Emotional perception: Correlation of functional MRI and event-related potentials
Emotional perception: Correlation of functional MRI and event-related potentials
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DOI：
10.1093/cercor/bhl017
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发表时间：
2007-05-01
期刊：
影响因子：
3.7
通讯作者：
Bradley, Margaret M.
中科院分区：
文献类型：
--
作者：
Sabatinelli, Dean;Lang, Peter J.;Bradley, Margaret M.
收集人类大脑活动的密集阵列电和功能性血流动力学测量，以评估两种已建立的情绪反应性神经测量之间的关系。在平行实验中，慢波晚期正电位（LPP）和视皮层血氧水平依赖（BOLD）信号都被图像唤醒的强度调节。LPP的振幅与枕侧、颞下和顶叶视觉区横跨图像内容的BOLD强度显著相关。模拟区域源的估计强度与区域BOLD强度没有显著相关。这些数据表明，在情绪性图像处理过程中，脑后部位的正慢波增强代表了视觉皮层结构回路的活动，反映了对视觉场景动机相关性的感知敏感性。
Dense-array electrocortical and functional hemodynamic measures of human brain activity were collected to assess the relationship between 2 established neural measures of emotional reactivity. Recorded in parallel sessions, the slow-wave late positive potential (LPP) and visual cortical blood oxygen level-dependent (BOLD) signals were both modulated by the rated intensity of picture arousal. The amplitude of the LPP correlated significantly with BOLD intensity in lateral occipital, inferotemporal, and parietal visual areas across picture contents. Estimated strength of modeled regional sources did not correlate significantly with regional BOLD intensity. These data suggest that the enhanced positive slow wave seen over posterior sites during emotional picture processing represents activity in a circuit of visual cortical structures, reflecting a perceptual sensitivity to the motivational relevance of visual scenes.