School of Psychological Sciences, University of Manchester, Manchester, UK.
Hum Brain Mapp. 2012 Feb;33(2):360-72. doi: 10.1002/hbm.21218. Epub 2011 Mar 9.
A repetition-suppression functional magnetic resonance imaging paradigm was used to explore the neuroanatomical substrates of processing two types of acoustic variation-speaker and accent-during spoken sentence comprehension. Recordings were made for two speakers and two accents: Standard Dutch and a novel accent of Dutch. Each speaker produced sentences in both accents. Participants listened to two sentences presented in quick succession while their haemodynamic responses were recorded in an MR scanner. The first sentence was spoken in Standard Dutch; the second was spoken by the same or a different speaker and produced in Standard Dutch or in the artificial accent. This design made it possible to identify neural responses to a switch in speaker and accent independently. A switch in accent was associated with activations in predominantly left-lateralized areas including posterior temporal regions, including superior temporal gyrus, planum temporale (PT), and supramarginal gyrus, as well as in frontal regions, including left pars opercularis of the inferior frontal gyrus (IFG). A switch in speaker recruited a predominantly right-lateralized network, including middle frontal gyrus and prenuneus. It is concluded that posterior temporal areas, including PT, and frontal areas, including IFG, are involved in processing accent variation in spoken sentence comprehension.
采用重复抑制功能磁共振成像范式，探讨了在口语句子理解过程中处理两种类型的语音变化（说话人差异和口音差异）的神经解剖学基础。记录了两位说话者和两种口音的发音：标准荷兰语和一种新的荷兰语口音。每位说话者用两种口音都读了句子。参与者在磁共振扫描仪中记录他们的血液动力学反应的同时，快速连续地听了两个句子。第一个句子是用标准荷兰语说的；第二个句子是由同一个或不同的说话者用标准荷兰语或人工口音说的。这种设计使得独立识别说话人和口音变化的神经反应成为可能。口音的变化与主要在左侧的区域的激活有关，包括颞后区，包括颞上回、颞平面（PT）和缘上回，以及额叶区域，包括左侧额下回的外侧眶额回（IFG）。说话人的变化招募了一个主要在右侧的网络，包括中额回和前扣带回。结论是，包括 PT 的颞后区和包括 IFG 的额叶区，参与了口语句子理解中口音变化的处理。
