The neural generators of the mismatch responses to Mandarin lexical tones: An MEG study

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題名:	The neural generators of the mismatch responses to Mandarin lexical tones: An MEG study
作者:	徐峻賢;Hsu, Chun-Hsien;Lin, Sheng-Kai;Hsu, Yuan-Yu;Lee, Chia-Ying
貢獻者:	生醫理工學院認知神經科學研究所
關鍵詞:	Acoustic Stimulation;Acoustics;Adolescent;Adult;Alpha band;Alpha Rhythm - physiology;Auditory Perception - physiology;Biological and medical sciences;Brain;Brain - physiology;Brain Mapping;China;Evoked Potentials - physiology;Female;Frontal lobe;Fundamental and applied biological sciences. Psychology;Humans;Language;Lateralization;Magnetic mismatch field;Magnetic mismatch negativity (MMNm);Magnetoencephalography;Male;Mandarin;Mandarin lexical tones;Neurology;Signal Processing, Computer-Assisted;Speech Acoustics;Syllables;Theta band;Theta Rhythm - physiology;Time frequency responses;Tone;Vertebrates: nervous system and sense organs;Young Adult
日期:	2014-01-01
上傳時間:	2026-04-23 14:43:18 (UTC+8)
出版者:	Elsevier;Amsterdam: Elsevier B.V
摘要:	摘要： The present magnetoencephalography study used the cortically constrained minimum-norm estimates of human brain activity to elucidate functional roles of neural generators for detecting different magnitudes of lexical tones changes. A multiple-deviant oddball paradigm was used in which the syllable “yi” with a low-dipping tone (T3) was the common standard sound and the same syllable with a high-level tone (T1) or a high-rising tone (T2) were the large and small deviant sounds, respectively. The data revealed a larger magnetic mismatch field (MMNm) for large deviant in the left hemisphere. The source analysis also confirmed that the MMNm to lexical tone changes was generated in bilateral superior temporal gyri and only the large deviant revealed left lateralization. A set of frontal generators was activated at a later time and revealed differential sensitivities to the degree of deviance. The left anterior insula, the right anterior cingulate cortex, and the right ventral orbital frontal cortex were activated when detecting a large deviant, whereas the right frontal-opercular region was sensitive to the small deviant. These frontal generators were thought to be associated with various top-down mechanisms for attentional modulation. The time frequency (TF) analysis showed that large deviants yielded large theta band (5–7Hz) activity over the left anterior scalp and the left central scalp, while small deviants yielded large alpha band activity (9–11Hz) over the posterior scalp. The results of TF analyses implied that mechanisms of working memory and functional inhibition involved in the processes of acoustic change detection. •Native Mandarin speaker’s MMNm to lexical tone is mainly left lateralized in STG.•A set of frontal generators was found in response to large deviants.•The right pars opercularis was particular sensitive to small deviants.•Large deviants yielded large theta band activity.•Small deviants yielded large alpha band activity. 其他題名： Brain Res 出版者： Amsterdam: Elsevier B.V 出版日期： 2014-09-25 出處： Brain research, 2014-09, Vol.1582 (Sep), p.154-166 版權： 2014 Elsevier B.V. 版權： Elsevier B.V. 版權： 2015 INIST-CNRS 版權： Copyright © 2014 Elsevier B.V. All rights reserved. 識別號： ISSN: 0006-8993 識別號： ISSN: 1872-6240 識別號： EISSN: 1872-6240 識別號： DOI: 10.1016/j.brainres.2014.07.023 識別號： PMID: 25064434 識別號： CODEN: BRREAP
顯示於類別:	[認知與神經科學研究所 ] 期刊論文

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