Temporal and spectral dynamics underlying cognitive control modulated by task-irrelevant stimulus-response learning

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• 作者：Yanan Cao ; Xiangyi Cao ; Zhenzhu Yue…
• 关键词：Cognitive control ; Proportion congruency effect ; Stimulus ; response associations ; Theta band activity ; Lateralized readiness potential
• 刊名：Cognitive, Affective, & Behavioral Neuroscience
• 出版年：2017
• 出版时间：February 2017
• 年：2017
• 卷：17
• 期：1
• 页码：158-173
• 全文大小：
• 刊物主题：Cognitive Psychology; Neurosciences;
• 出版者：Springer US
• ISSN：1531-135X
• 卷排序：17

文摘

Behavioral and recent neuroimaging findings have shown reversal of interference effects due to manipulating proportion congruency (PC), which suggests that task-irrelevant stimulus-response (S-R) associations are strengthened and applied to predict responses. However, it is unclear how the strengthened S-R associations are represented and applied in the brain. We investigated with a between-subjects PC paradigm of the Hedge and Marsh task using electroencephalography (EEG). The behavioral results showed the reversal of the conflict effects, suggesting that task-irrelevant S-R associations were strengthened and used to prepare responses. The EEG results revealed the PC-related reversal of the conflict effects in the frontocentral N2 and parietal P3b amplitudes. Time-frequency analyses showed more pronounced PC-related reversal of the conflict effects in theta band (4–8 Hz) activity in frontocentral sites. These results suggest that the strengthened S-R associations due to PC manipulation modulated cognitive control. Importantly, the amplitude of lateralized readiness potential was higher in the high-PC condition than in the low-PC condition, suggesting that the strengthened short-term-memory spatial S-R associations that modulated cognitive control were applied similarly to long-term-memory spatial S-R associations.