Hickok Gregory, Okada Kayoko, Serences John T
Center for Cognitive Neuroscience, Department of Cognitive Sciences, University of California, Irvine, CA 92697, USA.
J Neurophysiol. 2009 May;101(5):2725-32. doi: 10.1152/jn.91099.2008. Epub 2009 Feb 18.
Processing incoming sensory information and transforming this input into appropriate motor responses is a critical and ongoing aspect of our moment-to-moment interaction with the environment. While the neural mechanisms in the posterior parietal cortex (PPC) that support the transformation of sensory inputs into simple eye or limb movements has received a great deal of empirical attention-in part because these processes are easy to study in nonhuman primates-little work has been done on sensory-motor transformations in the domain of speech. Here we used functional magnetic resonance imaging and multivariate analysis techniques to demonstrate that a region of the planum temporale (Spt) shows distinct spatial activation patterns during sensory and motor aspects of a speech task. This result suggests that just as the PPC supports sensorimotor integration for eye and limb movements, area Spt forms part of a sensory-motor integration circuit for the vocal tract.
处理传入的感觉信息并将这种输入转化为适当的运动反应，是我们与环境进行时刻互动的一个关键且持续的方面。虽然后顶叶皮层（PPC）中支持将感觉输入转化为简单眼部或肢体运动的神经机制已受到大量实证关注——部分原因是这些过程在非人类灵长类动物中易于研究——但在言语领域的感觉运动转化方面所做的工作很少。在这里，我们使用功能磁共振成像和多变量分析技术来证明颞平面（Spt）的一个区域在言语任务的感觉和运动方面表现出不同的空间激活模式。这一结果表明，正如PPC支持眼部和肢体运动的感觉运动整合一样，Spt区域构成了声道感觉运动整合回路的一部分。
