Increased Alpha-Band Power during the Retention of Shapes and Shape-Location Associations in Visual Short-Term Memory.
Increased Alpha-Band Power during the Retention of Shapes and Shape-Location Associations in Visual Short-Term Memory.
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DOI：
10.3389/fpsyg.2011.00128
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发表时间：
2011
影响因子：
3.8
通讯作者：
Postle BR
中科院分区：
文献类型：
--
作者：
Johnson JS;Sutterer DW;Acheson DJ;Lewis-Peacock JA;Postle BR
探索神经振荡在认知中的作用的研究已经揭示了在延迟识别短期记忆任务的延迟期间α-波段（~8-14 Hz）功率的持续增加。这些增加已经被提出来反映抑制，例如，代表任务无关信息的皮层区域，或来自先前试验的潜在干扰表示。然而，另一种可能性是，延迟期α波段功率（DPABP）的升高反映了信息的选择和维护，而不是，或除了，任务无关的信息的抑制。在本研究中，我们探索了这些可能性，使用延迟识别范式，在该范式中，形状信息的存在和任务相关性被系统地操纵在试验块和脑电图被用来测量α波段功率。在第一个试验块中，参与者记住了用相同的黑色圆圈标记的位置。第二个区块具有相同的指示，但位置由独特的形状标记。第三个区块的特征是与第二个区块相同的刺激呈现，但在逐个试验的基础上，有预试验指示，是否需要形状或位置的记忆，其他维度无关紧要。在最后一个区块中，参与者记住了每个刺激的形状和位置的独特配对。结果显示，在每一个位置记忆条件下，无论位置是用相同的圆圈标记还是用独特的任务无关的形状标记，DABP都是最小的。与此相反，α-波段功率的增加，观察到在形状记忆条件下，其中位置是任务无关的，并在关键的最终条件下，其中形状和位置都是任务相关的。这些结果提供了支持的建议，α-波段振荡反映了形状信息和/或形状位置协会在短期记忆中的保留。
Studies exploring the role of neural oscillations in cognition have revealed sustained increases in alpha-band (~8–14 Hz) power during the delay period of delayed-recognition short-term memory tasks. These increases have been proposed to reflect the inhibition, for example, of cortical areas representing task-irrelevant information, or of potentially interfering representations from previous trials. Another possibility, however, is that elevated delay-period alpha-band power (DPABP) reflects the selection and maintenance of information, rather than, or in addition to, the inhibition of task-irrelevant information. In the present study, we explored these possibilities using a delayed-recognition paradigm in which the presence and task relevance of shape information was systematically manipulated across trial blocks and electroencephalographic was used to measure alpha-band power. In the first trial block, participants remembered locations marked by identical black circles. The second block featured the same instructions, but locations were marked by unique shapes. The third block featured the same stimulus presentation as the second, but with pretrial instructions indicating, on a trial-by-trial basis, whether memory for shape or location was required, the other dimension being irrelevant. In the final block, participants remembered the unique pairing of shape and location for each stimulus. Results revealed minimal DPABP in each of the location-memory conditions, whether locations were marked with identical circles or with unique task-irrelevant shapes. In contrast, alpha-band power increases were observed in both the shape-memory condition, in which location was task irrelevant, and in the critical final condition, in which both shape and location were task relevant. These results provide support for the proposal that alpha-band oscillations reflect the retention of shape information and/or shape–location associations in short-term memory.
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DOI：
10.1016/s0926-6410(98)00056-1
发表时间：
1999-03-01
期刊：
COGNITIVE BRAIN RESEARCH
影响因子：
--
作者：
Klimesch, W;Doppelmayr, M;Winkler, T
通讯作者：
Winkler, T
影响因子：
56.9
作者：
STERNBERG, S
通讯作者：
STERNBERG, S
影响因子：
5.3
作者：
Jokisch, Daniel;Jensen, Ole
通讯作者：
Jensen, Ole
影响因子：
5.7
作者：
Hanslmayr, Simon;Aslan, Alp;Baeuml, Karl-Heinz
通讯作者：
Baeuml, Karl-Heinz
DOI：
10.1037/0278-7393.26.3.683
发表时间：
2000-05-01
影响因子：
2.6
作者：
Jiang, YH;Olson, IR;Chun, MM
通讯作者：
Chun, MM