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首页> 外文期刊>Proceedings of the National Academy of Sciences of the United States of America >Temporal-callosal pathway diffusivity predicts phonological skills in children
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Temporal-callosal pathway diffusivity predicts phonological skills in children

机译：时态-声道的扩散预测儿童的语音技能

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摘要

The development of skilled reading requires efficient communication between distributed brain regions. By using diffusion tensor imaging, we assessed the interhemispheric connections in a group of children with a wide range of reading abilities. We segmented the callosal fibers into regions based on their likely cortical projection zones, and we measured diffusion properties in these segmented regions. Phonological awareness (a key factor in reading acquisition) was positively correlated with diffusivity perpendicular to the main axis of the callosal fibers that connect the temporal lobes. These results could be explained by several physiological properties. For example, good readers may have fewer but larger axons connecting left and right temporal lobes, or their axon membranes in these regions may be more permeable than the membranes of poor readers. These measurements are consistent with previous work suggesting that good readers have reduced interhemispheric connectivity and are better at processing rapidly changing visual and auditory stimuli.
机译：熟练阅读的发展需要分布式大脑区域之间的有效沟通。通过使用扩散张量成像，我们评估了一组具有广泛阅读能力的儿童的半球间连接。我们根据其可能的皮质投影区域将the骨纤维分成多个区域，并测量了这些分割区域的扩散特性。语音意识（获取阅读的关键因素）与垂直于连接颞叶call骨纤维主轴的扩散率呈正相关。这些结果可以用几种生理特性来解释。例如，好的阅读器可能具有较少但较大的连接左右颞叶的轴突，或者它们在这些区域的轴突膜可能比不良阅读器的膜更具渗透性。这些测量结果与以前的研究结果一致，表明优秀的读者减少了半球之间的连通性，并且更擅长处理快速变化的视觉和听觉刺激。

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