Radboud University Nijmegen, Donders Institute for Brain, Cognition and Behaviour, The Netherlands.
Brain Lang. 2013 Sep;126(3):291-301. doi: 10.1016/j.bandl.2013.07.004. Epub 2013 Aug 7.
The proposal of a general conflict resolution mechanism in lIFG was investigated further in relation to language errors. In an fMRI study participants read sentences containing syntactic and plausibility violations. Furthermore, they were presented with sentences that were difficult to comprehend, due to degradation of the bottom-up signal (i.e., the visual form) of the language. We were interested whether comprehension difficulties caused by degradation would activate cognitive control mechanisms in the same manner as other language violations. To localize cognitive control processes participants performed a Stroop task. Both the violations and the visual degradation condition elicited co-localized lIFG activation with the Stroop conflict. These results indicate that lIFG implements control adjustments to resolve situations in which extra attention is needed more generally. Next to biasing attention to resolve representational conflicts arising from different types of errors, lIFG may also adjust control to compensate for a temporary lack of bottom-up information.
进一步提出在左侧额下回（IFG）中建立一个通用冲突解决机制的建议，该机制与语言错误有关。在 fMRI 研究中，参与者阅读包含句法和合理性违反的句子。此外，由于语言的自下而上信号（即视觉形式）退化，参与者还阅读了难以理解的句子。我们感兴趣的是，由于降级而导致的理解困难是否会以与其他语言违规相同的方式激活认知控制机制。为了定位认知控制过程，参与者执行了斯特鲁普任务。违规和视觉降级条件都引起了 lIFG 与斯特鲁普冲突的共同激活。这些结果表明，lIFG 实施控制调整，以更普遍地解决需要额外注意力的情况。除了将注意力偏向于解决由不同类型的错误引起的表示冲突之外，lIFG 还可能调整控制以补偿暂时缺乏自下而上的信息。
