Morphing Marilyn into Maggie dissociates physical and identity face representations in the brain
Morphing Marilyn into Maggie dissociates physical and identity face representations in the brain
复制标题
DOI：
10.1038/nn1370
复制
发表时间：
2005-01-01
影响因子：
25
通讯作者：
Dolan, RJ
中科院分区：
文献类型：
--
作者：
Rotshtein, P;Henson, RNA;Dolan, RJ
大脑如何表现人脸的不同方面仍然存在争议。在这里，我们向受试者展示了从名人面孔对之间的连续变形中提取的刺激。在配对展示中，第二张脸可能与第一张脸完全相同，可能具有相同的感知身份但在物理上有所不同（30%沿着变形连续体），或者在物理上沿着连续体有相同的距离（30%）但在另一个方向上。我们发现，从行为上讲，受试者更有可能将第三组配对的面孔分类为不同的，而且这种效应在更熟悉面孔的受试者身上更为明显。在功能性磁共振成像（fMRI）中，枕下回（IOG）对物理变化而不是身份变化敏感，而右梭状回（FFG）对身份变化而不是物理变化敏感。双侧前颞区对身份变化的敏感性随实验前受试者对面孔的熟悉程度而变化。这些发现为面部感知的层次模型提供了神经生物学上的支持。
How the brain represents different aspects of faces remains controversial. Here we presented subjects with stimuli drawn from morph continua between pairs of famous faces. In the paired presentations, a second face could be identical to the first, could share perceived identity but differ physically (30% along the morph continuum), or could differ physically by the same distance along the continuum (30%) but in the other direction. We show that, behaviorally, subjects are more likely to classify face pairs in the third paired presentation as different and that this effect is more pronounced for subjects who are more familiar with the faces. In functional magnetic resonance imaging (fMRI), inferior occipital gyrus (IOG) shows sensitivity to physical rather than to identity changes, whereas right fusiform gyrus (FFG) shows sensitivity to identity rather than to physical changes. Bilateral anterior temporal regions show sensitivity to identity change that varies with the subjects' pre-experimental familiarity with the faces. These findings provide neurobiological support for a hierarchical model of face perception.