in upright and supine positions, and under 1G and 2G hyper-gravity conditions. We demonstrate that quicker learning, less forgetting and greater memory retention rates are obtained in a supine position and under 2G in comparison with their counter part.

Journal

  • IEICE technical report

    IEICE technical report 109(461), 367-372, 2010-03-02

    The Institute of Electronics, Information and Communication Engineers

References:  5

Codes

  • NII Article ID (NAID)
    110008004328
  • NII NACSIS-CAT ID (NCID)
    AN10091178
  • Text Lang
    JPN
  • Article Type
    ART
  • ISSN
    09135685
  • NDL Article ID
    10649826
  • NDL Source Classification
    ZN33(科学技術--電気工学・電気機械工業--電子工学・電気通信)
  • NDL Call No.
    Z16-940
  • Data Source
    CJP  NDL  NII-ELS 
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