Alpha power increases in right parietal cortex reflects focused internal attention.
Alpha power increases in right parietal cortex reflects focused internal attention.
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DOI：
10.1016/j.neuropsychologia.2014.02.010
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发表时间：
2014-04
期刊：
影响因子：
2.6
通讯作者：
Neubauer, Aljoscha C.
中科院分区：
文献类型：
--
作者：
Benedek, Mathias;Schickel, Rainer J.;Jauk, Emanuel;Fink, Andreas;Neubauer, Aljoscha C.
这项研究调查了EEG α功率增加的功能意义，这一发现在各种记忆任务中，特别是在发散思维中一直被观察到。先前的研究表明，当在脑海中执行任务时，阿尔法功率会增加-例如，当阻止自底向上处理时。本研究旨在通过比较两个发散性思维任务（一个依赖自下而上的加工（感觉摄入任务），另一个不依赖自下而上的加工（感觉独立任务）），考察任务内隐差异对自下而上加工需求的影响。在这两项任务中，刺激被掩盖在一半的试验，以建立更高和更低的内部处理要求的条件。根据假设，内部处理影响性能，并导致增加的阿尔法功率只有在感觉摄入任务，而感觉独立的任务表现出高水平的任务相关的阿尔法功率在这两种情况下。有趣的是，涉及集中内部注意力的条件显示出明显的偏侧化，右半球的顶叶区域具有更高的阿尔法功率。考虑到fMRI研究的证据，右顶叶α功率的增加可能对应于右颞顶连接的失活，反映了腹侧注意网络的抑制。抑制该区域被认为可以防止在目标驱动的自上而下的行为中重新定向到不相关的刺激，这可能在要求较高的认知任务（如想法生成和心理意象）中起到任务屏蔽的执行功能。本研究探讨了EEG α活动的功能意义。右顶叶阿尔法功率增加作为内部注意力需求的函数。发散性思维中阿尔法能量的增加表明注意力集中。右顶叶α可能反映了腹侧注意力网络的活动。
This study investigated the functional significance of EEG alpha power increases, a finding that is consistently observed in various memory tasks and specifically during divergent thinking. It was previously shown that alpha power is increased when tasks are performed in mind—e.g., when bottom-up processing is prevented. This study aimed to examine the effect of task-immanent differences in bottom-up processing demands by comparing two divergent thinking tasks, one intrinsically relying on bottom-up processing (sensory-intake task) and one that is not (sensory-independence task). In both tasks, stimuli were masked in half of the trials to establish conditions of higher and lower internal processing demands. In line with the hypotheses, internal processing affected performance and led to increases in alpha power only in the sensory-intake task, whereas the sensory-independence task showed high levels of task-related alpha power in both conditions. Interestingly, conditions involving focused internal attention showed a clear lateralization with higher alpha power in parietal regions of the right hemisphere. Considering evidence from fMRI studies, right-parietal alpha power increases may correspond to a deactivation of the right temporoparietal junction, reflecting an inhibition of the ventral attention network. Inhibition of this region is thought to prevent reorienting to irrelevant stimulation during goal-driven, top-down behavior, which may serve the executive function of task shielding during demanding cognitive tasks such as idea generation and mental imagery. This study investigated the functional significance of EEG alpha activity. Right-parietal alpha power increased as a function of internal attention demands. Alpha power increases during divergent thinking indicates focused attention. Right-parietal alpha may reflect activity of the ventral attention network.
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影响因子：
3.6
作者：
Beaty, Roger E.;Silvia, Paul J.
通讯作者：
Silvia, Paul J.
影响因子：
5.7
作者：
Benedek M;Jauk E;Fink A;Koschutnig K;Reishofer G;Ebner F;Neubauer AC
通讯作者：
Neubauer AC
影响因子：
5.7
作者：
Berkowitz, Aaron L.;Ansari, Daniel
通讯作者：
Ansari, Daniel
影响因子：
4.8
作者：
Fink, Andreas;Grabner, Roland H.;Neubauer, Aljoscha C.
通讯作者：
Neubauer, Aljoscha C.
DOI：
10.1037/a0033644
发表时间：
2013-11-01
期刊：
Psychology of aesthetics, creativity, and the arts
影响因子：
--
作者：
Benedek M;Mühlmann C;Jauk E;Neubauer AC
通讯作者：
Neubauer AC