Integration of the olfactory code across dendritic claws of single mushroom body neurons.

Integration of the olfactory code across dendritic claws of single mushroom body neurons.
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DOI:
10.1038/nn.3547
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发表时间:
2013-12
影响因子:
25
通讯作者:
Turner, Glenn C.
Turner, Glenn C.
中科院分区:
医学1区
文献类型:
--
作者:
Gruntman, Eyal;Turner, Glenn C.

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在嗅觉系统中,感觉输入被安排在不同的肾小球通道中,这些通道对气味的各种化学特征做出组合集合的反应。在这里,我们研究在哪里以及如何在大脑中更深处读出这种组合代码。我们利用蘑菇体(MB)中神经元的独特形态,这些神经元在大型树突状爪上接收输入。这些树突状爪成像气味反应表明,具有不同气味调谐的输入通道收敛于单个MB神经元。我们确定了这些输入如何相互作用,以驱动细胞尖峰阈值使用细胞内记录检查MB响应光遗传学控制的输入。我们的研究结果为MB神经元的特征选择性提供了一个优雅的解释:这些细胞接收不同类型的输入,并需要这些输入相互作用才能产生尖峰。这些结果建立MB作为一个重要的网站集成在苍蝇嗅觉系统。
In the olfactory system, sensory inputs are arranged in different glomerular channels, which respond in combinatorial ensembles to the various chemical features of an odor. Here we investigate where and how this combinatorial code is read out deeper in the brain. We exploit the unique morphology of neurons in the mushroom body (MB), which receive input on large dendritic claws. Imaging odor responses of these dendritic claws shows that input channels with distinct odor tuning converge on individual MB neurons. We determined how these inputs interact to drive the cell to spike threshold using intracellular recordings to examine MB responses to optogenetically controlled input. Our results provide an elegant explanation for the characteristic selectivity of MB neurons: these cells receive different types of input, and require those inputs to be coactive in order to spike. These results establish the MB as an important site of integration in the fly olfactory system.
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