Event-related induced frontal alpha as a marker of lateral prefrontal cortex activation during cognitive reappraisal.
Event-related induced frontal alpha as a marker of lateral prefrontal cortex activation during cognitive reappraisal.
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DOI：
10.3758/s13415-012-0107-9
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发表时间：
2012-12
期刊：
影响因子：
--
通讯作者：
Hajcak G
中科院分区：
文献类型：
--
作者：
Parvaz MA;MacNamara A;Goldstein RZ;Hajcak G
皮层电活动，通常用于跟踪认知重新评价对情绪刺激处理的影响，尚未被用于索引PFC介导的调节机制负责这些影响。在目前的研究中，我们研究了诱导额叶α（即，8 - 13 Hz），显示反映任务相关皮层区域的抑制和脱离，可以被量化以探索在认知重新评价期间特别增强的皮层激活。为了这个目的，44名参与者观看了不愉快和中性的图片，然后是听觉指令，要么继续观看图片，要么通过使图片看起来不那么情绪化来减少对图片的情绪反应（即，认知再评价）。与以前的工作，不愉快的中性图片相比，引起了更大的晚正电位（LPP）。也证实了以前的工作，中潜伏期LPP减少时，图片的认知重新评价。然而，目前的研究首次表明，虽然不愉快的图片引起更高的额叶阿尔法功率比中立的图片双边，额叶阿尔法功率降低（指示更多的激活和认知控制）在认知重新评估的两种图片类型在左半球。两者合计，LPP和事件相关的诱导额叶α的研究结果提供了独特的信息，不同的神经基板和认知过程的基础重新评价。
Electrocortical activity, typically used to track the effects of cognitive reappraisal on the processing of emotional stimuli, has not been used to index PFC-mediated regulatory mechanisms responsible for these effects. In the current study, we examined the novel possibility that induced frontal alpha (i.e., 8 – 13 Hz), shown to reflect the inhibition and disengagement of task-relevant cortical regions, may be quantified to explore cortical activation that is specifically enhanced during cognitive reappraisal. For this purpose, 44 participants viewed unpleasant and neutral pictures followed by auditory instructions to either continue viewing the picture or reduce emotional response to the picture by making the picture seem less emotional (i.e., cognitive reappraisal). In line with previous work, unpleasant compared to neutral pictures elicited a larger late positive potential (LPP). Also corroborating previous work, the mid-latency LPP was reduced when pictures were cognitively reappraised. However, the current study showed for the first time that whereas unpleasant pictures elicited higher frontal alpha power than the neutral pictures bilaterally, frontal alpha power was reduced (indicative of more activation and cognitive control) during cognitive reappraisal of both picture types over the left hemisphere. Taken together, the LPP and event-related induced frontal alpha findings contribute unique information about distinct neural substrates and cognitive processes underlying reappraisal.
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