研究者詳細 - 藤井　進也

論文 - 藤井　進也

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Rise Rate and Timing Variability of Surface Electromyographic Activity during Rhythmic Drumming Movements in the World's Fastest Drummer

Fujii S, Moritani T

Journal of Electromyography and Kinesiology （Elsevier） 22 （ 1 ） 60 - 66 2012年02月

研究論文（学術雑誌）, 共著, 査読有り, ISSN 1050-6411

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Neurophysiological and Dynamical Control Principles Underlying Variable and Stereotyped Movement Patterns During Motor Skill Acquisition

Kazutoshi Kudo, Makoto Miyazaki, Hirofumi Sekiguchi, Hiroshi Kadota, Shinya Fujii, Akito Miura, Michiko Yoshie, Hiroki Nakata

Journal of Advanced Computational Intelligence and Intelligent Informatics （Fuji Technology Press Ltd.） 15 （ 8 ） 942 - 953 2011年10月

査読有り, ISSN 1343-0130

While novices who are unfamiliar to a new motor skill typically show variable and unstable movements, highly skilled experts show a stable and accurate performance. These distinct differences in motor control between experts and novices have led researchers to hypothesize that neuromotor noise is reduced in the process of motor skill acquisition. On the other hand, it should be noted that novices’ movements have other characteristics; they are habituated and stereotyped. In this review, we discuss the principles governing spatiotemporal organization of movements in novices and experts while solving specific motor problems under varied conditions, by introducing experimental and theoretical studies that use neurophysiological techniques such as electromyography, functional magnetic resonance imaging, and transcranial magnetic stimulation, and mathematical models such as stochastic and dynamical models. On the basis of the findings from a variety of perceptual-motor skills (e.g., ballthrowing, badminton smash, long-distance running, piano and drum performance, street dance, a popular hand game of rock-paper-scissors, and temporal order judgement task), we argue that the novices’ characteristic movement patterns were organized under specific constraints and typical strategy, without which the variability would increase even more, while experts’ movements were organized with functional and compensatory variability that can drive out erroneous noise variability. We also showed that in a particular type of interlimb coordination, skilled and unskilled movement patterns could be seamlessly described as the time evolution of nonlinear and self-organized dynamical systems, suggesting that the dynamical systems approach is a major candidate for understanding the principle underlying organization of experts’ and novices’ movements.

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Synchronization Error of Drum Kit Playng with a Metronome at Different Tempi by Professional Drummers

Fujii S, Hirashima M, Kudo K, Ohtsuki T, Nakamura Y, Oda S

Music Perception （University of California Press） 28 （ 1 ） 491 - 503 2011年06月

研究論文（学術雑誌）, 共著, 査読有り, ISSN 0730-7829

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Neurophysiological and Dynamical Control Principles underlying Variable and Stereotyped Movement Patterns during Skill Acquisition

Kudo K, Miyazaki M, Sekiguchi H, Kadota H, Fujii S, Miura A, Yoshie M, & Nakata H

Journal of Advanced Computational Intelligence and Intelligent Informatics （Fuji Technology Press Ltd.） 15 942 - 953 2011年

研究論文（学術雑誌）, 共著, 査読有り

Intrinsic Constraint of Asymmetry Acting as a Control Parameter on Rapid, Rhythmic Bimanual Coordination: A Study of Professional Drummers and Non-drummers

Fujii S, Kudo K, Ohtsuki T, Oda S

Journal of Neurophysiology （American Physiological Society） 104 （ 4 ） 2178 - 2186 2010年10月

研究論文（学術雑誌）, 共著, 査読有り, ISSN 0022-3077

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SPATIOTEMPORAL CHARACTERISTICS OF RHYTHMIC, STATIONARY BASKETBALL BOUNCING IN SKILLED AND UNSKILLED PLAYERS

Yoji Katsuhara, Shinya Fuji, Ryosuke Kametani, Shingo Oda

PERCEPTUAL AND MOTOR SKILLS （AMMONS SCIENTIFIC, LTD） 110 （ 2 ） 469 - 478 2010年04月

査読有り, ISSN 0031-5125

The aim of this study was to investigate the spatiotemporal characteristics of rhythmic, stationary basketball bouncing in skilled and unskilled adult basketball players. Skilled (n=12) and unskilled (n=11) basketball players were asked to bounce a basketball every 700 msec. in as temporally stable and spatially accurate a manner as possible, while keeping their eyes fixed straight ahead. Spatial analyses revealed a lower variability of the ball bouncing point and less deviation from a target point in the performance of skilled players compared to unskilled players. Temporal analyses revealed no significant difference in variability of the interbounce interval in skilled versus unskilled players. However, skilled players had longer and more consistent contact time between hand and ball compared to the unskilled players. These results suggest that longer and more consistent hand contact with the ball play an important role in spatial control of basketball bouncing position.