在Drosophila中央综合体中的特征检测和定位调整
Johannes D Seelig1, Vivek Jayaraman
1Janelia Farm Research Campus, Howard Hughes Medical Institute, 19700 Helix Drive, Ashburn, Virginia 20147, USA.
Nature
|October 11, 2013
概括
果使用其中央复杂的大脑区域来处理用于导航的视觉地标. 这个区域内的环神经元对视觉特征作出反应,有助于空间记忆和运动控制.
科学领域:
- 神经科学是一个神经科学.
- 动物行为 动物行为
- 视觉处理 视觉处理
背景情况:
- 动物使用视觉地标来定位方向.
- 在Drosophila melanogaster中,中央复合体对于视觉反应和记忆至关重要.
- 中央复合体中视觉特征的神经表现在很大程度上是未知的.
研究的目的:
- 研究Drosophila中心复合体中的环神经元如何代表视觉特征.
- 了解这些神经元在运动过程中的视觉运动反应中的作用.
主要方法:
- 双光子成像在固定头部行走和飞行中的Drosophila melanogaster.
- 探测中央复杂环神经元的视觉运动反应.
主要成果:
- 环神经元树突具有视觉反应和视网膜组织.
- 感受场表现出刺激和抑制子场,类似于哺乳动物视觉皮层.
- 神经元显示定向调,更喜欢垂直的特征,反应在飞行过程中减少,而不是走路.
结论:
- 环神经元编码行为相关的视觉特征用于空间定向.
- 这种编码使下游电路能够生成用于视觉引导操作的电机命令.
- 在视觉引导的动作选择中开辟了研究电路计算的途径.
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