Neural representations of concurrent sounds with overlapping spectra in   rat inferior colliculus: Comparisons between temporal-fine structure and   envelope

doi:10.1016/j.heares.2017.06.005

CORC > 北京大学 > 心理与认知科学学院

	Neural representations of concurrent sounds with overlapping spectra in rat inferior colliculus: Comparisons between temporal-fine structure and envelope
	Luo, Lu ; Wang, Qian ; Li, Liang
刊名	HEARING RESEARCH
	2017
关键词	Binaural unmasking Envelope Frequency-following response Inferior colliculus Sound segregation Temporal fine structure FREQUENCY-FOLLOWING RESPONSES INTERAURAL TIME DIFFERENCES AUDITORY BRAIN-STEM AMPLITUDE-MODULATED TONES SPATIAL RELEASE NORMAL-HEARING SPEECH-PERCEPTION COCKTAIL-PARTY STRUCTURE INFORMATION RELATIVE CONTRIBUTION
DOI	10.1016/j.heares.2017.06.005
英文摘要	Perceptual segregation of multiple sounds, which overlap in both time and spectra, into individual auditory streams is critical for hearing in natural environments. Some cues such as interaural time disparities (ITDs) play an important role in the segregation, especially when sounds are separated in space. In this study, we investigated the neural representation of two uncorrelated narrowband noises that shared the identical spectrum in the rat inferior colliculus (IC) using frequency-following-response (FFR) recordings, when the ITD for each noise stimulus was manipulated. The results of this study showed that recorded FFRs exhibited two distinctive components: the fast-varying temporal fine structure (TFS) component (FFRTFS) and the slow-varying envelope component (FFRENv). When a single narrowband noise was presented alone, the FFRTFS, but not the FFRENv, was sensitive to ITDs. When two narrowband noises were presented simultaneously, the FFRTFS took advantage of the ITD disparity that was associated with perceived spatial separation between the two concurrent sounds, and displayed a better linear synchronization to the sound with an ipsilateral-leading ITD. However, no effects of ITDs were found on the FFRENv. These results suggest that the FFRTFS and FFRENv represent two distinct types of signal processing in the auditory brainstem and contribute differentially to sound segregation based on spatial cues: the FFRTFS is more critical to spatial release from masking. (C) 2017 Elsevier B.V. All rights reserved.; National Natural Science Foundation of China [31470987]; Peking University; SCI(E); SSCI; ARTICLE; 87-96; 353
语种	英语
内容类型	期刊论文
源URL	[http://ir.pku.edu.cn/handle/20.500.11897/468979]
专题	心理与认知科学学院信息科学技术学院
推荐引用方式 GB/T 7714	Luo, Lu,Wang, Qian,Li, Liang. Neural representations of concurrent sounds with overlapping spectra in rat inferior colliculus: Comparisons between temporal-fine structure and envelope[J]. HEARING RESEARCH,2017.
APA	Luo, Lu,Wang, Qian,&Li, Liang.(2017).Neural representations of concurrent sounds with overlapping spectra in rat inferior colliculus: Comparisons between temporal-fine structure and envelope.HEARING RESEARCH.
MLA	Luo, Lu,et al."Neural representations of concurrent sounds with overlapping spectra in rat inferior colliculus: Comparisons between temporal-fine structure and envelope".HEARING RESEARCH (2017).