Modulation of the face- and body-selective visual regions by the motion and emotion of point-light face and body stimuli
Modulation of the face- and body-selective visual regions by the motion and emotion of point-light face and body stimuli
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DOI：
10.1016/j.neuroimage.2011.08.073
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发表时间：
2012-01-16
期刊：
影响因子：
5.7
通讯作者：
Smithson, Hannah E.
中科院分区：
文献类型：
--
作者：
Atkinson, Anthony P.;Vuong, Quoc C.;Smithson, Hannah E.
在高度形态退化的点光显示器中，对面部或身体形态有选择性的神经区域也会对面部或身体运动做出反应。然而，目前尚不清楚这些面部选择性和身体选择性区域是否对人类运动敏感，而不管刺激类型（面部和身体）或其专有刺激类别的特定运动相关线索。使用功能磁共振成像，我们表明，面部和身体的运动选择性地激活那些神经元的群体，为面部和身体的静态结构编码。身体（与面部）运动激活身体选择性EBA双边和右，但不是左FBA，无论观察者判断的情绪或颜色变化的点光愤怒，快乐和中性刺激。面部（与身体）运动激活面部选择性的右和左FFA，但只有在情绪判断的右FFA。此外，点光机构与面孔的响应强度与静态机构的体素选择性呈正相关，而不是面孔，而点光面孔的响应强度与静态面孔的体素选择性呈正相关，而不是机构。情绪内容进行的点光形式从运动线索是足够的，以提高活动的几个地区，包括双边EBA和右侧FFA和FBA。然而，虽然情绪调制的强度在右和左EBA的点光身体运动相关的程度voxelwise的选择性静态的机构，而不是静态的面孔，没有证据表明，情绪调制在梭状皮质发生在类似的刺激类别选择性的方式。后一个发现强烈限制了情绪表达运动精确调节那些为所观察的刺激类别编码的神经元群体的说法。(C)2011 Elsevier Inc. All rights reserved.
Neural regions selective for facial or bodily form also respond to facial or bodily motion in highly form-degraded point-light displays. Yet it is unknown whether these face-selective and body-selective regions are sensitive to human motion regardless of stimulus type (faces and bodies) or to the specific motion-related cues characteristic of their proprietary stimulus categories. Using fMRI, we show that facial and bodily motions activate selectively those populations of neurons that code for the static structure of faces and bodies. Bodily (vs. facial) motion activated body-selective EBA bilaterally and right but not left FBA, irrespective of whether observers judged the emotion or color-change in point-light angry, happy and neutral stimuli. Facial (vs. bodily) motion activated face-selective right and left FFA, but only during emotion judgments for right FFA. Moreover, the strength of responses to point-light bodies vs. faces positively correlated with voxelwise selectivity for static bodies but not faces, whereas the strength of responses to point-light faces positively correlated with voxelwise selectivity for static faces but not bodies. Emotional content carried by point-light form-from-motion cues was sufficient to enhance the activity of several regions, including bilateral EBA and right FFA and FBA. However, although the strength of emotional modulation in right and left EBA by point-light body movements was related to the degree of voxelwise selectivity to static bodies but not static faces, there was no evidence that emotional modulation in fusiform cortex occurred in a similarly stimulus category-selective manner. This latter finding strongly constrains the claim that emotionally expressive movements modulate precisely those neuronal populations that code for the viewed stimulus category. (C) 2011 Elsevier Inc. All rights reserved.