A framework for describing the effects of attention on visual responses.

A framework for describing the effects of attention on visual responses.
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DOI:
10.1016/j.visres.2008.11.001
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发表时间:
2009-06
期刊:
影响因子:
1.8
通讯作者:
Boynton GM
Boynton GM
中科院分区:
心理学3区
文献类型:
--
作者:
Boynton GM

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在过去 25 年里,人们对于注意力如何影响猴子和人类视觉皮层的神经元对刺激的反应有了很多了解。最近的研究使用了刺激属性(例如方向、运动方向和对比度)的参数操作来阐明注意力机制的形式。这些研究的结果并不总是一致。然而,这种不一致可能是由于考虑了注意力效应而引起的,例如对比度增益、响应增益或注意力引起的放电频率的基线偏移。在这里,七项基于空间和特征的注意力的研究,从 V4 和 MT 的猴子电生理学研究到人类视觉皮层的功能磁共振成像研究,在单一参数模型的背景下进行了重新评估,该模型结合了注意力影响神经元反应的多种方式。这项重新分析表明,大多数(尽管不是全部)这些结果都可以通过注意力机制的类似组合来解释。
Much has been learned over the past 25 years about how attention influences neuronal responses to stimuli in the visual cortex of monkeys and humans. The most recent studies have used parametric manipulations of stimulus attributes such as orientation, direction of motion, and contrast to elucidate the form of the attentional mechanism. The results of these studies do not always agree. However, some of this inconsistency may be caused which attentional effects are considered, such as contrast gain, response gain, or a baseline shift in firing rate with attention. Here, seven studies of spatial and feature-based attention, ranging from monkey electrophysiological studies in V4 and MT to fMRI studies in human visual cortex, are reevaluated in the context of a single parametric model that incorporates a variety of ways in which attention can influence neuronal responses. This reanalysis shows that most, though not all, of these results can be explained by a similar combination of attentional mechanisms.
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