Reading, hearing, and the planum temporale
Reading, hearing, and the planum temporale
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DOI：
10.1016/j.neuroimage.2004.08.025
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发表时间：
2005-01-15
期刊：
影响因子：
5.7
通讯作者：
Berman, KF
中科院分区：
文献类型：
--
作者：
Buchsbaum, BR;Olsen, RK;Berman, KF
在过去的15年里，许多关于单字阅读的神经影像学研究已经开展，并且关于与这项任务相关的大脑区域已经达成共识。令人惊讶的是，在这些调查中，颞平面（PT）并没有出现在一贯活跃的区域目录中。然而，最近，一些研究提供的证据表明，左后内侧PT在言语产生和言语感知中起着重要作用。那么，为什么这么多关于单字阅读的神经影像学研究--一项需要言语产生的任务--往往没有发现PT参与的证据，这一点还不清楚。在目前的工作中，我们采用了一个高功率的快速事件相关的功能磁共振成像范式，涉及单pseudoword阅读和单pseudoword听，以评估活动相关的阅读和言语知觉的PT作为一个功能的空间平滑程度的功能图像。我们发现，语音区域的PT [Sylvian-parietal-temporal（Spt）]是最好的识别时，只有一个温和的（5毫米）量的空间平滑应用于数据统计分析之前。此外，将平滑窗口增加到10转会消除PT中的激活，这表明在过去的研究中未能发现PT激活可能与此因素有关。(C)2004年爱思唯尔公司All rights reserved.
Many neuroimaging studies of single-word reading have been carried out over the last 15 years, and a consensus as to the brain regions relevant to this task has emerged. Surprisingly, the planum temporale (PT) does not appear among the catalog of consistently active regions in these investigations. Recently, however, several studies have offered evidence suggesting that the left posteromedial PT plays a role in both speech production and speech perception. It is not clear, then, why so many neuroimaging studies of single-word reading - a task requiring speech production - have tended not to rind evidence of PT involvement. In the present work, we employed a high-powered rapid event-related fMRI paradigm involving both single pseudoword reading and single pseudoword listening to assess activity related to reading and speech perception in the PT as a function of the degree of spatial smoothing applied to the functional images. We show that the speech area of the PT [Sylvian-parietal-temporal (Spt)] is best identified when only a moderate (5 mm) amount of spatial smoothing is applied to the data before statistical analysis. Moreover, increasing the smoothing window to 10 turn obliterates activation in the PT, suggesting that failure to find PT activation in past studies may relate to this factor. (C) 2004 Elsevier Inc. All rights reserved.