...
  • 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>The European Journal of Neuroscience >Spatial receptive field properties of lateral geniculate cells in the owl monkey (Aotus azarae) at different contrasts: a comparative study.
【24h】

Spatial receptive field properties of lateral geniculate cells in the owl monkey (Aotus azarae) at different contrasts: a comparative study.

机译：猫头鹰猴（Aotus azarae）外侧膝状肌细胞在不同对比度下的空间感受野特性：一项比较研究。

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

Several physiological properties of owl monkey lateral geniculate nucleus (LGN) cells were studied to verify whether its nocturnal habit has an influence on the organization of its subcortical visual system. Receptive field (RF) dimensions were measured using drifting gratings and bipartite field stimuli. We found that owl monkey cells LGN have larger RFs and were on average more non-linear than those of diurnal monkeys. But, as in other anthropoids, there is an increase in RF centre size with increasing eccentricity, and there is a limited correlation between these centre sizes and retinal ganglion cell dendritic tree sizes. The influence of contrast on sizes and peak sensitivities of RF centres and surrounds and on the response phases was studied. Both the sizes and peak sensitivities of the RF centres and surrounds decrease as contrast increases. As a result, the responses to low spatial frequency stimuli saturate with increasing contrast. Estimates of contrasts at half-maximal responses confirm thepresence of saturation. It was found that the magnocellular cells saturate more strongly than parvocellular cells. The response phase increases with increasing contrast. These data resemble those obtained in the common marmoset, indicating that these are basic features of the primate visual system. We conclude that during evolution and as an adaptation to a nocturnal lifestyle, cells in the owl monkey LGN display an increased spatial integration in comparison with diurnal primate species, without a change in the basic organization common to the primate subcortical visual system.
机译：研究了猫头鹰猴外侧膝状核（LGN）细胞的几种生理特性，以验证其夜间习惯是否对其皮层下视觉系统的组织产生影响。接收场（RF）尺寸是使用漂移光栅和二分场刺激来测量的。我们发现猫头鹰猴细胞LGN具有比昼夜猴更大的RF，并且平均而言更非线性。但是，与其他类人猿一样，RF中心的大小随离心率的增加而增加，并且这些中心的大小与视网膜神经节细胞树突状树的大小之间的相关性有限。研究了对比度对射频中心和周围环境的大小和峰值灵敏度以及响应相位的影响。 RF中心和周围的大小和峰值灵敏度都随对比度的增加而减小。结果，对低空间频率刺激的响应随着对比度的增加而饱和。在最大响应一半处的对比度估计值证实了饱和度的存在。已经发现，巨细胞细胞比小细胞细胞饱和更强烈。响应阶段随着对比度的增加而增加。这些数据类似于在普通mar猴中获得的数据，表明这些是灵长类动物视觉系统的基本特征。我们得出的结论是，在进化过程中以及作为对夜间生活方式的一种适应，与昼夜灵长类动物相比，猫头鹰LGN中的细胞显示出增加的空间整合，而没有改变灵长类动物皮层下视觉系统的基本组织。

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