Functional neuroanatomy of speech processing within the temporal cortex
Functional neuroanatomy of speech processing within the temporal cortex
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DOI：
10.1097/wnr.0b013e3282f03f39
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发表时间：
2007-10-08
期刊：
影响因子：
1.7
通讯作者：
Ogawa, Seiji
中科院分区：
文献类型：
--
作者：
Hara, Nobuko F.;Nakamura, Kimihiro;Ogawa, Seiji
母语的音位结构决定了人们对言语信号的感知方式。一个典型的例子是，母语为日语的听众将两个英语音素/r/和/i/映射到同一个/R/上。这种对语音的知觉同化与左侧和/或右侧后视神经周围区有关，但确切的功能解剖尚不清楚。使用功能磁共振成像和重复启动范式，我们在左侧颞叶皮质识别出三个亚区：对语言特定的语音知识敏感的前部，以及与其他发声刺激特征相关的中外侧和后部。动态因果模型支持前通路处理知觉同化，后通路处理词汇语义信息的模式。
The phonemic structure of the maternal language determines the way of perceiving speech signals. A typical example is that native Japanese listeners map two English phonemes, /r/ and /I/, onto the same /R/. This perceptual assimilation of speech sounds has been associated with the left and/or right posterior perisylvian region, but the precise functional anatomy is unknown. Using functional magnetic resonance imaging and a repetition priming paradigm, we identified three subregions in the left temporal cortex: an anterior division sensitive to language-specific phonological knowledge, and a midlateral and a posterior division related to other vocal stimuli features. Dynamic causal modeling supports the scheme by which the anterior pathway processes perceptual assimilation; the posterior pathway processes lexico-semantic information.