Probing the Timing Recruitment of Broca's Area in Speech Production for Mandarin Chinese: A TMS Study.
Probing the Timing Recruitment of Broca's Area in Speech Production for Mandarin Chinese: A TMS Study.
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普通话语音生成中布罗卡区时序招募的探讨：TMS 研究
DOI：
10.3389/fnhum.2018.00133
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发表时间：
2018
影响因子：
2.9
通讯作者：
Li L
中科院分区：
文献类型：
--
作者：
Zhang Q;Yu B;Zhang J;Jin Z;Li L
虽然布罗卡区在言语产生中扮演重要角色，但神经科学家仍在争论不同语言的时间招募。为了探讨汉语语音编码的精确时程，在5个不同的时间窗（150 ms、225 ms、300 ms、400 ms和500 ms）下，分别在Broca区应用真实的三脉冲经颅磁刺激（tpTMS）和假tpTMS。为了排除非特异性TMS效应，并确保研究中观察到的效应确实是由于刺激布罗卡区所致，我们还对另一组受试者进行了对照实验。在225 ms、300 ms和400 ms时窗对Broca区施加真实的TMS刺激时，与其他时窗的假TMS刺激相比，观察到反应时间（RT）显著增加，峰值在225 ms。我们的研究结果支持了汉语语音编码可能从200 ms开始到400 ms结束的假设，略早于印欧语的355 ms到455 ms。
Although Broca’s area is widely recognized to play an important role in speech production, neuroscientists still debate on its timing recruitment across different languages. In order to investigate the precise time course of phonological encoding for Mandarin Chinese, we applied real triple-pulse transcranial magnetic stimulation (tpTMS) and sham tpTMS within Broca’s area at five different time windows respectively (150 ms, 225 ms, 300 ms, 400 ms and 500 ms) in picture naming task in Mandarin Chinese. To exclude unspecific TMS effects and to make sure that the effects observed in the study were really due to stimulation at Broca’s area, we also conducted a control experiment by a different group of subjects. Significant increases in reaction times (RTs) were observed when real TMS stimulation at Broca’s area was applied at 225 ms, 300 ms and 400 ms time windows with a peak at 225 ms, compared with sham TMS stimulation at other time windows. Our findings support the hypothesis that the phonological encoding in speech production for Chinese language may approximately start from 200 ms and end around 400 ms post target onset, a little earlier than that from 355 ms to 455 ms for Indo-European languages.
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