Neural signatures of lexical tone reading

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• 作者：Veronica P.Y. Kwok ; Tianfu Wang ; Siping Chen ; Kofi Yakpo ; Linlin Zhu ; Peter T. Fox and Li Hai Tan
• 关键词：functional magnetic resonance imaging ; language ; pitch ; prosody ; temporal cortex ; activation likelihood estimation
• 刊名：Human Brain Mapping
• 出版年：2015
• 出版时间：January 2015
• 年：2015
• 卷：36
• 期：1
• 页码：304-312
• 全文大小：467K
• ISSN：1097-0193

文摘

Research on how lexical tone is neuroanatomically represented in the human brain is central to our understanding of cortical regions subserving language. Past studies have exclusively focused on tone perception of the spoken language, and little is known as to the lexical tone processing in reading visual words and its associated brain mechanisms. In this study, we performed two experiments to identify neural substrates in Chinese tone reading. First, we used a tone judgment paradigm to investigate tone processing of visually presented Chinese characters. We found that, relative to baseline, tone perception of printed Chinese characters were mediated by strong brain activation in bilateral frontal regions, left inferior parietal lobule, left posterior middle/medial temporal gyrus, left inferior temporal region, bilateral visual systems, and cerebellum. Surprisingly, no activation was found in superior temporal regions, brain sites well known for speech tone processing. In activation likelihood estimation (ALE) meta-analysis to combine results of relevant published studies, we attempted to elucidate whether the left temporal cortex activities identified in Experiment one is consistent with those found in previous studies of auditory lexical tone perception. ALE results showed that only the left superior temporal gyrus and putamen were critical in auditory lexical tone processing. These findings suggest that activation in the superior temporal cortex associated with lexical tone perception is modality-dependent. Hum Brain Mapp, 36:304–312, 2015.