• 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Nature >VISUAL FEATURE SELECTIVITY IN FRONTAL EYE FIELDS INDUCED BY EXPERIENCE IN MATURE MACAQUES
【24h】

VISUAL FEATURE SELECTIVITY IN FRONTAL EYE FIELDS INDUCED BY EXPERIENCE IN MATURE MACAQUES

机译：成熟猕猴的经验诱发的前眼视野的视觉特征选择性

获取原文
获取原文并翻译 | 示例
           
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

WHEN examining a complex image, the eye movements of expert observers differ from those of novices; experts have learned to ignore features that are visually salient but are not relevant to the interpretation of the image(1-3). We have studied the neural basis of this form of perceptual-motor learning using monkeys that have learned to search for a visual target among distracters, Monkeys trained to search only for, say, a red stimulus among green distracters will ignore green stimuli even if they subsequently appear as targets in a complementary search array, that is, among red distracters, We recorded from neurons in the frontal eye field (FEF), a cortical area that responds to visual stimuli and controls purposive eye movements(4-6). Normally, FEF neurons do not exhibit feature selectivity, but their activity evolves to signal the target for an incipient eye movement(7). In monkeys trained exclusively on targets of one colour, however, FEF neurons show selectivity for stimuli of that colour, Because this selective response occurs so soon after presentation of the stimulus array, and is independent of location within the visual field, we propose that it reflects a form of experience-dependent plasticity that mediates the learning of arbitrary stimulus-response associations. [References: 24]
机译：当检查复杂的图像时，专业观察者的眼动与新手不同。专家们学会了忽略视觉上显着但与图像解释无关的特征（1-3）。我们已经研究了这种形式的知觉运动学习的神经基础，这些猴子已经学会了在干扰物中寻找视觉目标，受过训练的猴子只能搜索例如绿色干扰物中的红色刺激，即使它们会忽略绿色刺激。随后在互补搜索阵列中（即红色干扰物）作为目标出现，我们从额叶视野（FEF）的神经元中记录下来，该区域是对视觉刺激做出响应并控制有目的的眼球运动的皮质区域（4-6）。通常，FEF神经元不表现出特征选择性，但它们的活动会演变为向目标发出指示，以指示眼睛开始运动（7）。然而，在专门针对一种颜色的目标进行训练的猴子中，FEF神经元显示出对该颜色刺激的选择性，因为这种选择性反应在出现刺激阵列后不久就发生了，并且与视野内的位置无关，因此我们建议反映了一种依赖于经验的可塑性，这种可塑性可介导学习任意的刺激-反应联想。 [参考：24]

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号