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Event-related brain potential investigations of left and right hemisphere contributions to syntactic processing.

机译：左半球和右半球对句法处理的事件相关的脑电势调查。

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摘要

Syntactic processing is widely held to be a left hemisphere (LH) phenomenon, a view influenced by a large body of research showing lesions to certain LH areas are far more devastating than are lesions to corresponding right hemisphere (RH) areas. Although few studies have examined whether RH damage causes subtle syntactic processing deficits, there is evidence it does. This dissertation investigated the relative contribution of each hemisphere to syntactic processing in neurologically normal individuals using event-related potential (ERP) and behavioral studies in combination with the visual half-field paradigm. Central presentation ERP studies were conducted as a baseline against which to compare the results of the lateralized studies. The first experiment series (chapters two, three) examined processing of (in)correct grammatical number agreement marked either lexically or morphologically. Both behavioral and ERP results suggested the hemispheres are equally able to appreciate lexically marked agreement. In contrast, the RH appears to have greater difficulty than the left in processing morphologically marked agreement. The second experiment series (chapters four, five) investigated whether this LH advantage for morphologically-marked agreement errors reflects a language-specific difference in hemispheric processing or a low level, perceptually-based difference. Stimuli included both morphological and lexical conditions; salience of lexical markings was manipulated to adjudicate between these alternatives. Behavioral results suggested that the observed processing differences were based at the perceptual level. However, the ERP results obtained were not in accord with the predictions and did not lend themselves to any clear conclusions with respect to the hypothesis investigated. The central presentation studies in chapter two also investigate how aging affects syntactic processing. ERPs from elderly compared to young participants showed no evidence of an age-related delayed or diminished P600 effect, although there were changes in its scalp distribution, suggesting a qualitative, rather than any strictly quantitative, age-related change in speed of processing. Chapter four provides data relevant to the debate concerning the mental representation(s) of regular and irregular words, and the mental processes underlying the left anterior negativity component. Overall, we find that the RH is sensitive to certain grammatical manipulations, although not always in the same manner as the LH.
机译：句法处理被广泛认为是左半球（LH）现象，这一观点受到大量研究的影响，显示对某些LH区域的损害要比对相应的右半球（RH）区域的损害更具破坏性。尽管很少有研究检查RH损伤是否引起细微的句法加工缺陷，但有证据表明确实如此。本文利用事件相关电位（ERP）和行为研究结合视觉半场范式，研究了神经系统正常个体中每个半球对句法加工的相对贡献。进行了集中介绍的ERP研究作为基线，以比较横向研究的结果。第一个实验系列（第二，三章）检查了在词汇或词法上标记的（不正确的）语法数字一致的处理。行为和ERP结果都表明，半球同样能够欣赏词汇标记的一致。相比之下，RH在处理形态学标记的一致性方面似乎比左手更大。第二个实验系列（第4、5章）研究了LH在形态学标记的一致性错误方面的优势是反映了半球处理中特定于语言的差异还是基于感知的低水平差异。刺激包括形态条件和词汇条件；词汇标记的显着性被操纵以在这些备选方案之间进行裁定。行为结果表明，观察到的加工差异是基于感知水平的。但是，获得的ERP结果与预测结果不符，也没有就所研究的假设得出任何明确的结论。第二章的主要介绍性研究还研究了老化如何影响句法加工。与老年人相比，老年人的ERPs没有显示出与年龄相关的P600效应延迟或减弱的证据，尽管其头皮分布发生了变化，表明加工速度是与年龄相关的定性变化，而不是任何严格定量的变化。第四章提供有关辩论的数据，这些辩论涉及规则和不规则词的心理表征以及左前否定成分的心理过程。总的来说，我们发现RH对某些语法操作很敏感，尽管并不总是与LH相同。

著录项

  • 作者

    Kemmer, Laura.;

  • 作者单位

    University of California, San Diego.;

  • 授予单位 University of California, San Diego.;
  • 学科 Biology Neuroscience.;Psychology Physiological.;Psychology Experimental.
  • 学位 Ph.D.
  • 年度 2009
  • 页码 352 p.
  • 总页数 352
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

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