The visual magnocellular deficit in developmental dyslexia / 中华行为医学与脑科学杂志

ABSTRACT

To study the visual magnocellular deficit in alphabetic and Chinese developmental dyslex?ia from behavioral,neural mechanism and intervention studies,critical words in Chinese and English (de?velopmental dyslexia and magnocellular pathway or dorsal stream or contrast sensitivity or coherent mo?tion ) were searched in Chinese and English databases(CNKI,PubMed,ScienceDirect,etc.) from Septem?ber to December,2015. Forty?three relevant articles which aimed to investigate the visual magnocellular defi?cit in developmental dyslexia were selected among 75 articles according to the searching result and the objec?tive of the present study. The results showed that alphabetic studies consistently consistently manifested the magnocellular deficit in developmental dyslexia from the aspects of behavioral performance,neural activities and intervention effects. However,whether the deficit was the cause or the consequence of dyslexia remains controversial. In Chinese,most of studies on magnocellular deficit of developmental dyslexia were behavioral. There were few studies from aspects of neural mechanism and intervention. Alphabetic and Chinese studies consistently manifested magnocellular deficit in developmental dyslexia,suggesting the consistency across lan?guages. However,more comprehensive studies are required to further explore the causal relationship between magnocellular deficit and developmental dyslexia.