Neurodynamics of selected language processes involved in word reading: An EEG study with French dyslexic adults

IF 1.2 3区 心理学 Q2 LINGUISTICS
Aikaterini Premeti , Maria Pia Bucci , Karin Heidlmayr , Pierre Vigneron , Frédéric Isel
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引用次数: 0

Abstract

This event-related potential (ERP) study aimed to examine at which point in the stream of four cognitive processes of word reading impairment occurs in dyslexic adults. Fourteen French native dyslexic speakers and eighteen matched controls performed a delayed phonological lexical decision task that consisted in deciding whether visual stimuli sounded like French words. Three hundred stimuli equally distributed among five experimental conditions (60 concrete French words, 60 pseudo-homophones, 60 pseudowords, 60 consonant and 60 symbol strings) were presented. Critically, two language processes involving phonological information, namely grapheme-to-phoneme conversion (N320) and memory retrieval of phonological information (Late Positive Complex) were impaired in dyslexics compared to controls. Moreover, lexical access (N400) was significantly modulated by six predictive variables assumed to be reliable markers of dyslexia. In contrast, and unexpectedly, the early processes of visual expertise for print (N170) appeared to operate in the same way in the two groups of participants. The locus of dyslexia is probably to be found primarily in some aspects of phonological processing during word reading. These findings support a clinical neurophysiology model postulating that at least two phonological processes during reading might be impaired in dyslexics, namely grapheme-to-phoneme conversion, and memory retrieval of phonological information.

单词阅读所涉及的特定语言过程的神经动力学:针对法国成人阅读障碍者的脑电图研究
这项与事件相关的电位(ERP)研究旨在探讨阅读障碍成人在四个认知过程中的哪个环节出现了单词阅读障碍。14 名以法语为母语的阅读障碍患者和 18 名匹配的对照者进行了一项延迟语音词汇决策任务,该任务包括判断视觉刺激物听起来是否像法语单词。在五种实验条件(60 个具体法语单词、60 个伪同音词、60 个伪单词、60 个辅音和 60 个符号串)中平均分配了 300 个刺激物。重要的是,与对照组相比,阅读障碍患者涉及语音信息的两个语言过程,即从词素到词素的转换(N320)和语音信息的记忆检索(晚期阳性复合体)受到了损害。此外,词汇访问(N400)受到六个被认为是阅读障碍可靠标记的预测变量的显著调节。与此相反,出乎意料的是,两组参与者对印刷品的早期视觉专业过程(N170)似乎以相同的方式运行。诵读困难的病因可能主要在于单词阅读过程中语音处理的某些方面。这些研究结果支持临床神经生理学模型的假设,即阅读障碍患者在阅读过程中至少有两个语音处理过程可能会受损,即词素到音素的转换和语音信息的记忆检索。
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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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