Parallel processing of general and specific threat during early stages of perception.
Parallel processing of general and specific threat during early stages of perception.
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DOI：
10.1093/scan/nsv123
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发表时间：
2016-03
影响因子：
4.2
通讯作者：
Yuqi You;Wen Li
中科院分区：
文献类型：
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作者：
Yuqi You;Wen Li
对威胁的差异处理最早可以在刺激后100毫秒内完成。此外，早期知觉不仅区分威胁和非威胁刺激，而且还区分不同的威胁亚型(如恐惧、厌恶和愤怒)。结合空间频率滤波的恐惧、厌恶和中性场景图像与高密度事件相关电位和颅内来源估计，我们研究了一般和特定威胁加工在知觉早期的神经基础。在较低的空间频率下，恐惧和厌恶的图像引发了具有类似增强的N1电位和背侧视觉(颞叶中回)皮质活动的汇聚视觉反应(相对于中性提示；峰值在156毫秒)。然而，在高空间频率下，恐惧和厌恶引起了不同的视觉反应，恐惧的增强和厌恶抑制了P1电位和腹侧视觉(枕叶梭形)皮质活动(在121ms达到峰值)。因此，一般和特定威胁的加工在早期知觉中是并行进行的，腹侧视觉通路参与离散威胁的特定加工，背侧视觉通路在一般威胁加工中进行。此外，通过有选择地调谐到不同的空间-频率通道和视觉路径，这些并行过程支持维度和类别的威胁表征，促进有效的威胁应对。因此，这些发现为混合情绪模型提供了支持。
Differential processing of threat can consummate as early as 100 ms post-stimulus. Moreover, early perception not only differentiates threat from non-threat stimuli but also distinguishes among discrete threat subtypes (e.g. fear, disgust and anger). Combining spatial-frequency-filtered images of fear, disgust and neutral scenes with high-density event-related potentials and intracranial source estimation, we investigated the neural underpinnings of general and specific threat processing in early stages of perception. Conveyed in low spatial frequencies, fear and disgust images evoked convergent visual responses with similarly enhanced N1 potentials and dorsal visual (middle temporal gyrus) cortical activity (relative to neutral cues; peaking at 156 ms). Nevertheless, conveyed in high spatial frequencies, fear and disgust elicited divergent visual responses, with fear enhancing and disgust suppressing P1 potentials and ventral visual (occipital fusiform) cortical activity (peaking at 121 ms). Therefore, general and specific threat processing operates in parallel in early perception, with the ventral visual pathway engaged in specific processing of discrete threats and the dorsal visual pathway in general threat processing. Furthermore, selectively tuned to distinctive spatial-frequency channels and visual pathways, these parallel processes underpin dimensional and categorical threat characterization, promoting efficient threat response. These findings thus lend support to hybrid models of emotion.