Task Difficulty and Modification of Spinal Motor Neuron Activity in Motor Learning

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  • ASAI Naoki
    Division of Rehabilitation Engineering Research, Department of Research, Kanagawa Rehabilitation Hospital Graduate School of Health and Human Services, Kanagawa University of Human Services
  • SUZUKI Tomotaka
    Graduate School of Health and Human Services, Kanagawa University of Human Services
  • SUGAWARA Kenichi
    Graduate School of Health and Human Services, Kanagawa University of Human Services

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Other Title
  • 運動課題の姿勢の安定性に関わる難度の差異とその学習に伴う脊髄運動神経興奮性の変化
  • ウンドウ カダイ ノ シセイ ノ アンテイセイ ニ カカワル ナンド ノ サイ ト ソノ ガクシュウ ニ トモナウ セキズイ ウンドウ シンケイ コウフンセイ ノ ヘンカ

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<p>[Purpose] The purpose of this study was to examine the progression of motor learning and the soleus H-reflex changes induced by repetitive training of two tasks with different difficulty levels. [Participants and Methods] Twenty-one healthy adults were assigned to two groups: high and low difficulty training groups. They performed a motor task on a wobble board according to their group level of difficulty. The task error, the soleus H-reflex, and electromyography were measured at baseline and at the end of the training. [Results] The amplitude of the soleus H-reflex and the tibialis anterior muscle activity declined after training in the high difficulty training group. The task error declined significantly more in the low difficulty training group. [Conclusion] The results of the present study suggest that task difficulty modulates the progression of motor learning which is accompanied by a change in spinal motor neuron activity induced by training.</p>

Journal

  • Rigakuryoho Kagaku

    Rigakuryoho Kagaku 34 (6), 793-800, 2019

    The Society of Physical Therapy Science

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