左额下回与言语产生中单峰与跨峰干扰的解决:经颅直流电刺激研究

IF 1.2 3区 心理学 Q2 LINGUISTICS
E. Ward , H.S. Gauvin , K.L. McMahon , M. Meinzer , G.I. de Zubicaray
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引用次数: 0

摘要

大多数口语单词产生的神经生物学模型提出,在单词提取过程中,多个候选词汇在左后颞皮层被激活。一些说法还提出了左额下回(LIFG)在从这些候选词中选择正确单词方面的作用。这两种建议的证据都来自图片-单词干扰(PWI)范式,在这种范式中,参与者在忽略干扰词的同时说出图片(如兔子)。与不相关的词(如小提琴-兔子)相比,分类相关的干扰物(如马-兔子)的命名潜伏期较慢,这是一种被称为语义干扰的效应,而全等干扰物(如兔子-兔子)有助于命名,但这些影响发生的确切条件仍然存在争议。尽管这种模式下左颞叶皮层参与的神经影像学证据是强有力的,但LIFG参与的证据更加模棱两可,特别是语义干扰。在神经影像学研究中区分LIFG参与的一个关键因素是干扰物的方式,即听觉干扰物的活动更一致。因此,我们将在线经颅直流电刺激(atDCS)应用于LIFG和左侧后颞叶皮层,采用三向、交叉、假控制的PWI模式,包括书面(实验1)或听觉(实验2)分心物。令人惊讶的是,与假手术相比,后颞叶皮层的atDCS显著减缓了书面分心物的一致性促进效应,但没有调节语义干扰效应,而后颞叶皮层的atDCS对这两种效应都没有显著影响。我们也没有观察到atDCS与听觉干扰物有任何显著的调节作用。目前的研究结果仅部分支持PWI期间左颞叶参与,并没有提供前颞叶参与的证据。我们建议未来的PWI研究系统地研究tDCS方案中不同的电极蒙太奇。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
The left inferior frontal gyrus and the resolution of unimodal vs. cross-modal interference in speech production: A transcranial direct current stimulation study

Most neurobiological models of spoken word production propose that multiple lexical candidates are activated in left posterior temporal cortex during word retrieval. Some accounts also propose a role for the left inferior frontal gyrus (LIFG) in selecting the correct word from among these candidates. Evidence for both proposals has come from the picture-word interference (PWI) paradigm, in which participants name pictures (e.g., RABBIT) while ignoring a distractor word. Categorically related distractors (e.g., horse-RABBIT) slow naming latencies compared to unrelated words (e.g., violin-RABBIT), an effect known as semantic interference, whereas congruent distractors (e.g., rabbit-RABBIT) facilitate naming, but the precise conditions in which these effects occur remain a matter of debate. Although the neuroimaging evidence for left temporal cortex engagement in this paradigm is robust, the evidence for LIFG involvement is more equivocal, particularly for semantic interference. A key factor distinguishing LIFG involvement in neuroimaging studies is distractor modality, i.e., activity is more consistently reported for auditory distractors. We therefore applied online anodal transcranial Direct Current Stimulation (atDCS) to LIFG and left posterior temporal cortex in a three-way, cross-over, sham-controlled PWI paradigm involving either written (Experiment 1) or auditory (Experiment 2) distractors. Surprisingly, compared to sham, atDCS over posterior temporal cortex significantly slowed the congruent facilitation effect with written distractors, but did not modulate the semantic interference effect, while atDCS to LIFG did not significantly influence either effect. We also failed to observe any significant modulatory effects of atDCS with auditory distractors. The present results only partially support left temporal lobe engagement during PWI and provide no evidence for LIFG involvement. We recommend future PWI studies systematically investigate different electrode montages in tDCS protocols.

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来源期刊
Journal of Neurolinguistics
Journal of Neurolinguistics 医学-神经科学
CiteScore
3.90
自引率
5.00%
发文量
49
审稿时长
17.2 weeks
期刊介绍: The Journal of Neurolinguistics is an international forum for the integration of the neurosciences and language sciences. JNL provides for rapid publication of novel, peer-reviewed research into the interaction between language, communication and brain processes. The focus is on rigorous studies of an empirical or theoretical nature and which make an original contribution to our knowledge about the involvement of the nervous system in communication and its breakdowns. Contributions from neurology, communication disorders, linguistics, neuropsychology and cognitive science in general are welcome. Published articles will typically address issues relating some aspect of language or speech function to its neurological substrates with clear theoretical import. Interdisciplinary work on any aspect of the biological foundations of language and its disorders resulting from brain damage is encouraged. Studies of normal subjects, with clear reference to brain functions, are appropriate. Group-studies on well defined samples and case studies with well documented lesion or nervous system dysfunction are acceptable. The journal is open to empirical reports and review articles. Special issues on aspects of the relation between language and the structure and function of the nervous system are also welcome.
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