Emotional Modulation of the Late Positive Potential during Picture Free Viewing in Older and Young Adults.
Emotional Modulation of the Late Positive Potential during Picture Free Viewing in Older and Young Adults.
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DOI：
10.1371/journal.pone.0162323
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发表时间：
2016
期刊：
影响因子：
3.7
通讯作者：
Bowers D
中科院分区：
文献类型：
--
作者：
Renfroe JB;Bradley MM;Sege CT;Bowers D
在老年人和大学生中研究了自由观看新颖的情感和中性场景时的享乐偏差。情绪图片处理的神经生理学指标-中央-顶叶晚期正电位（LPP）的振幅-使用密集的传感器阵列从头皮记录，而参与者（29名老年人; 21名大学生）观看情绪化的或平凡的自然场景，在特定的内容不同。学生和老年人表现出LPP增强时，观看情感，相比，中性的，场景，并有老年人和大学生之间的LPP幅度没有差异，当观看中性的日常场景。然而，与大学生相比，老年人在观看情绪场景时，无论是享乐价还是具体内容，LPP幅值都有所减弱。与年龄相关的差异可能是由反应性情绪唤醒随年龄的减少介导的，可能是由反复生活暴露于情绪刺激介导的。
Hedonic bias during free viewing of novel emotional and neutral scenes was investigated in older adults and college students. A neurophysiological index of emotional picture processing–the amplitude of the centroparietal late positive potential (LPP)–was recorded from the scalp using a dense sensor array while participants (29 older adults; 21 college students) viewed emotionally engaging or mundane natural scenes that varied in specific content. Both students and older adults showed LPP enhancement when viewing affective, compared to neutral, scenes, and there was no difference in LPP amplitude between older individuals and college students when viewing neutral everyday scenes. However, compared to the college students, older individuals showed attenuated LPP amplitude when viewing emotional scenes, regardless of hedonic valence or specific content. Age related differences could be mediated by a reduction in reactive emotional arousal with age, possible mediated by repeated life exposure to emotional stimuli.
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