Department of Psychological and Brain Sciences, Indiana University, Bloomington, USA.
Hum Brain Mapp. 2010 Jan;31(1):65-79. doi: 10.1002/hbm.20845.
An event-related fMRI study was conducted to investigate the effect of two different sentence presentation paradigms-rapid serial visual presentation (RSVP) and whole sentence presentation-on syntactic processing. During scanning, sentences were presented using one of the two presentation paradigms and were followed by a short delay and a probe to verify sentence comprehension. The delay was included in an attempt to separate sentence-related activity from probe-related activity. The behavioral data showed a main effect of syntactic complexity for reaction time and accuracy, and accuracy revealed an interaction between complexity and the presentation paradigm employed-RSVP produced many more errors for syntactically complex sentences than did whole sentence presentation. The imaging data revealed a syntactic complexity effect during the sentence phase in left BA 44 and during the probe phase in left BA 44 and the left posterior MTG. In addition, timecourse analysis revealed that these two regions also showed an interaction between complexity and presentation paradigm such that there was no complexity effect during RSVP but a significant effect during whole sentence presentation. In addition to finding that these two presentation paradigms differentially affected syntactic processing, there were main effects within the visual pathway (V1/V2 vs. V5) and the hippocampus that revealed significant differences in activation between the paradigms.
一项基于事件的 fMRI 研究旨在调查两种不同的句子呈现范式——快速连续视觉呈现（RSVP）和整句呈现——对句法处理的影响。在扫描过程中，句子以两种呈现范式之一呈现，然后是短暂的延迟和探针以验证句子理解。延迟的加入是为了将句子相关活动与探针相关活动分开。行为数据显示，句法复杂度对反应时间和准确性有显著影响，准确性还揭示了复杂度与所采用的呈现范式之间的交互作用——RSVP 对句法复杂的句子产生的错误比整句呈现多得多。成像数据显示，在句子阶段，左 BA44 区和探针阶段，左 BA44 和左后颞上回（MTG）区都存在句法复杂度效应。此外，时程分析还显示，这两个区域还显示出复杂度和呈现范式之间的交互作用，即 RSVP 期间没有复杂度效应，但整句呈现期间有显著效应。除了发现这两种呈现范式对句法处理有不同影响外，在视觉通路（V1/V2 与 V5）和海马体中还发现了与范式之间显著差异的激活的主要效应。
