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Effects of musical experience on different components of MEG responses elicited by sequential piano-tones and chords

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タイトル: Effects of musical experience on different components of MEG responses elicited by sequential piano-tones and chords
著者: Kuriki, Shinya 著作を一覧する
Kanda, Satoshi 著作を一覧する
Hirata, Yoshihiro 著作を一覧する
キーワード: auditory cortex
evoked responses
magnetoencephalography
plasticity
refractory effect
localization
発行日: 2006年 4月12日
出版者: Society for Neuroscience
誌名: The Journal of Neuroscience
巻: 26
号: 15
開始ページ: 4046
終了ページ: 4053
出版社 DOI: 10.1523/JNEUROSCI.3907-05.2006
抄録: Magnetoencephalographic (MEG) studies have revealed enhancement of neural activity of the N1m response of auditory evoked fields in long-term trained musicians, reflecting neuroplastic modification of the representation of the auditory cortex. In contrast, the amplitude of the P2 response of auditory evoked potentials is modified by musical experience, with no alteration of N1. Here, we performed a comprehensive MEG study using stimulation of successive musical-instrument tones to examine how the neural activities of different MEG responses are modified in long-term experienced musicians who commenced musical lessons at ages of ~5 years and had continued to practice. The dipole moment of the P2m response occurring at 160–180 ms was significantly enlarged in musicians compared with that in individuals who had not received musical lessons. The enlargement was found for the dipole moment of N1m occurring at 100–120 ms in a restricted condition but not for the moment of P1m at 50–60 ms. Furthermore, the dipole moment of P2m for successive stimuli, normalized by the moment for the first stimulus, was significantly larger for chord tones than single tones and was significantly larger in the musicians than controls. These results suggest that the P2m response is susceptible to be modified by musical training in a period of neural maturation, with a short refractory period of neural activity for the auditory input of composite tones. The P2m activity may be specialized to the processing of multifrequency sounds, such as musical timbre consisting of abundant harmonics.
Rights: Copyright © 2006 by Society for Neuroscience
資料タイプ: article
URI: http://hdl.handle.net/2115/13460
出現コレクション:雑誌発表論文等 (Peer-reviewed Journal Articles, etc)

提供者: 栗城眞也

 

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