Information flow in the auditory cortical network.
Information flow in the auditory cortical network.
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DOI：
10.1016/j.heares.2010.01.011
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发表时间：
2011-01
期刊：
影响因子：
2.8
通讯作者：
Hackett, Troy A.
中科院分区：
文献类型：
--
作者：
Hackett, Troy A.
大脑皮层的听觉处理是由分布在前脑的听觉和听觉相关区域的相互连接的网络组成的。听觉活动的联系位于颞叶皮层的几个专门区域或领域之间，这些区域或领域接收来自内侧膝状复合体的密集输入。这些区域统称为听觉皮层。听觉活动通过与皮层中其他与听觉相关的区域的连接而扩展到听觉皮层之外。在这个网络内，各地区之间的信息来往于无数目标，但其特点是有秩序的区域、地区和层流模式。这些模式反映了在网络的所有层次被动地控制信息流的一些结构约束。此外，这些回路内的信息交换受到投射神经元及其目标的内在神经化学特性的动态调节。本文首先概述了主要电路，以及每个电路如何与沿网络主要轴的信息流相关。然后，讨论转向沿着这些轴的神经化学梯度的描述，重点介绍了最近关于丘脑皮质向听觉皮层投射的谷氨酸转运体的工作。文章最后简要讨论了相关的神经生理学发现，因为它们与网络结构梯度有关。
Auditory processing in the cerebral cortex is comprised of an interconnected network of auditory and auditory-related areas distributed throughout the forebrain. The nexus of auditory activity is located in temporal cortex among several specialized areas, or fields, that receive dense inputs from the medial geniculate complex. These areas are collectively referred to as auditory cortex. Auditory activity is extended beyond auditory cortex via connections with auditory-related areas elsewhere in the cortex. Within this network, information flows between areas to and from countless targets, but in a manner that is characterized by orderly regional, areal and laminar patterns. These patterns reflect some of the structural constraints that passively govern the flow of information at all levels of the network. In addition, the exchange of information within these circuits is dynamically regulated by intrinsic neurochemical properties of projecting neurons and their targets. This article begins with an overview of the principal circuits and how each is related to information flow along major axes of the network. The discussion then turns to a description of neurochemical gradients along these axes, highlighting recent work on glutamate transporters in the thalamocortical projections to auditory cortex. The article concludes with a brief discussion of relevant neurophysiological findings as they relate to structural gradients in the network.
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