<b>Neural differences in corticospinal excitability between in-phase and antiphase movements during bilateral ankle movements </b>

DOI
  • Numata Atsuki
    Physical Therapy Course, Department of Rehabilitation, Faculty of Medical Science and Welfare, Tohoku Bunka Gakuen University
  • Tsuchiya Junko
    Department of Physical Therapy, School of Health Sciences, Tokyo University of Technology
  • Tatemoto Tsuyoshi
    Faculty of Rehabilitation, School of Health Science, Fujita Health University
  • Osawa Ryuji
    Graduate Course of Health and Social Services, Kanagawa University of Human Services Graduate School
  • Suzuki Tomotaka
    Physical Therapy Major, School of rehabilitation, Faculty Health and Social Services, Kanagawa University of Human Services
  • Tanabe Shigeo
    Faculty of Rehabilitation, School of Health Science, Fujita Health University
  • Sugawara Kenichi
    Physical Therapy Major, School of rehabilitation, Faculty Health and Social Services, Kanagawa University of Human Services

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Other Title
  • <b>両側足関節の反復運動における位相の違いが皮質脊髄路興奮性に与える影響 </b>

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Abstract

<p>Objective: Detailed mechanisms underlying neural control of bilateral ankles during repetitive ankle movements are still unknown. The aim of the present study was to investigate how the neural properties were different between in-phase and antiphase repetitive bilateral ankle movements. Methods: Fifteen healthy young adults participated in the study. The participants performed in-phase (move the bilateral ankle simultaneously) and anti-phase (move the bilateral ankle alternately) repetitive ankle movements tasks in randomized order. Single or paired TMS (ISI=2ms, for measuring short intracortical inhibition: SICI) was delivered at hotspot which both motor-evoked potential (MEP) of the right tibialis anterior muscle (TA) and the soleus muscle (SOL) were detected in left primary motor cortex, when EMG of right TA were on-set and off-set condition during ankle movements tasks. Results: In off-set condition, The MEP amplitude of the SOL during antiphase task was significantly larger than that during inphase task. There were no significant diff erences between tasks in the MEP amplitude of the SOL at on-set condition and the TA in both conditions, and SICI in both conditions of TA and SOL. Conclusion: Neural property of the repetitive movement was prominent during antiphase movement of the ankles. These results suggest that the properties of phase during repetitive movement of the bilateral lower limbs might be considered in rehabilitative interventions.</p>

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