潜意识和超意识处理情绪的面部表情：左右额区的脑振荡。
Subliminal and supraliminal processing of facial expression of emotions: brain oscillation in the left/right frontal area.
机构信息
Laboratory of Cognitive Psychology, Department of Psychology, Catholic University of Milan, Largo Gemelli, 1, 20123 Milan, Italy.
出版信息
Brain Sci. 2012 Mar 26;2(2):85-100. doi: 10.3390/brainsci2020085.
The unconscious effects of an emotional stimulus have been highlighted by a vast amount of research, whereover it remains questionable whether it is possible to assign a specific function to cortical brain oscillations in the unconscious perception of facial expressions of emotions. Alpha band variation was monitored within the right- and left-cortical side when subjects consciously (supraliminal stimulation) or unconsciously (subliminal stimulation) processed facial patterns. Twenty subjects looked at six facial expressions of emotions (anger, fear, surprise, disgust, happiness, sadness, and neutral) under two different conditions: supraliminal (200 ms) vs. subliminal (30 ms) stimulation (140 target-mask pairs for each condition). The results showed that conscious/unconscious processing and the significance of the stimulus can modulate the alpha power. Moreover, it was found that there was an increased right frontal activity for negative emotions vs. an increased left response for positive emotion. The significance of facial expressions was adduced to elucidate cortical different responses to emotional types.
大量研究强调了情绪刺激的无意识影响，但仍存在争议的是，在无意识感知情绪面部表情时，皮质脑振荡是否可能具有特定功能。当被试有意识地（超阈刺激）或无意识地（阈下刺激）处理面部模式时，监测右和左皮质侧的α波段变化。二十名受试者在两种不同条件下观看六种情绪的面部表情（愤怒、恐惧、惊讶、厌恶、快乐、悲伤和中性）：超阈（200 毫秒）与阈下（30 毫秒）刺激（每种条件下各有 140 个目标-掩蔽对）。结果表明，意识/无意识处理和刺激的显著性可以调节α功率。此外，还发现，负性情绪的右额活动增加，而正性情绪的左额反应增加。提出面部表情的显著性来阐明对不同情绪类型的皮质不同反应。
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