Department of Cognitive, Linguistic & Psychological Sciences, Brown University, United States; BCBL - Basque Center on Cognition, Brain and Language, Donostia-San Sebastian, Spain.
Neuroscience Department, Brown University, United States.
Brain Lang. 2019 Dec;199:104698. doi: 10.1016/j.bandl.2019.104698. Epub 2019 Oct 3.
This study examines cross-modality effects of a semantically-biased written sentence context on the perception of an acoustically-ambiguous word target identifying neural areas sensitive to interactions between sentential bias and phonetic ambiguity. Of interest is whether the locus or nature of the interactions resembles those previously demonstrated for auditory-only effects. FMRI results show significant interaction effects in right mid-middle temporal gyrus (RmMTG) and bilateral anterior superior temporal gyri (aSTG), regions along the ventral language comprehension stream that map sound onto meaning. These regions are more anterior than those previously identified for auditory-only effects; however, the same cross-over interaction pattern emerged implying similar underlying computations at play. The findings suggest that the mechanisms that integrate information across modality and across sentence and phonetic levels of processing recruit amodal areas where reading and spoken lexical and semantic access converge. Taken together, results support interactive accounts of speech and language processing.
本研究考察了语义偏向的书面句子语境对听觉上模棱两可的单词目标感知的跨模态效应，以确定对句子偏向和语音歧义之间相互作用敏感的神经区域。感兴趣的是，相互作用的位置或性质是否类似于先前为听觉效果所证明的。FMRI 结果显示，在右中颞叶（RmMTG）和双侧前颞上回（aSTG）中存在显著的相互作用效应，这些区域位于沿着腹侧语言理解流的位置，将声音映射到意义上。这些区域比以前为听觉效果确定的区域更靠前；然而，相同的交叉相互作用模式出现，表明正在发挥类似的潜在计算。研究结果表明，跨模态和句子以及语音处理层次信息整合的机制利用了模态区域，其中阅读和口语词汇和语义访问汇聚。总之，结果支持言语和语言处理的交互式解释。
