Serial, covert shifts of attention during visual search are reflected by the frontal eye fields and correlated with population oscillations.
Serial, covert shifts of attention during visual search are reflected by the frontal eye fields and correlated with population oscillations.
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DOI：
10.1016/j.neuron.2009.06.020
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发表时间：
2009-08-13
期刊：
影响因子：
16.2
通讯作者：
Miller, Earl K.
中科院分区：
文献类型：
--
作者：
Buschman, Timothy J.;Miller, Earl K.
注意力将大量的感官信息调节为可管理的信息流，因此理解注意力是如何被控制的是理解认知的核心。相互竞争的理论认为，视觉搜索涉及连续和/或平行的注意力分配，但几乎没有直接的神经证据支持这两种机制。两只猴子被训练在视觉搜索（内源性）和弹出（外源性）条件下秘密搜索一组目标刺激。在这里，我们提出神经证据在额眼场（FEF）连续，隐蔽的注意力转移在搜索，而不是弹出。此外，FEF尖峰活动反映的注意力转移与局部场电位的18-34 Hz振荡相关，表明存在“时钟”信号。这提供了直接的神经证据，证明灵长类动物可以自发地采用连续搜索策略，这些连续的隐蔽注意力转移是由FEF指导的。它还表明，神经元群的振荡可能会调节认知处理的时间。
Attention regulates the flood of sensory information into a manageable stream, and so understanding how attention is controlled is central to understanding cognition. Competing theories suggest visual search involves serial and/or parallel allocation of attention, but there is little direct, neural, evidence for either mechanism. Two monkeys were trained to covertly search an array for a target stimulus under visual search (endogenous) and pop-out (exogenous) conditions. Here we present neural evidence in the frontal eye fields (FEF) for serial, covert shifts of attention during search but not pop-out. Furthermore, attention shifts reflected in FEF spiking activity were correlated with 18–34 Hz oscillations in the local field potential, suggesting a ‘clocking’ signal. This provides direct neural evidence that primates can spontaneously adopt a serial search strategy and that these serial covert shifts of attention are directed by the FEF. It also suggests that neuron population oscillations may regulate the timing of cognitive processing.
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DOI：
10.1523/jneurosci.1776-08.2008
发表时间：
2008-10-01
期刊：
The Journal of neuroscience : the official journal of the Society for Neuroscience
影响因子：
--
作者：
Bressler SL;Tang W;Sylvester CM;Shulman GL;Corbetta M
通讯作者：
Corbetta M
影响因子：
56.9
作者：
FUSTER, JM;ALEXANDER, GE
通讯作者：
ALEXANDER, GE
影响因子：
56.9
作者：
Buschman, Timothy J.;Miller, Earl K.
通讯作者：
Miller, Earl K.
影响因子：
25
作者：
Bichot, NP;Schall, JD
通讯作者：
Schall, JD
影响因子：
4.8
作者：
Casey, BJ;Forman, SD;Noll, DC
通讯作者：
Noll, DC