Affective perception and imagery: A NIRS study
Affective perception and imagery: A NIRS study
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DOI：
10.1016/j.ijpsycho.2011.03.006
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发表时间：
2011-06-01
影响因子：
3
通讯作者：
Schienle, Anne
中科院分区：
文献类型：
--
作者：
Koechel, Angelika;Plichta, Michael M.;Schienle, Anne
情绪图片加工过程中皮层注意网络的激活已经得到了广泛的研究，而对情绪图片的激活知之甚少。目前尚不清楚情绪刺激内容的差异是否能够调节成像过程中视觉皮质的激活。此外，情绪反应能力和表象能力的个体差异还没有被研究。本实验的目的是通过近红外光谱(NIRS)来检测这些过程。35名健康成年人被要求观看情绪(厌恶和快乐)和中性图片，然后在多通道近红外光谱记录中将其可视化。我们的主要结果表明，在情绪图片的知觉和想象中，顶区和枕区的参与是不同的。总体而言，画面知觉刺激枕区含氧血红蛋白的增加，而想象与顶区的增加有关。情绪内容调节了图片知觉和想象过程中左枕叶皮质的激活。与中性的图片相比，情绪化的图片(厌恶和快乐)会激发更多的激活。此外，受试者的自我表象能力与其在情感表象时的枕叶激活呈正相关。因此，枕骨激活可能对成像质量至关重要。相比之下，与情绪特征(如特质厌恶)和氧合作用的所有相关性都不显著，这可能是因为这些人格因素主要调节皮质下边缘结构的激活，而近红外光谱无法接触到这些结构。(C)2011爱思唯尔B.V.保留所有权利。
The activation of cortical attention networks during affective picture processing has been extensively studied, whereas little is known about affective imagery. It is still unclear whether differences in emotional stimulus content are able to modulate visual cortex activation during imagery. Moreover, individual differences in emotional reactivity and imagery ability have not been investigated.The aim of this experiment was to examine these processes by means of near-infrared spectroscopy (NIRS). Thirty-five healthy adults were instructed to look at affective (disgust and happy) and neutral pictures and afterwards visualize them during multi-channel NIRS recording.Our main results indicated a differential involvement of parietal and occipital areas in the perception and imagery of affective pictures. In general, picture perception provoked increased oxygenated hemoglobin in occipital regions, whereas imagery was associated with an increase in parietal areas. Emotional content modulated activation of the left occipital cortex during both picture perception and imagery. Affective pictures (disgust and happy) provoked greater activation compared to neutral ones. Additionally, the self-rated imagery ability of the participants was positively correlated with their occipital activation during affective imagery. Thus, occipital activation might be crucial for the quality of imagery. In contrast, all correlations with emotional traits (e.g. trait disgust) and oxygenation were nonsignificant, which might be due to the fact that those personality factors predominantly modulate the activation of subcortical limbic structures which are not accessible with NIRS. (C) 2011 Elsevier B.V. All rights reserved.