High frequency oscillations as a correlate of visual perception
High frequency oscillations as a correlate of visual perception
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DOI：
10.1016/j.ijpsycho.2010.07.004
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发表时间：
2011-01-01
影响因子：
3
通讯作者：
Busch, Niko A.
中科院分区：
文献类型：
--
作者：
Martinovic, Jasna;Busch, Niko A.
在γ波段范围内（bb0 ~ 30hz）的皮层振荡活动是在动物和人类的一系列认知过程中出现的神经编码的基本机制。自第一篇关于属于同一方向列的V1神经元之间高频振荡同步的报道（Gray和Singer， 1989， PNAS, 86, 1698-1702）以来，这种振荡在视觉感知中的作用得到了广泛的研究。视觉刺激引起早期诱发的伽玛带反应和较晚诱导的（既非时间也非锁相）反应。现在，大量的实验证据表明，诱发和诱导的高频振荡与一系列视觉刺激特性有关。在早期对视觉伽马波段振荡研究的基础上，被诱发的高频振荡活动被认为是连贯知觉形成和物体表征的皮层机制，而被诱发的高频活动则与图像特征的处理有关。最近的研究表明，诱发和诱导的γ波段活动都与视觉检测和识别的速度和准确性相关。此外，视觉皮层诱导的伽马带振荡也与注视眼运动模式相关。伽马波段活动与视觉感知效能之间的这些直接关系强烈表明，皮层高频同步构成了一种神经机制，为有组织地摄取和分析视觉信息提供必要的过程。(C) 2010 Elsevier B.V.版权所有
Cortical oscillatory activity in the gamma-band range (> 30 Hz) is a fundamental mechanism of neural coding that arises during a range of cognitive processes in both animals and humans. Since the first report on high frequency oscillatory synchrony between V1 neurons belonging to the same orientation column (Gray and Singer, 1989, PNAS, 86, 1698-1702), the role of such oscillations in visual perception has been extensively researched. Visual stimuli elicit an early, evoked gamma-band response and a later, induced (neither time nor phase-locked) response. An abundance of experimental evidence now links both evoked and induced high frequency oscillations to a range of visual stimulus properties. On the basis of early studies into gamma-band oscillations in vision, induced high frequency oscillatory activity has been proposed as a putative cortical mechanism of coherent percept formation and object representation while evoked high frequency activity was related to the processing of image features. Recent studies demonstrate that both evoked and induced gamma-band activity are correlated with the speed and accuracy of visual detection and discrimination. Furthermore, induced gamma-band oscillations in the visual cortex are also correlated with fixational eye movement patterns. These direct relations between gamma-band activity and the efficacy of visual perception strongly suggest that cortical high frequency synchronisations constitute a neural mechanism that subserves processes essential for the organised intake and analysis of visual information. (C) 2010 Elsevier B.V. All rights reserved.