...
首页> 外文期刊>Neuron >Adaptive surround modulation in cortical area MT.
【24h】

Adaptive surround modulation in cortical area MT.

机译:皮质区域MT中的自适应环绕调制。

获取原文
获取原文并翻译 | 示例
           

摘要

Visual motion perception relies on two opposing operations: integration and segmentation. Integration overcomes motion ambiguity in the visual image by spatial pooling of motion signals, whereas segmentation identifies differences between adjacent moving objects. For visual motion area MT, previous investigations have reported that stimuli in the receptive field surround, which do not elicit a response when presented alone, can nevertheless modulate responses to stimuli in the receptive field center. The directional tuning of this "surround modulation" has been found to be mainly antagonistic and hence consistent with segmentation. Here, we report that surround modulation in area MT can be either antagonistic or integrative depending upon the visual stimulus. Both types of modulation were delayed relative to response onset. Our results suggest that the dominance of antagonistic modulation in previous MT studies was due to stimulus choice and that segmentation and integration are achieved, in part, via adaptive surround modulation.
机译:视觉运动感知依赖于两个相反的操作:集成和分段。积分通过运动信号的空间合并克服了视觉图像中的运动歧义,而分段识别了相邻运动对象之间的差异。对于视觉运动区域MT,先前的研究已经报道了感受野周围的刺激,当单独出现时不会引起反应,但是可以调节对感受野中心的刺激的反应。已经发现这种“周围调制”的方向性调节主要是对抗性的,因此与分段一致。在这里,我们报告说,根据视觉刺激,区域MT中的周围调制可以是拮抗的或整合的。相对于响应发作,两种类型的调节均被延迟。我们的研究结果表明,在以前的MT研究中,拮抗调节作用占主导地位是由于刺激选择,而分段和整合部分是通过自适应环绕调节来实现的。

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