Todd Rebecca M, Schmitz Taylor W, Susskind Josh, Anderson Adam K
Department of Psychology, University of Toronto Toronto, ON, Canada.
Front Behav Neurosci. 2013 May 6;7:40. doi: 10.3389/fnbeh.2013.00040. eCollection 2013.
It is well-known that emotionally salient events are remembered more vividly than mundane ones. Our recent research has demonstrated that such memory vividness (Mviv) is due in part to the subjective experience of emotional events as more perceptually vivid, an effect we call emotionally enhanced vividness (EEV). The present study built on previously reported research in which fMRI data were collected while participants rated relative levels of visual noise overlaid on emotionally salient and neutral images. Ratings of greater EEV were associated with greater activation in the amygdala and visual cortex. In the present study, we measured BOLD activation that predicted recognition Mviv for these same images 1 week later. Results showed that, after controlling for differences between scenes in low-level objective features, hippocampus activation uniquely predicted subsequent Mviv. In contrast, amygdala and visual cortex regions that were sensitive to EEV were also modulated by subsequent ratings of Mviv. These findings suggest shared neural substrates for the influence of emotional salience on perceptual and mnemonic vividness, with amygdala and visual cortex activation at encoding contributing to the experience of both perception and subsequent memory.
众所周知，情感突出的事件比平凡的事件记忆得更清晰。我们最近的研究表明，这种记忆清晰度（Mviv）部分归因于情感事件在感知上更生动的主观体验，我们将这种效应称为情感增强清晰度（EEV）。本研究建立在先前报道的研究基础上，在该研究中，当参与者对叠加在情感突出和中性图像上的视觉噪声的相对水平进行评分时，收集了功能磁共振成像（fMRI）数据。更高的EEV评分与杏仁核和视觉皮层的更大激活相关。在本研究中，我们测量了1周后预测这些相同图像识别Mviv的血氧水平依赖（BOLD）激活。结果表明，在控制了低水平客观特征场景之间的差异后，海马体激活唯一地预测了随后的Mviv。相比之下，对EEV敏感的杏仁核和视觉皮层区域也受到随后Mviv评分的调节。这些发现表明，情感突出对感知和记忆清晰度的影响具有共同的神经基础，编码时杏仁核和视觉皮层的激活有助于感知体验和随后的记忆。
