Hakvoort Britt, van der Leij Aryan, van Setten Ellie, Maurits Natasha, Maassen Ben, van Zuijen Titia
Research Institute of Child Development and Education, Faculty of Social and Behavioral Sciences, University of Amsterdam, The Netherlands.
Research Institute of Child Development and Education, Faculty of Social and Behavioral Sciences, University of Amsterdam, The Netherlands.
Brain Cogn. 2016 Nov;109:75-83. doi: 10.1016/j.bandc.2016.09.004. Epub 2016 Sep 17.
Atypical language lateralization has been marked as one of the factors that may contribute to the development of dyslexia. Indeed, atypical lateralization of linguistic functions such as speech processing in dyslexia has been demonstrated using neuroimaging studies, but also using the behavioral dichotic listening (DL) method. However, so far, DL results have been mixed. The current study assesses lateralization of speech processing by using DL in a sample of children at familial risk (FR) for dyslexia. In order to determine whether atypical lateralization of speech processing relates to reading ability, or is a correlate of being at familial risk, the current study compares the laterality index of FR children who did and did not become dyslexic, and a control group of readers without dyslexia. DL was tested in 3rd grade and in 5/6th grade. Results indicate that at both time points, all three groups have a right ear advantage, indicative of more pronounced left-hemispheric processing. However, the FR-dyslexic children are less good at reporting from the left ear than controls and FR-nondyslexic children. This impediment relates to reading fluency.
非典型语言侧化被认为是可能导致诵读困难发展的因素之一。事实上，诵读困难患者语言功能（如言语处理）的非典型侧化已通过神经影像学研究得到证实，同时也通过行为双耳分听（DL）方法得到证实。然而，到目前为止，DL的结果并不一致。本研究通过对有诵读困难家族风险（FR）的儿童样本使用DL来评估言语处理的侧化情况。为了确定言语处理的非典型侧化是与阅读能力相关，还是家族风险的一个相关因素，本研究比较了后来发展为诵读困难和未发展为诵读困难的FR儿童的侧化指数，以及一个无诵读困难的阅读对照组。在三年级和五/六年级对DL进行了测试。结果表明，在两个时间点，所有三组都有右耳优势，表明左半球处理更为明显。然而，FR诵读困难儿童比对照组和FR非诵读困难儿童更不擅长报告来自左耳的信息。这种障碍与阅读流畅性有关。
