在重力轴和身体轴上运动的视网膜代码
Shai Sabbah1, John A Gemmer2, Ananya Bhatia-Lin1
1Department of Neuroscience, Brown University, Providence, Rhode Island 02912, USA.
Nature
|June 14, 2017
概括
鼠标视网膜中的方向敏感质细胞 (DSGC) 绘制特定的光流模式以检测自动运动. 这个神经元组编码翻译和旋转, 帮助平衡和图像稳定.
科学领域:
- 神经科学
- 视觉科学
- 感官系统
背景情况:
- 自动感知依赖于集成的视觉和前置输入来实现平衡和图像稳定.
- 自动运动的视觉处理涉及光学流,具有不同的转换和旋转模式.
研究的目的:
- 研究小鼠视网膜中方向敏感性质细胞 (DSGC) 的地形组织和方向调整.
- 确定DSGC如何编码不同类型的自动运动,包括转换和旋转.
主要方法:
- 在实验室分析鼠标的平面视网膜.
- 检查个别DSGC亚型的方向偏好.
- 对模拟光流场的细胞反应进行映射.
主要成果:
- DSGC表现出与特定的翻译光流场一致的地形方向偏好.
- 四个主要的翻译方向 (前进,后退,上升,下降) 与身体和引力轴对齐.
- 开启-DSGC和开启-关闭-DSGC都编码转换和旋转,具有不同的频道权重.
结论:
- 通过翻译和旋转来编码自动运动的神经元组.
- 自动运动的视网膜坐标系统与前庭系统不同.
- 这种细胞专业化有助于有效的导航和平衡.
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