Neural substrates of phonemic perception
Neural substrates of phonemic perception
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DOI：
10.1093/cercor/bhi040
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发表时间：
2005-10-01
期刊：
影响因子：
3.7
通讯作者：
Medler, DA
中科院分区：
文献类型：
--
作者：
Liebenthal, E;Binder, JR;Medler, DA
左半球的颞叶长期以来一直与语音的感知有关。然而，关于语音信号分析中不同时间区域的具体功能知之甚少。在这里，我们表明，一个区域延伸沿着左中和前上级颞沟（STS）是更熟悉的辅音-元音音节在听觉辨别任务比复杂的听觉模式，不能与学习的音素类别。与此相反，两侧的背侧上级颞回区域，靠近初级听觉皮层，被音素和非音素声音激活的程度相同。因此，左中/前STS似乎在音素感知中发挥作用。它可能代表了一个中间阶段的处理功能通路连接区域在双侧背侧上级颞回，大概涉及的语音和其他复杂的非语音声音的物理特征的分析，在左前STS和颞中回，从事更高层次的语言过程。
The temporal lobe in the left hemisphere has long been implicated in the perception of speech sounds. Little is known, however, regarding the specific function of different temporal regions in the analysis of the speech signal. Here we show that an area extending along the left middle and anterior superior temporal sulcus (STS) is more responsive to familiar consonant-vowel syllables during an auditory discrimination task than to comparably complex auditory patterns that cannot be associated with learned phonemic categories. In contrast, areas in the dorsal superior temporal gyrus bilaterally, closer to primary auditory cortex, are activated to the same extent by the phonemic and nonphonemic sounds. Thus, the left middle/anterior STS appears to play a role in phonemic perception. It may represent an intermediate stage of processing in a functional pathway linking areas in the bilateral dorsal superior temporal gyrus, presumably involved in the analysis of physical features of speech and other complex non-speech sounds, to areas in the left anterior STS and middle temporal gyrus that are engaged in higher-level linguistic processes.