Finding a face in the crowd: parallel and serial neural mechanisms of visual selection

被引:20
作者
Bichot, Narcisse P. [1 ]
Desimone, Robert [1 ]
机构
[1] MIT, McGovern Inst Brain Res, Cambridge, MA 02139 USA
来源
VISUAL PERCEPTION, PT 2: FUNDAMENTALS OF AWARENESS: MULTI-SENSORY INTEGRATION AND HIGH-ORDER PERCEPTION | 2006年 / 155卷
关键词
attention; selection; saccades; visual search; serial; parallel; area V4; synchrony;
D O I
10.1016/S0079-6123(06)55009-5
中图分类号
Q189 [神经科学];
学科分类号
071006 ;
摘要
At any given moment, our visual system is confronted with more information than it can process. Thus, attention is needed to select behaviorally relevant information in a visual scene for further processing. Behavioral studies of attention during visual search have led to the distinction between serial and parallel mechanisms of selection. To find a target object in a crowded scene, for example a "face in a crowd", the visual system might turn on and off the neural representation of each object in a serial fashion, testing each representation against a template of the target object. Alternatively, it might allow the processing of all objects in parallel, but bias activity in favor of those neurons representing critical features of the target, until the target emerges from the background. Recent neurophysiological evidence shows that both serial and parallel selections take place in neurons of the ventral "object-recognition pathway" during visual search tasks in which monkeys freely scan complex displays to find a target object. Furthermore, attentional selection appears to be mediated by changes in the synchrony of responses of neuronal populations in addition to the modulation of the firing rate of individual neurons.
引用
收藏
页码:147 / 156
页数:10
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