MURAOKA, Yoshihiro

写真a

Affiliation

Faculty of Human Sciences, School of Human Sciences

Job title

Professor

Concurrent Post 【 display / non-display

  • Affiliated organization   Global Education Center

  • Faculty of Human Sciences   Graduate School of Human Sciences

Education 【 display / non-display

  • 1997.04
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    2000.03

    Keio Univ.   Graduate School of Science and Technology   Biomedical Engineering  

  • 1995.04
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    1997.03

    Keio Univ.   Graduate School of Science and Technology   Biomedical Engineering  

  • 1991.04
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    1995.03

    Keio Univ.   Faculty of Science and Technology   Instrumentation Engineering  

Degree 【 display / non-display

  • Keio Univ.   Ph.D. in Engineering

Research Experience 【 display / non-display

  • 2011.04
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    2015.03

    Waseda University   Department of Health Science and Welfare, Faculty of Human Sciences   Associate Professor

  • 2008.08
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    2011.03

    National Hospital Organization Murayama Medical Center   Biomedical Engineering Laboratory, Clinical Research Center   Chief of Laboratory

  • 2008.04
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    2008.07

    Fujita Health University   Faculty of Rehabilitation, School of Health Sciences   Associate Professor

  • 2007.04
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    2008.03

    Fujita Health University   Faculty of Rehabilitation, School of Health Sciences   Associate Professor

  • 2004.04
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    2007.03

    Fujita Health University   Faculty of Rehabilitation, School of Health Sciences   Associate Professor

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Professional Memberships 【 display / non-display

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    The Clinical Gait Analysis Forum of Japan

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    The Keio Medical Society

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    THE JAPANESE SOCIETY FOR WELLBEING SCIENCE AND ASSISTIVE TECHNOLOGY

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    The Japanese Society of Prosthetics and Orthotics

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    The Japanese Association of Rehabilitation Medicine

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Research Areas 【 display / non-display

  • Rehabilitation science

Research Interests 【 display / non-display

  • Biomedical Instrumentation Engineering

Papers 【 display / non-display

  • Teacher-learner interaction quantifies scaffolding behaviour in imitation learning.

    Shuntaro Okazaki, Yoshihiro Muraoka, Rieko Osu

    Scientific reports   9 ( 1 ) 7543 - 7543  2019.05  [International journal]

     View Summary

    Teachers often believe that they take into account learners' ongoing learning progress in their teaching. Can behavioural data support this belief? To address this question, we investigated the interactive behavioural coordination between teachers and learners during imitation learning to solve a puzzle. The teacher manually demonstrated the puzzle solution to a learner who immediately imitated and learned it. Manual movements of teachers and learners were analysed using a bivariate autoregressive model. To identify bidirectional information exchange and information shared between the two agents, we calculated causality and noise covariance from the model. Information transfer observed from teacher to learner in the lateral component of their motion indicated imitation of the spatial information of the puzzle solution. Information transfer from learner to teacher in the vertical component of their motion indicated the monitoring process through which teachers adjust their timing of demonstration to the learner's progress. The shared information in the lateral component increased as learning progressed, indicating the knowledge was shared between the two agents. Our findings demonstrated that the teacher interactively engaged in and contingently supported (i.e. scaffolded) imitation. We thus provide a behavioural signature of the teacher's intention to promote learning indispensable for understanding the nature of teaching.

    DOI PubMed

  • Assessment of daily physical activities with sensors attached to the upper limbs in healthy adults using a manual wheelchair

    Ryuji Takigawa, Takayo Inayama, Kengo Yamada, Yoshihiro Muraoka, Kazunori Ohkawara

    The Journal of Physical Fitness and Sports Medicine   7 ( 3 ) 193 - 202  2018.05  [Refereed]

    DOI

  • Development of small low-cost biofeedback device using swallowing sound and electromyography of suprahyoid muscles

    Okazaki, Shuntaro, Muraoka, Yoshihiro, Suzuki, Risa

    Sogo rehabilitation   in ( press )  2018  [Refereed]

  • Development of the low-cost electromyography feedback device for smartphones (the 2nd report) –Measures for the current model -

    Suzuki, Risa, Muraoka, Yoshihiro

    Sogo rehabilitation   45 ( 11 ) 1159 - 1162  2017.11  [Refereed]

  • Validity and reliability of Leap Motion Controller for assessing grasping and releasing finger movements

    Okazaki, Shuntaro, Muraoka, Yoshihiro, Suzuki, Risa

    Journal of Ergonomic Technology   17 ( 1 ) 32 - 42  2017.10  [Refereed]

     View Summary

    Objective: The leap motion controller (LMC) is a motion sensor that has recently become available and has advantages in terms of cost, size, and accuracy. However, it has not been fully investigated whether the LMC has sufficient accuracy for clinical assessments, particularly finger flexion and extension, which are important for diagnosis and prognosis in stroke or cerebral palsy patients. Herein, we have tested the validity and reliability of the LMC for measuring the grasp and release of finger movements.
    Materials and methods: A healthy participant repeated finger flexion and extension movements, and his fingertip position was measured using an LMC from the palmar, ulnar, and dorsal sides of the hand. The fingertip position was also measured using an electromagnetic motion tracker and a video. The finger movement detected by the LMC was compared with those detected by the other instruments.
    Conclusions: The LMC had a higher reliability in detecting the fingertip position by sensing it from the palmar or dorsal side of the hand, compared with the ulnar side. In the palmar/dorsal side measurements, an underestimation in the amplitude of the finger movement was shown in the middle range of its excursion compared to video-detected movement. However, the underestimation resulted in a highly correlated, proportional bias, especially in the palmar-side measurement, and could be calibrated by a nonlinear regression analysis. The palmar side measurement was thus the most suitable for evaluating the finger flexion and extension. We concluded that by taking into consideration the range of excursion and appropriate calibration, the validity and reliability of the LMC is sufficient for the quantitative evaluation of finger flexion and extension in laboratory experiments and also in clinical settings.

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Books and Other Publications 【 display / non-display

  • Ⅱ. Itemized discussion of neurophysiology 2.Electridcal stimulation. B. How to use electrical stimulation?, In Clinical Neurophysiology in Rehabilitation Medicine Y. Masakado, O. Takahashi, Y. Muraoka, and J. Ushiba (ed)

    Ishio, Akiyo, Muraoka, Yoshihiro( Part: Contributor)

    CHUGAI-IGAKUSHA, Tokyo  2015

  • Clinical Neurophysiology for Rehabilitation Medicine,Y. Masakado, O. Takahashi, Y. Muraoka, and J. Ushiba (ed)

    Muraoka, Yoshihiro( Part: Joint editor)

    CHUGAI-IGAKUSHA, Tokyo  2015 ISBN: 9784498076785

  • Ⅱ. Itemized discussion of neurophysiology 2.Electridcal stimulation. A. What is electrical stimulation?, In Clinical Neurophysiology in Rehabilitation Medicine Y. Masakado, O. Takahashi, Y. Muraoka, and J. Ushiba (ed)

    Muraoka, Yoshihiro, Ishio, Akiyo( Part: Contributor)

    CHUGAI-IGAKUSHA, Tokyo  2015

  • Touch “Care”., In Dictionary of developmental psychology, Japan Society of Developmental Psychology (ed).

    Book Chapters, Muraoka, Yoshihiro( Part: Contributor)

    MARUZEN-YUSHODO Co., Ltd., Tokyo  2013 ISBN: 9784621085790

  • Biofeedback. In: Clinical physical therapy manual 2 editionedition, Y. Kurokawa, H Itoh, K. Watanabe, H. Nagasawa, K. Yokota, F. Etoh (ed),

    Book Chapters, Muraoka, Yoshihiro( Part: Contributor)

    Nankodo Co., Ltd., Tokyo  2007

Misc 【 display / non-display

  • 座位中の足関節角度がヒラメ筋2シナプス性Ia相反抑制およびIaシナプス前抑制に与える影響

    村岡 慶裕, 國谷 真由, 鈴木 里砂, 岡崎 俊太郎

    臨床神経生理学   45 ( 5 ) 424 - 424  2017.10

  • 嚥下音および舌骨上筋群筋電同時計測による小型低コストバイオフォードバック装置

    岡崎 俊太郎, 村岡 慶裕, 鈴木 里砂

    臨床神経生理学   45 ( 5 ) 468 - 468  2017.10

  • 脳卒中患者の前脛骨筋に対するスマートフォンを利用した簡易筋電図バイオフィードバック訓練の即時効果

    鈴木 里砂, 村岡 慶裕, 岡崎 俊太郎

    臨床神経生理学   45 ( 5 ) 470 - 470  2017.10

  • 座位中の足関節角度がヒラメ筋2シナプス性Ia相反抑制およびIaシナプス前抑制に与える影響

    村岡 慶裕, 國谷 真由, 鈴木 里砂, 岡崎 俊太郎

    臨床神経生理学   45 ( 5 ) 424 - 424  2017.10

  • 嚥下音および舌骨上筋群筋電同時計測による小型低コストバイオフォードバック装置

    岡崎 俊太郎, 村岡 慶裕, 鈴木 里砂

    臨床神経生理学   45 ( 5 ) 468 - 468  2017.10

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Research Projects 【 display / non-display

  • Development of clinical simple gait analysis system for hemiplegia

    Project Year :

    2014.04
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    2019.03
     

  • Development of implantable volitional controlled electrical stimulation device for treatment of facial paralysis

    Project Year :

    2011.04
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    2014.03
     

     View Summary

    For the treatment of established facial paralysis, we primary aimed to develop volitional controlled implantable functional electrical stimulation device. Design of electrical circuit which is minimized for implantation was optimised. Therefore, way of electrical supply to subcutaneously implanted device was searched. Especially non-touching charging system was aimed but fialed in the experimental settings. On the other hand, we investigated the utility of distal side of nerve stump for the innervation of transplanted muscle segment during free neurovascular muscle transfer with animal experimental model and clinical cases. The utility was confirmed both experimentally and clinically

  • Establishment of walking ability improvement program using the auditory rhythm

    Project Year :

    2011.04
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    2013.03
     

     View Summary

    We determined the effects of relative timing during locomotion control, as reflected by rhythm generation and changes in muscle activities, when young, community-based elderly, and hemiplegic persons walked at different paces, and investigated changes in their gait performance due to improvement of the relative timing. The results demonstrated that the relative timing remained unchanged for a certain walking form in healthy young persons and the elderly. In contrast, timing that was individualized according to the walking pace was observed and there was relative timing due to different walking speeds in the hemiplegic persons who presented with a decline in gait performance. After the hemiplegic persons repeatedly learned about individualized timing, their walking speed improved

  • The variations of head and neck flexion positions as a swallowing maneuver and the differences of effects of these postures on aspiration.

     View Summary

    Purpose: We studied about the Chin down maneuver which is a postural technique used widely for treatment of individuals with dysphagia. Chin down posture is, in terms of functional anatomy, a head and neck (capital and cervical) posture in the anterior-posterior direction. Therefore, there could be various combinations of head and neck positions. So we classified chin down postures functional anatomically into three postures: 1) head flexion on the neck (HF), 2) neck flexion (NF), 3) combination of head and neck flexion (HFNF), and investigated the differences of the effects of each posture.Methods: ten normal, healthy adults, eight dysphagia patients with water aspiration and/or pharyngeal residue ware recruited. Using Videofluorography, we compared the structural changes (distances between tongue base and posterior-pharyngeal wall, width of valleculae, laryngeal inlet) under the each head and neck position and swallowing movement (ex: onset time of swallowing reflex, distances of hyoid movement, and so on). Besides that, oropharyngeal structural differences were examined by the Videoendoscopy.Results : Results of normal, healthy adults showed below1. Distances between tongue base and posterior pharyngeal wall, width of valleculae, and width of laryngeal inlet were shortened under HF. NF and HFNF made no significant differences.2. The duration time of contacting tongue base and posterior pharyngeal wall were prolonged under HF. Other components of swallowing movement were not influenced by postural changes.3. The results of Patients data were similar to that of normal adults, but differences of oropharingeal structure and swallowing movements were not significant, because of individual variability : some had metatypical cervical spine, some had atrophy of pharynx and so on.4. We can not find only one chin down posture which was effective for dysphagic patients, patients with different problems need different types of chin down, so we should recognize differences of some kinds of chin down postures andDiscussion: we revealed that chin down posture as a swallowing maneuver has some variations and each posture have different effects on orophalyngeal structure. We think we should separate 3 kinds of chin down postures differently depending on patients's specific characteristicsIt is necessary more investigation about effects for patients by collecting more data

  • Development of volitional control transcutaneous electrical stimulator for restoring swallowing function

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Presentations 【 display / non-display

  • 磁気センサによる簡易歩行分析システムの開発に関する検討−三次元動作解析装置を用いた妥当性検証−

    第68回国立病院総合医学会 

    Presentation date: 2014.11

  • 断端硬さ測定装置の押し込み操作の差異が測定値へ与える影響〜シリコーン製サンプルによる調査〜

    第68回国立病院総合医学会 

    Presentation date: 2014.11

  • 免荷重測定機能付スプリングハンガーの開発

    第51回日本リハビリテーション医学会学術集会 

    Presentation date: 2014.06

  • 健常者における歩行時方向転換の運動戦略と体幹動揺

    第51回日本リハビリテーション医学会学術集会 

    Presentation date: 2014.06

  • 歩行の距離因子とその左右差の定量化に関する検討 −3次元磁気式位置計測システムを用いて−

    第51回日本リハビリテーション医学会学術集会 

    Presentation date: 2014.06

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Specific Research 【 display / non-display

  • 誘発筋電図による促通・抑制試験における最大振幅指標とRMS値指標の比較

    2011  

     View Summary

    ヒトの中枢神経系の特性を調べるために、MEP(運動誘発電位)やH波などの誘発筋電図がしばしば用いられている.これらの手法は、誘発筋電図を誘発するための試験刺激に先行して与えられる、ある一定の潜時をもった条件刺激や運動イメージにより変化する誘発筋電図を捉え、それを指標として特定部位あるいはシナプスの促通や抑制を調べる.誘発筋電図の変化を捉えるための指標としては、最大振幅値を用いる場合と、一定期間の積分値を用いる場合があるが、この両者の差異については検討されていない.両者で差異が存在した場合、これまで同一として扱われてきた試験結果について、用いた指標に応じた解釈が必要となるため、確認しておく必要がある.そこで、誘発筋電図による促通・抑制試験における最大振幅指標と一定期間の積分値(RMS値)指標を用いた場合の結果を比較することを目的とした.運動誘発電位の多くは、振幅方向に相似であることから、両者に差異は存在しないものと考えられる.記録データは、健常者5名の右側短母指外転筋(APB)のMEP波形を用いた.各被験者において運動イメージの異なる40試行分のMEP波形を取得した.被験者毎に磁気刺激後20msから50msの波形を切り出し、同一試行中の最大振幅指標(最大値‐最小値)と切り出し期間のRMS値指標を算出し、相関係数を求めた.相関係数は、各被験者において、(0.01、0.01、0.01、0.4、0.5)となり、相関は認められなかった.本研究より、今まで同一として扱われてきた最大振幅指標とRMS値は、誘発筋電図のうち少なくともAPBのMEPにおいては、大きな差異があり、別の解釈が必要であることが分かった.今後、積分期間による差異や別部位のMEP波形の差異、H反射などの別の誘発筋電図などにおいても調査し、差異の原因やそれぞれの指標における解釈の方法を検討する必要があるものと考えられた.

Overseas Activities 【 display / non-display

  • ミネソタ州医療機器産業拠点の現地調査とリハビリ機器に関する技術交流

    2017.03
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    2017.08

    アメリカ   メイヨ―クリニック

 

Syllabus 【 display / non-display

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Social Activities 【 display / non-display

  • 2013/12/5付 日本経済新聞 朝刊

    2013.12
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  • NHK総合テレビ 2011年9月4日(日) 午後9時00分〜9時49分

    2011.09
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  • NHKデジタルBS Hi 2010年10月3日18:45-19:29

    2010.10
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  • 健康雑誌「わかさ」、2010年6月号、pp66-68、わかさ出版

    2010.06
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  • Medical Tribune 2010年5月13日pp.28-29、株式会社メディカルトリビューン

    2010.05
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