Institute of Biomedical Sciences Abel Salazar, University of Porto (ICBAS-UP), Psychosocial Rehabilitation Lab, Faculty of Psychology and Educational Sciences, University of Porto/School of Allied Health Sciences, Polytechnic of Porto (LABRP, ESTSP-IPP/FPCEUP), Porto, Portugal.
Brain Imaging Network Portugal/National Association of Functional Brain Imaging (BING/ANIFC), Coimbra, Portugal.
NeuroRehabilitation. 2013;33(4):505-12. doi: 10.3233/NRE-130987.
Examining changes in brain activation linked with emotion-inducing stimuli is essential to the study of emotions. Due to the ecological potential of techniques such as virtual reality (VR), inspection of whether brain activation in response to emotional stimuli can be modulated by the three-dimensional (3D) properties of the images is important.
The current study sought to test whether the activation of brain areas involved in the emotional processing of scenarios of different valences can be modulated by 3D. Therefore, the focus was made on the interaction effect between emotion-inducing stimuli of different emotional valences (pleasant, unpleasant and neutral valences) and visualization types (2D, 3D). However, main effects were also analyzed.
The effect of emotional valence and visualization types and their interaction were analyzed through a 3 × 2 repeated measures ANOVA. Post-hoc t-tests were performed under a ROI-analysis approach.
The results show increased brain activation for the 3D affective-inducing stimuli in comparison with the same stimuli in 2D scenarios, mostly in cortical and subcortical regions that are related to emotional processing, in addition to visual processing regions.
This study has the potential of clarify brain mechanisms involved in the processing of emotional stimuli (scenarios' valence) and their interaction with three-dimensionality.
研究与情绪诱发刺激相关的大脑激活变化对于情绪研究至关重要。由于虚拟现实（VR）等技术的生态潜力，检查大脑对情绪刺激的反应是否可以通过图像的三维（3D）特性进行调节非常重要。
本研究旨在测试不同情绪效价的场景的情绪处理中涉及的大脑区域的激活是否可以通过 3D 进行调节。因此，重点关注不同情绪效价（愉快、不愉快和中性效价）和可视化类型（2D、3D）的情绪诱导刺激之间的交互作用。然而，也分析了主要效应。
通过 3×2 重复测量方差分析来分析情绪效价和可视化类型及其相互作用的影响。在 ROI 分析方法下进行事后 t 检验。
结果表明，与 2D 场景中的相同刺激相比，3D 情感诱发刺激会引起大脑的激活增加，主要在与情绪处理相关的皮质和皮质下区域以及视觉处理区域。
这项研究有潜力阐明处理情绪刺激（场景效价）的大脑机制及其与三维性的相互作用。
