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There are two types of speed-changing conditions; one involves \u0027‘changes in actual movement velocity,\u0027\u0027 and the other is \u0027‘manipulation of video speed.\u0027\u0027 Previous studies have investigated the effects of these conditions separately, but to date, no study has directly investigated the differences between the effects of these conditions. In the \u0027‘movement velocity condition,\u0027\u0027 increased velocity is associated with increased muscle activity; however, this change of muscle activities is not shown in the \u0027‘video speed condition.\u0027\u0027 Therefore, a difference in the results obtained under these conditions could be considered to reflect a difference in muscle activity of actor in the video. The aim of the present study was to investigate the effects of different speed-changing conditions and spontaneous movement tempo (SMT) on the excitability of primary motor cortex (M1) during action observation, as assessed by motor-evoked potentials (MEPs) amplitudes induced by transcranial magnetic stimulation (TMS). A total of 29 healthy subjects observed a video clip of a repetitive index or little finger abduction movement under seven different speed conditions. The video clip in the movement velocity condition showed repetitive finger abduction movements made in time with an auditory metronome, at frequencies of 0.5, 1, 2, and 3 Hz. In the video speed condition, playback of the 1-Hz movement velocity condition video clip was modified to show movement frequencies of 0.5, 2, or 3 Hz (Hz-Fake). TMS was applied at the time of maximal abduction and MEPs were recorded from two right-hand muscles. There were no differences in M1 excitability between the movement velocity and video speed conditions. Moreover, M1 excitability did not vary across the speed conditions for either presentation condition. Our findings suggest that changing playback speed and actual differences in movement velocity do not differentially influence M1 excitability during observation of a simple action task, such as repetitive finger movement, and that it is not affected by SMT. 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Changing Artificial Playback Speed and Real Movement Velocity Do Not Differentially Influence the Excitability of Primary Motor Cortex during Observation of a Repetitive Finger Movement
http://hdl.handle.net/10069/38270
http://hdl.handle.net/10069/38270263b3f1b-3676-4b8a-8266-d8775974c04d
名前 / ファイル | ライセンス | アクション |
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Fnhum11_546.pdf (1.9 MB)
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Item type | 学術雑誌論文 / Journal Article(1) | |||||
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公開日 | 2018-06-06 | |||||
タイトル | ||||||
タイトル | Changing Artificial Playback Speed and Real Movement Velocity Do Not Differentially Influence the Excitability of Primary Motor Cortex during Observation of a Repetitive Finger Movement | |||||
言語 | ||||||
言語 | eng | |||||
キーワード | ||||||
主題Scheme | Other | |||||
主題 | Action observation | |||||
キーワード | ||||||
主題Scheme | Other | |||||
主題 | Mirror neuron system | |||||
キーワード | ||||||
主題Scheme | Other | |||||
主題 | Motor-evoked potentials | |||||
キーワード | ||||||
主題Scheme | Other | |||||
主題 | Movement velocity | |||||
キーワード | ||||||
主題Scheme | Other | |||||
主題 | Primary motor cortex | |||||
キーワード | ||||||
主題Scheme | Other | |||||
主題 | Transcranial magnetic stimulation | |||||
キーワード | ||||||
主題Scheme | Other | |||||
主題 | Video speed | |||||
資源タイプ | ||||||
資源タイプ識別子 | http://purl.org/coar/resource_type/c_6501 | |||||
資源タイプ | journal article | |||||
著者 |
Moriuchi, Takefumi
× Moriuchi, Takefumi× Matsuda, Daiki× Nakamura, Jirou× Matsuo, Takashi× Nakashima, Akira× Mitsunaga, Wataru× Hasegawa, Takashi× Ikio, Yuta× Koyanagi, Masahiko× Higashi, Toshio |
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抄録 | ||||||
内容記述タイプ | Abstract | |||||
内容記述 | Action observation studies have investigated whether changing the speed of the observed movement affects the action observation network. There are two types of speed-changing conditions; one involves '‘changes in actual movement velocity,'' and the other is '‘manipulation of video speed.'' Previous studies have investigated the effects of these conditions separately, but to date, no study has directly investigated the differences between the effects of these conditions. In the '‘movement velocity condition,'' increased velocity is associated with increased muscle activity; however, this change of muscle activities is not shown in the '‘video speed condition.'' Therefore, a difference in the results obtained under these conditions could be considered to reflect a difference in muscle activity of actor in the video. The aim of the present study was to investigate the effects of different speed-changing conditions and spontaneous movement tempo (SMT) on the excitability of primary motor cortex (M1) during action observation, as assessed by motor-evoked potentials (MEPs) amplitudes induced by transcranial magnetic stimulation (TMS). A total of 29 healthy subjects observed a video clip of a repetitive index or little finger abduction movement under seven different speed conditions. The video clip in the movement velocity condition showed repetitive finger abduction movements made in time with an auditory metronome, at frequencies of 0.5, 1, 2, and 3 Hz. In the video speed condition, playback of the 1-Hz movement velocity condition video clip was modified to show movement frequencies of 0.5, 2, or 3 Hz (Hz-Fake). TMS was applied at the time of maximal abduction and MEPs were recorded from two right-hand muscles. There were no differences in M1 excitability between the movement velocity and video speed conditions. Moreover, M1 excitability did not vary across the speed conditions for either presentation condition. Our findings suggest that changing playback speed and actual differences in movement velocity do not differentially influence M1 excitability during observation of a simple action task, such as repetitive finger movement, and that it is not affected by SMT. In simple and meaningless observational task, people might not be able to recognize the difference in muscle activity of actor in the video. | |||||
書誌情報 |
Frontiers in Human Neuroscience 巻 11, p. 546, 発行日 2017-11-13 |
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出版者 | ||||||
出版者 | Frontiers Media S.A. | |||||
EISSN | ||||||
収録物識別子タイプ | ISSN | |||||
収録物識別子 | 16625161 | |||||
DOI | ||||||
関連タイプ | isIdenticalTo | |||||
識別子タイプ | DOI | |||||
関連識別子 | 10.3389/fnhum.2017.00546 | |||||
権利 | ||||||
権利情報 | c 2017 Moriuchi, Matsuda, Nakamura, Matsuo, Nakashima, Mitsunaga, Hasegawa, Ikio, Koyanagi and Higashi. This is an open-access article distributed under the terms of the Creative Commons Attribution License (CC BY). The use, distribution or reproduction in other forums is permitted, provided the original author(s) or licensor are credited and that the original publication in this journal is cited, in accordance with accepted academic practice. No use, distribution or reproduction is permitted which does not comply with these terms. | |||||
著者版フラグ | ||||||
出版タイプ | VoR | |||||
出版タイプResource | http://purl.org/coar/version/c_970fb48d4fbd8a85 | |||||
引用 | ||||||
内容記述タイプ | Other | |||||
内容記述 | Frontiers in Human Neuroscience, 11, 546; 2018 |