Publication in refereed journal
香港中文大学研究人员 ( 现职)
| 黄俊文教授 (语言学及现代语言系) |
全文
| 数位物件识别号 (DOI) http://dx.doi.org/10.3389/fnhum.2014.01029 |
引用次数
Web of Sciencehttp://aims.cuhk.edu.hk/converis/portal/Publication/13WOS source URL
其它资讯
摘要Congenital amusia is a neurodevelopmental disorder of musical processing that also impacts subtle aspects of speech processing. It remains debated at what stage(s) of auditory processing deficits in amusia arise. In this study, we investigated whether amusia originates from impaired subcortical encoding of speech On quiet and noise) and musical sounds in the brainstem. Fourteen Cantonese-speaking amusics and 14 matched controls passively listened to six Cantonese lexical tones in quiet, two Cantonese tones in noise (signal-to-noise ratios at 0 and 20 dB), and two cello tones in quiet while their frequency-following responses (FFRs) to these tones were recorded. All participants also completed a behavioral lexical tone identification task. The results indicated normal brainstem encoding of pitch in speech On quiet and noise) and musical stimuli in amusics relative to controls, as measured by FFR pitch strength, pitch error, and stimulus-to-response correlation. There was also no group difference in neural conduction time or FFR amplitudes. Both groups demonstrated better FFRs to speech On quiet and noise) than to musical stimuli. However, a significant group difference was observed for tone identification, with amusics showing significantly lower accuracy than controls. Analysis of the tone confusion matrices suggested that amusics were more likely than controls to confuse between tones that shared similar acoustic features. Interestingly, this deficit in lexical tone identification was not coupled with brainstem abnormality for either speech or musical stimuli. Together, our results suggest that the amusic brainstem is not functioning abnormally, although higher-order linguistic pitch processing is impaired in amusia. This finding has significant implications for theories of central auditory processing, requiring further investigations into how different stages of auditory processing interact in the human brain.
着者Liu F, Maggu AR, Lau JCY, Wong PCM
期刊名称Frontiers in Human Neuroscience
出版年份2015
月份1
日期6
卷号8
出版社FRONTIERS RESEARCH FOUNDATION
国际标準期刊号1662-5161
语言英式英语
关键词brainstem; Cantonese; congenital amusia; frequency-following response (FFR); lexical/musical tone; pitch; speech in noise
Web of Science 学科类别Neurosciences; Neurosciences & Neurology; Psychology
