The role of temporal cortical areas in perceptual organization
The role of temporal cortical areas in perceptual organization
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DOI：
10.1073/pnas.94.7.3408
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发表时间：
1997-04-01
影响因子：
11.1
通讯作者：
Logothetis, NK
中科院分区：
文献类型：
--
作者：
Shenberg, DL;Logothetis, NK
灵长类动物颞叶的视觉区被认为是表征视觉对象的关键。为了研究这些区域在刺激的视觉意识中的作用，我们记录了训练猴子在观看模糊刺激时报告其感知的单个神经元的活动。视觉模糊是通过向两只眼睛呈现不一致的图像来诱导的，这种刺激条件已知会引发双眼竞争，在此期间，一个图像在给定时间被看到，而另一个图像在感知上被抑制，先前在经历双眼竞争的猴子的V1，V2，V4和MT区域的记录显示，只有一小部分纹状体和早期纹状体外神经元在看到驱动刺激时才放电，相比之下，颞下皮层和上级颞沟皮层视区几乎所有神经元的活动均被发现。视有效视觉刺激的感知优势而定，这些区域因此似乎代表了一个超越歧义解决的阶段，从而超越了感知分组和图像分割的过程，其中神经活动反映了大脑对物体的内部看法，而不是视网膜刺激对编码简单视觉特征或形状基元的细胞的影响。
The visual areas of the temporal lobe of the primate are thought to be essential for the representation of visual objects. To examine the role of these areas in the visual awareness of a stimulus, we recorded the activity of single neurons in monkeys trained to report their percepts when viewing ambiguous stimuli, Visual ambiguity was induced by presenting incongruent images to the two eyes, a stimulation condition known to instigate binocular rivalry, during which one image is seen at a given time while the other is perceptually suppressed, Previous recordings in areas V1, V2, V4, and MT of monkeys experiencing binocular rivalry showed that only a small proportion of striate and early extrastriate neurons discharge exclusively when the driving stimulus is seen, In contrast, the activity of almost all neurons in the inferior temporal cortex and the visual areas of the cortex of superior temporal sulcus was found to he contingent upon the perceptual dominance of an effective visual stimulus, These areas thus appear to represent a stage of professing beyond the resolution of ambiguities-and thus beyond the processes of perceptual grouping and image segmentation-where neural activity reflects the brain's internal view of objects, rather than the effects of the retinal stimulus on cells encoding simple visual features or shape primitives.