...
  • 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>The Journal of Neuroscience: The Official Journal of the Society for Neuroscience >The derivation of direction selectivity in the striate cortex.
【24h】

The derivation of direction selectivity in the striate cortex.

机译：条纹皮质中方向选择性的推导。

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

In the central visual pathway of binocular animals, the property of directional selectivity (DS) is first exhibited in striate cortex. In this study, we sought to determine the neural circuitry underlying the transformation from non-DS neurons to DS cortical cells. In a well established model, DS receptive fields (RFs) are derived from the sum of two non-DS inputs with 90 degrees (quadrature) spatiotemporal phase differences. We explored possible input sources for this model, which include non-DS simple cells and lateral geniculate nucleus (LGN) neurons, by examination of spatiotemporal RFs of single cells and of pairs of cells. We find that distributions of non-DS simple RFs do not match the temporal predictions of the quadrature model because of a lack of long-latency responses. The long-latency inputs could potentially arise from lagged LGN afferents. However, analysis of cell pairs indicates that DS cells receive cortical input from non-DS simple cells for both short- and long-latency components, with temporal phase differences typically <90 degrees. Furthermore, the distribution of minimum phase differences needed to generate DS cells overlaps that exhibited by non-DS simple cells. Considered together, these results are consistent with a linear model whereby DS simple cells are formed from simple-cell inputs, with temporal phase differences often less than quadrature.
机译：在双目动物的中央视觉通路中，方向选择性（DS）的属性首先在纹状皮质中表现出来。在这项研究中，我们试图确定从非DS神经元到DS皮质细胞转化的神经回路。在一个完善的模型中，DS接收场（RF）从具有90度（正交）时空相位差的两个非DS输入的总和中得出。我们通过检查单个细胞和细胞对的时空RF，探索了该模型的可能输入源，包括非DS单细胞和外侧膝状核（LGN）神经元。我们发现，由于缺乏长时延响应，非DS简单RF的分布与正交模型的时间预测不匹配。长时延输入可能来自滞后LGN传入。但是，对细胞对的分析表明，DS细胞从非DS单细胞接收短时和长时组分的皮质输入，时间相差通常<90度。此外，生成DS单元所需的最小相位差的分布与非DS简单单元所展现的重叠。一起考虑，这些结果与线性模型一致，线性模型中DS简单单元由简单单元输入形成，时间相位差通常小于正交。

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