Temporal and spatial neural dynamics in the perception of basic emotions from complex scenes
Temporal and spatial neural dynamics in the perception of basic emotions from complex scenes
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DOI：
10.1093/scan/nst164
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发表时间：
2014-11-01
影响因子：
4.2
通讯作者：
Tamietto, Marco
中科院分区：
文献类型：
--
作者：
Costa, Tommaso;Cauda, Franco;Tamietto, Marco
情绪的不同时间动态对于理解它们在调节与周围环境的相互作用中的进化作用至关重要。在这里，我们调查的时间动态感知的四个基本情绪从复杂的场景变化的效价和唤醒（恐惧，厌恶，幸福和悲伤）与毫秒时间分辨率的脑电图（EEG）。事件相关电位计算和每种情绪表现出特定的时间轮廓，从中性场景的显着差异的不同时间段所揭示的。恐惧感知在最早的时间段引起显著的活动，其次是厌恶，快乐和悲伤。此外，恐惧，厌恶和快乐的特点是两个时间段的显着活动，而悲伤只有一个长潜伏期的时间段的活动。多维尺度被用来评估神经时间动力学和主观经验引起的四种情绪在随后的行为任务之间的对应关系。我们发现这两类数据之间具有高度的一致性，表明定义情绪的心理类别在神经时间动力学方面在大脑水平上具有密切的对应关系。最后，我们用低分辨率脑电磁断层扫描定位了每种情绪和时间段的时间依赖性活动的大脑区域。恐惧和厌恶表现出广泛分布的激活，主要是在右半球。快乐时激活的区域主要在左脑，而悲伤时在晚潜伏期激活的区域数量有限。目前的研究结果表明，基本情绪的神经签名可以作为动态时空大脑网络的副产品出现，而不是在处理一种特定情绪时唯一涉及的时间无关区域。
The different temporal dynamics of emotions are critical to understand their evolutionary role in the regulation of interactions with the surrounding environment. Here, we investigated the temporal dynamics underlying the perception of four basic emotions from complex scenes varying in valence and arousal (fear, disgust, happiness and sadness) with the millisecond time resolution of Electroencephalography (EEG). Event-related potentials were computed and each emotion showed a specific temporal profile, as revealed by distinct time segments of significant differences from the neutral scenes. Fear perception elicited significant activity at the earliest time segments, followed by disgust, happiness and sadness. Moreover, fear, disgust and happiness were characterized by two time segments of significant activity, whereas sadness showed only one long-latency time segment of activity. Multidimensional scaling was used to assess the correspondence between neural temporal dynamics and the subjective experience elicited by the four emotions in a subsequent behavioral task. We found a high coherence between these two classes of data, indicating that psychological categories defining emotions have a close correspondence at the brain level in terms of neural temporal dynamics. Finally, we localized the brain regions of time-dependent activity for each emotion and time segment with the low-resolution brain electromagnetic tomography. Fear and disgust showed widely distributed activations, predominantly in the right hemisphere. Happiness activated a number of areas mostly in the left hemisphere, whereas sadness showed a limited number of active areas at late latency. The present findings indicate that the neural signature of basic emotions can emerge as the byproduct of dynamic spatiotemporal brain networks as investigated with millisecond-range resolution, rather than in time-independent areas involved uniquely in the processing one specific emotion.