Cortical Dynamics of Acoustic and Phonological Processing in Speech Perception

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	Cortical Dynamics of Acoustic and Phonological Processing in Speech Perception
	Zhang, Linjun 1,2; Xi, Jie1,3 ; Xu, Guoqing 4; Shu, Hua 1; Wang, Xiaoyi 5; Li, Ping 6,7
刊名	PLOS ONE
	2011-06-13
卷号	6 期号:6
ISSN号	1932-6203
通讯作者	Zhang, LJ (reprint author), Beijing Normal Univ, State Key Lab Cognit Neurosci & Learning, Beijing 100875, Peoples R China.
产权排序	3
英文摘要	In speech perception, a functional hierarchy has been proposed by recent functional neuroimaging studies: Core auditory areas on the dorsal plane of superior temporal gyrus (STG) are sensitive to basic acoustic characteristics, whereas downstream regions, specifically the left superior temporal sulcus (STS) and middle temporal gyrus (MTG) ventral to Heschl's gyrus (HG) are responsive to abstract phonological features. What is unclear so far is the relationship between the dorsal and ventral processes, especially with regard to whether low-level acoustic processing is modulated by high-level phonological processing. To address the issue, we assessed sensitivity of core auditory and downstream regions to acoustic and phonological variations by using within-and across-category lexical tonal continua with equal physical intervals. We found that relative to within-category variation, across-category variation elicited stronger activation in the left middle MTG (mMTG), apparently reflecting the abstract phonological representations. At the same time, activation in the core auditory region decreased, resulting from the top-down influences of phonological processing. These results support a hierarchical organization of the ventral acoustic-phonological processing stream, which originates in the right HG/STG and projects to the left mMTG. Furthermore, our study provides direct evidence that low-level acoustic analysis is modulated by high-level phonological representations, revealing the cortical dynamics of acoustic and phonological processing in speech perception. Our findings confirm the existence of reciprocal progression projections in the auditory pathways and the roles of both feed-forward and feedback mechanisms in speech perception.
学科主题	Perception psychology
收录类别	SCI
项目简介	The research was supported by the Program for Changjiang Scholars and Innovative Research Team in University (IRT0710, http://www.cksp.edu.cn/index.php), by grants from the Natural Science Foundation of China (30870758, http://www.nsfc.gov.cn/Portal0/default124.htm), by grants from the Natural Science Foundation of Beijing (7092051, http://www.bjnsf.org/) to HS, and the Fund for Foreign Scholars in University Research and Teaching Programs (B07008, http://www.bjnsf.org/) to PL and HS. The funders had no role in study design, data collection and analysis, decision to publish, or preparation of the manuscript.
原文出处	http://blclab.org/wp-content/uploads/2013/02/zhang_etal_pone.pdf
语种	英语
WOS记录号	WOS:000291663300033
内容类型	期刊论文
源URL	[http://ir.psych.ac.cn/handle/311026/11455]
专题	心理研究所_中国科学院心理健康重点实验室
作者单位	1.Beijing Normal Univ, State Key Lab Cognit Neurosci & Learning, Beijing 100875, Peoples R China 2.Beijing Language & Culture Univ, Coll Chinese Studies, Beijing, Peoples R China 3.Chinese Acad Sci, Inst Psychol, Beijing 100101, Peoples R China 4.Dalian Med Univ, Dept Psychol, Dalian, Peoples R China 5.Capital Med Univ, Xuanwu Hosp, Dept Radiol, Beijing, Peoples R China 6.Penn State Univ, Dept Psychol, University Pk, PA 16802 USA 7.Penn State Univ, Ctr Language Sci, University Pk, PA 16802 USA
推荐引用方式 GB/T 7714	Zhang, Linjun,Xi, Jie,Xu, Guoqing,et al. Cortical Dynamics of Acoustic and Phonological Processing in Speech Perception[J]. PLOS ONE,2011,6(6).
APA	Zhang, Linjun,Xi, Jie,Xu, Guoqing,Shu, Hua,Wang, Xiaoyi,&Li, Ping.(2011).Cortical Dynamics of Acoustic and Phonological Processing in Speech Perception.PLOS ONE,6(6).
MLA	Zhang, Linjun,et al."Cortical Dynamics of Acoustic and Phonological Processing in Speech Perception".PLOS ONE 6.6(2011).