Structural encoding of human and schematic faces: Holistic and part-based processes
Structural encoding of human and schematic faces: Holistic and part-based processes
复制标题
DOI：
10.1162/089892901753165854
复制
发表时间：
2001-10-01
影响因子：
3.2
通讯作者：
Bentin, S
中科院分区：
文献类型：
--
作者：
Sagiv, N;Bentin, S
的特异性和反应特性的纹外面部区域的范围进行了研究，通过比较的N170事件相关电位（ERP）组件引起的照片的自然面孔，逼真的肖像画，素描的脸，示意性的脸，和nonface有意义和无意义的视觉刺激。结果表明，当视觉刺激清楚地呈现人脸的概念时，N170可以区分人脸和非人脸刺激，但它不能区分不同的人脸类型：即使是由简单的线条片段组成的示意性人脸也会触发N170。然而，在第二个实验中，反转似乎有一个不同的效果，自然的脸，其中的脸组件是可用的，并在纯完形为基础的示意性的面孔：N170振幅增强时，自然的脸是颠倒的，但减少时，示意性的脸被倒置。倒置延迟N170峰值潜伏期的自然和示意性的面孔。总之，这些结果表明，在人类大脑中的早期面部处理是由一个多组件的神经系统，其中整个面部配置和面部部分处理。这两个感知过程的相对参与可能取决于刺激的外貌值是否依赖于整体配置，或者个体成分是否可以与面孔相关联，即使在面孔背景之外。
The range of specificity and the response properties of the extrastriate face area were investigated by comparing the N170 event-related potential (ERP) component elicited by photographs of natural faces, realistically painted portraits, sketches of faces, schematic faces, and by nonface meaningful and meaningless visual stimuli. Results showed that the N170 distinguished between faces and nonface stimuli when the concept of a face was clearly rendered by the visual stimulus, but it did not distinguish among different face types: Even a schematic face made from simple line fragments triggered the N170. However, in a second experiment, inversion seemed to have a different effect on natural faces in which face components were available and on the pure gestalt-based schematic faces: The N170 amplitude was enhanced when natural faces were presented upside down but reduced when schematic faces were inverted. Inversion delayed the N170 peak latency for both natural and schematic faces. Together, these results suggest that early face processing in the human brain is subserved by a multiple-component neural system in which both whole-face configurations and face parts are processed. The relative involvement of the two perceptual processes is probably determined by whether the physiognomic value of the stimuli depends upon holistic configuration, or whether the individual components can be associated with faces even when presented outside the face context.