Frontal cortex differentiates between free and imposed target selection in multiple-target search

Frontal cortex differentiates between free and imposed target selection in multiple-target search
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额叶皮层区分多目标搜索中的自由目标选择和强制目标选择

DOI:
10.1016/j.neuroimage.2019.116133
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发表时间:
2019
期刊:
影响因子:
5.7
通讯作者:
C.N.L.
C.N.L.
中科院分区:
医学1区
文献类型:
--
作者:
Fahrenfort;Reeder;Pollmann;Olivers;C.N.L.

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认知控制可以包括主动(预备)和反应(纠正)机制。使用与凝视相关的眼球跟踪范式,结合功能磁共振成像,我们研究了在多目标搜索中切换不同目标时,这些不同控制模式及其潜在神经网络的参与情况。参与者同时搜索出现在分心物中的两个可能的目标,并选择其中一个。在一种情况下,每个显示器中只有一个目标可用,因此选择是强制的,需要进行反应控制。在另一种情况下,两个目标都存在,让观察者在目标选择上有自由选择,并允许主动控制。只有在设定目标的时候,而不是在自由选择目标的时候,才会出现转换成本。我们发现,额顶控制网络的活动水平取决于目标开关是自由的还是强制的。此外,我们观察到默认模式网络的核心区域在靶重复期间是活跃的,这表明对这些试验的控制减少了。自由开关和强制开关共同激活顶叶和额叶后皮质,而自由开关额外激活前额叶皮质。这些发现突出了视觉搜索过程中主动控制和反应控制的独特贡献。
Cognitive control can involve proactive (preparatory) and reactive (corrective) mechanisms. Using a gaze-contingent eye tracking paradigm combined with fMRI, we investigated the involvement of these different modes of control and their underlying neural networks, when switching between different targets in multiple-target search. Participants simultaneously searched for two possible targets presented among distractors, and selected one of them. In one condition, only one of the targets was available in each display, so that the choice was imposed, and reactive control would be required. In the other condition, both targets were present, giving observers free choice over target selection, and allowing for proactive control. Switch costs emerged only when targets were imposed and not when target selection was free. We found differential levels of activity in the frontoparietal control network depending on whether target switches were free or imposed. Furthermore, we observed core regions of the default mode network to be active during target repetitions, indicating reduced control on these trials. Free and imposed switches jointly activated parietal and posterior frontal cortices, while free switches additionally activated anterior frontal cortices. These findings highlight unique contributions of proactive and reactive control during visual search.
缺乏自由选择揭示了特征维度内和跨特征维度的多目标搜索的成本
DOI: --
发表时间: 2018
期刊: Attention, Perception, & Psychophysics
影响因子: --
作者:
E. Ort;Johannes Jacobus Fahrenfort;C. Olivers
通讯作者: C. Olivers
DOI: 10.1093/oso/9780198866282.003.0013
发表时间: 2020-11
期刊: Neurocognitive Mechanisms
影响因子: --
作者:
G. Piccinini
通讯作者: G. Piccinini
DOI: 10.1093/cercor/12.11.1124
发表时间: 2002-11-01
期刊: CEREBRAL CORTEX
影响因子: 3.7
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Shulman, GL;d'Avossa, G;Corbetta, M
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DOI: 10.1007/s00429-010-0262-0
发表时间: 2010-06
影响因子: 3.1
作者:
Menon, Vinod;Uddin, Lucina Q.
通讯作者: Uddin, Lucina Q.
DOI: 10.1073/pnas.240460497
发表时间: 2000-11-21
影响因子: 11.1
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Sohn, MH;Ursu, S;Carter, CS
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