Englund Julia A, Palomares Melanie
Department of Psychology, University of South Carolina, Columbia, SC 29208, United States.
Vision Res. 2012 Aug 15;67:14-21. doi: 10.1016/j.visres.2012.06.020. Epub 2012 Jul 6.
Visual motion processing in typical and atypical readers has suggested aspects of reading and motion processing share a common cortical network rooted in dorsal visual areas. Few studies have examined the relationship between reading performance and visual form processing, which is mediated by ventral cortical areas. We investigated whether reading fluency correlates with coherent motion detection thresholds in typically developing children using random dot kinematograms. As a comparison, we also evaluated the correlation between reading fluency and static form detection thresholds. Results show that both dorsal and ventral visual functions correlated with components of reading fluency, but that they have different developmental characteristics. Motion coherence thresholds correlated with reading rate and accuracy, which both improved with chronological age. Interestingly, when controlling for non-verbal abilities and age, reading accuracy significantly correlated with thresholds for coherent form detection but not coherent motion detection in typically developing children. Dorsal visual functions that mediate motion coherence seem to be related maturation of broad cognitive functions including non-verbal abilities and reading fluency. However, ventral visual functions that mediate form coherence seem to be specifically related to accurate reading in typically developing children.
典型阅读者和非典型阅读者的视觉运动处理表明，阅读和运动处理的某些方面共享一个根植于背侧视觉区域的共同皮质网络。很少有研究考察阅读表现与视觉形式处理之间的关系，而视觉形式处理是由腹侧皮质区域介导的。我们使用随机点运动图研究了正常发育儿童的阅读流畅性与连贯运动检测阈值之间是否存在关联。作为比较，我们还评估了阅读流畅性与静态形式检测阈值之间的相关性。结果表明，背侧和腹侧视觉功能均与阅读流畅性的组成部分相关，但它们具有不同的发育特征。运动连贯性阈值与阅读速度和准确性相关，二者均随实际年龄增长而提高。有趣的是，在控制了非语言能力和年龄后，正常发育儿童的阅读准确性与连贯形式检测阈值显著相关，而与连贯运动检测阈值无关。介导运动连贯性的背侧视觉功能似乎与包括非语言能力和阅读流畅性在内的广泛认知功能的成熟有关。然而，介导形式连贯性的腹侧视觉功能似乎与正常发育儿童的准确阅读特别相关。
