Ushiyama, Junichi

写真a

Affiliation

Faculty of Environment and Information Studies (Shonan Fujisawa)

Position

Associate Professor

E-mail Address

E-mail address

Related Websites

External Links

Other Affiliation 【 Display / hide

  • School of Medicine, リハビリテーション医学, Common Associate Professor

Career 【 Display / hide

  • 2002.04
    -
    2005.03

    Keio University, Faculty of Policy Management, Part-time Lecturer

  • 2005.04
    -
    2007.03

    Keio University, Institute of Physical Education, Instructor

  • 2007.04
    -
    2010.03

    Keio University, Institute of Physical Education, Instructor

  • 2010.04
    -
    2011.03

    Keio University School of Medicine, Department of Rehabilitation Medicine, Project Instructor

  • 2011.04
    -
    2013.03

    Keio University School of Medicine, Department of Rehabilitation Medicine, Project Instructor

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Academic Background 【 Display / hide

  • 1996.04
    -
    2000.03

    Keio University, Faculty of Environmental Information

    University, Graduated

  • 2000.04
    -
    2002.03

    The University of Tokyo, Graduate School of Arts and Sciences, Department of Life Sciences

    Graduate School, Completed, Master's course

  • 2002.04
    -
    2005.03

    The University of Tokyo, Graduate School of Arts and Sciences, Department of Life and Sciences

    Graduate School, Completed, Doctoral course

Academic Degrees 【 Display / hide

  • Ph.D. in Life Sciences, The University of Tokyo, Coursework, 2005.03

  • MS in Life Sciences, The University of Tokyo, Coursework, 2002.03

  • Ph.D. in Medicine, Keio University, 2013.10

 

Research Areas 【 Display / hide

  • Sports science (Sports Science)

  • Nerve/Muscular Physiology

 

Papers 【 Display / hide

  • Subjective vividness of kinesthetic motor imagery is associated with the similarity in magnitude of sensorimotor event-related desynchronization between motor execution and motor imagery

    Toriyama H., Ushiba J., Ushiyama J.

    Frontiers in Human Neuroscience (Frontiers in Human Neuroscience)  12 2018.07

     View Summary

    © 2018 Toriyama, Ushiba and Ushiyama. In the field of psychology, it has been well established that there are two types of motor imagery such as kinesthetic motor imagery (KMI) and visual motor imagery (VMI), and the subjective evaluation for vividness of motor imagery each differs across individuals. This study aimed to examine how the motor imagery ability assessed by the psychological scores is associated with the physiological measure using electroencephalogram (EEG) sensorimotor rhythm during KMI task. First, 20 healthy young individuals evaluated subjectively how vividly they can perform each of KMI and VMI by using the Kinesthetic and Visual Imagery Questionnaire (KVIQ). We assessed their motor imagery abilities by summing each of KMI and VMI scores in KVIQ (KMItotal and VMItotal). Second, in physiological experiments, they repeated two strengths (10 and 40% of maximal effort) of isometric voluntary wrist-dorsiflexion. Right after each contraction, they also performed its KMI. The scalp EEGs over the sensorimotor cortex were recorded during the tasks. The EEG power is known to decrease in the alpha-and-beta band (7–35 Hz) from resting state to performing state of voluntary contraction (VC) or motor imagery. This phenomenon is referred to as event-related desynchronization (ERD). For each strength of the tasks, we calculated the maximal peak of ERD during VC, and that during its KMI, and measured the degree of similarity (ERDsim) between them. The results showed significant negative correlations between KMItotal and ERDsim for both strengths (p < 0.05) (i.e., the higher the KMItotal, the smaller the ERDsim). These findings suggest that in healthy individuals with higher motor imagery ability from a first-person perspective, KMI efficiently engages the shared cortical circuits corresponding with motor execution, including the sensorimotor cortex, with high compliance.

  • Corticomuscular coherence reflects somatosensory feedback gains during motor adaptation

    Kasuga S., Momose N., Ushiyama J., Ushiba J.

    Neuroscience Research (Neuroscience Research)  131   10 - 18 2018.06

    ISSN  01680102

     View Summary

    © 2017 Beta-band corticomuscular coherence (CMC) observed between the sensorimotor cortex activity and contracting muscle is declaratively described as a neurophysiological reflection of sensorimotor binding. However, much remains unknown about the functional meaning of ‘sensorimotor binding.’ The efficacy of information binding in the sensorimotor system is assumed to be influenced by the gain of the feedback controller, which is regulated through a process that may in part be implemented in the primary sensorimotor cortex (SM1). Thus, we predicted that CMC is modulated together with feedback gains during motor learning. We examined this hypothesis using a hand-reaching adaptation task under a novel dynamical environment. CMC modulation was assessed before and after adaptation, and feedback gains were probed by long latency triggered muscle reactions. Overall, we found that CMC significantly decreased during the adaptation period, and such CMC decrease was associated with the decreased long latency reflexes. These results suggest that CMC has a related function to modulation of feedback gains. Our findings provided an electrophysiological hallmark of the sensorimotor binding process, which was stated as a function of CMC but poorly understood.

  • Individual difference in β-band corticomuscular coherence and its relation to force steadiness during isometric voluntary ankle dorsiflexion in healthy humans

    USHIYAMA JUNICHIYamada Junya , Liu Meigen , Ushiba Junichi

    Clinical Neurophysiology 128 ( 2 ) 303 - 311 2017

  • Inhibitory interneuron circuits at cortical and spinal levels are associated with individual differences in corticomuscular coherence during isometric voluntary contraction.

    Matsuya R, Ushiyama J, Ushiba J

    Scientific Reports  7:44417 2017

  • 人間工学のための計測手法 第4部:生体電気現象その他の計測と解析(3)—脳機能の非侵襲計測法:EEG,fMRI,fNIRS—

    牛山 潤一武田湖太郎, 岡崎俊太郎

    人間工学 51 ( 6 ) 411 - 419 2015.12

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Reviews, Commentaries, etc. 【 Display / hide

  • 書評:開一夫・金山範明(編),河内山隆紀・松本敦・宮腰誠(著)(2016).『脳波解析入門 EEGLABとSPMを使いこなす』.東京:東京大学出版会

    牛山潤一

    認知科学 24   261 - 262 2017

  • 脳機能の非侵襲計測法:EEG, fMRI, fNIRS

    武田湖太郎,岡崎俊太郎,牛山潤一

    人間工学 51   411 - 419 2015

  • 脳波

    牛山潤一

    神経科学の最前線とリハビリテーション 脳の可塑性と運動(里宇明元・牛場潤一 監修)     84 - 87 2015

  • Oscillatory corticomuscular coupling as a determinant of motor precision and quickness

    Ushiyama J

    Advance in Exercise and Sports Physiology  19   25 - 31 2013

  • Resonance between cortex and muscle

    Ushiyama J, Ushiba J

    Clinical Neurophysiology 124    5 - 7 2013

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Presentations 【 Display / hide

  • 不活動中のレジスタンストレーニングが muscle functional MRI に及ぼす影響

    秋間広,牛山潤一,久保潤二郎,伊藤雅充,金久博昭,福永哲夫.

    第56回日本体力医学会 (宮城) , 2001.09, Poster (general)

  • アキレス腱への長時間機械的振動刺激が随意最大筋力発揮における足底屈筋群の筋活動に及ぼす影響.

    牛山潤一,神崎素樹,政二慶,金久博昭,福永哲夫.

    第56回日本体力医学会 (宮城) , 2001.09, Poster (general)

  • 随意最大筋力発揮におけるガンマ環の貢献およびその協働筋間での比較

    牛山潤一,神崎素樹,政二慶,金久博昭,福永哲夫.

    第57回日本体力医学会 (高知) , 2002.09, Poster (general)

  • 腓腹筋の筋活動ならびに筋線維長変化がヒラメ筋H反射に与える影響.

    牛山潤一,若原卓,神﨑素樹,村岡哲郎,政二慶,金久博昭,福永哲夫.

    第54回日本体育学会 (熊本) , 2003.09, Oral Presentation(general)

  • Ia群線維活動からみた筋疲労.

    神﨑素樹,牛山潤一

    日本体育学会東京支部第2回研究会 (東京) , 2003.11, Oral Presentation(guest/special)

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Research Projects of Competitive Funds, etc. 【 Display / hide

  • Understanding adaptation process of human bodily movements in accordance with various task contexts by means of corticomuscular coherence

    2020.04
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    2025.03

    MEXT,JSPS, Grant-in-Aid for Scientific Research, 牛山 潤一, Grant-in-Aid for Scientific Research (B), Principal Investigator

  • 運動誤差の修正に関わる感覚運動統合の機序を脳波筋電図コヒーレンスから解明する

    2016.04
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    2019.03

    MEXT,JSPS, Grant-in-Aid for Scientific Research, 牛山 潤一, Grant-in-Aid for Challenging Exploratory Research, Principal Investigator

Awards 【 Display / hide

  • 東京体育学奨励賞

    USHIYAMA JUNICHI, 2004.03, 腓腹筋の筋活動ならびに筋線維長変化がヒラメ筋運動ニューロンの興奮性に与える影響

    Type of Award: Awards of National Conference, Council and Symposium

 

Courses Taught 【 Display / hide

  • SPECIAL RESEARCH PROJECT B

    2021

  • SEMINAR A

    2021

  • NEURAL COMMUNICATION

    2021

  • MOVEMENT PHYSIOLOGY AND PSYCHOLOGY

    2021

  • MASTER SEMINAR

    2021

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