Form representation in monkey inferotemporal cortex is virtually unaltered by free viewing
Form representation in monkey inferotemporal cortex is virtually unaltered by free viewing
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DOI：
10.1038/77722
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发表时间：
2000-08-01
影响因子：
25
通讯作者：
Maunsell, JHR
中科院分区：
文献类型：
--
作者：
DiCarlo, JJ;Maunsell, JHR
在自然行为中，物体在大脑中是如何表现的？灵长类动物的视觉物体识别被认为依赖于下颞叶皮层（IT）。在IT的大多数神经生理学研究中，猴子在呈现孤立的视觉刺激时（受控观看）保持凝视方向固定。然而，在自然行为中，灵长类动物通过每秒多次改变凝视方向（自由观看）来视觉探索杂乱的环境。我们研究了自由观看对猴子进行形式识别任务的IT神经元反应的影响。通过进行小的实时刺激调整，我们在受控和自由观看期间产生了几乎相同的视网膜刺激。近90%的神经元反应不受自由观看的影响，平均刺激选择性不变。因此，可能构成形式识别基础的神经元表征几乎不受自由观看的影响。
How are objects represented in the brain during natural behavior? Visual object recognition in primates is thought to depend on the inferotemporal cortex (IT). In most neurophysiological studies of IT, monkeys hold their direction of gaze fixed while isolated visual stimuli are presented (controlled viewing). However, during natural behavior, primates visually explore cluttered environments by changing gaze direction several times each second (free viewing). We examined the effect of free viewing on IT neuronal responses in monkeys engaged in a form-recognition task. By making small, real-time stimulus adjustments, we produced nearly identically retinal stimulation during controlled and free viewing. Nearly 90% of neuronal responses were unaffected by free viewing, and average stimulus selectivity was unchanged. Thus, neuronal representations that likely underlie form recognition are virtually unaltered by free viewing.