Sun Compass Integration of Skylight Cues in Migratory Monarch Butterflies
Sun Compass Integration of Skylight Cues in Migratory Monarch Butterflies
复制标题
DOI：
10.1016/j.neuron.2010.12.025
复制
发表时间：
2011-01-27
期刊：
影响因子：
16.2
通讯作者：
Reppert, Steven M.
中科院分区：
文献类型：
--
作者：
Heinze, Stanley;Reppert, Steven M.
迁徙的帝王蝶（Danaus plexippus）使用一个时间补偿的太阳指南针从北美东部导航到墨西哥中部的越冬地。在这里，我们描述了蝴蝶中央复合体的神经元布局，这些方面可能建立了内部太阳罗盘的一部分，并发现它们与沙漠蝗虫的神经元布局高度相似。斑蝶太阳罗盘网络神经元的细胞内记录揭示了对偏振光的特定e向量角度的响应，以及对非偏振光的方位依赖响应，与光谱组成无关。单个神经元对这两种刺激的神经反应是通过复眼的不同区域介导的。此外，这些双重反应被整合在一起，在太阳罗盘中创造了一个一致的天窗线索。这一结果促进了我们对大脑如何处理模糊的感觉信号以引发强烈行为反应的理解。
Migrating monarch butterflies (Danaus plexippus) use a time-compensated sun compass to navigate from eastern North America to their overwintering grounds in central Mexico. Here we describe the neuronal layout of those aspects of the butterfly's central complex likely to establish part of the internal sun compass and find them highly homologous to those of the desert locust. Intracellular recordings from neurons in the monarch sun compass network reveal responses tuned to specific E-vector angles of polarized light, as well as azimuth-dependent responses to unpolarized light, independent of spectral composition. The neural responses to these two stimuli in individual neurons are mediated through different regions of the compound eye. Moreover, these dual responses are integrated to create a consistent representation of skylight cues in the sun compass throughout the day. The results advance our understanding of how ambiguous sensory signals are processed by the brain to elicit a robust behavioral response.