Odorant response properties of individual neurons in an olfactory glomerular module.

Odorant response properties of individual neurons in an olfactory glomerular module.
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DOI:
10.1016/j.neuron.2013.01.022
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发表时间:
2013-03-20
期刊:
影响因子:
16.2
通讯作者:
Nagayama S
Nagayama S
中科院分区:
医学1区
文献类型:
--
作者:
Kikuta S;Fletcher ML;Homma R;Yamasoba T;Nagayama S

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与嗅球中的肾小球直接相关的神经元网络被认为包括功能模块。然而,这还没有得到实验证明。在这项研究中,我们探讨了在体内双光子钙成像肾小球模块的解剖和功能架构。令人惊讶的是,肾小球模块的深部显示出与其他模块相当大的空间重叠。球旁细胞表现出类似的兴奋性气味反应的配置文件突触前嗅觉感觉神经元的输入。二尖瓣细胞表现出更尖锐的调谐分子的接受范围相比,肾小球细胞,其气味反应的配置文件不同,这取决于它们的神经元间的水平距离。这些数据表明,肾小球模块是由功能不同的神经元,和均匀的气味输入到每个肾小球可能会被解析和处理模块内的不同方式之前,被发送到更高的嗅觉中心。
Neuronal networks that are directly associated with glomeruli in the olfactory bulb are thought to comprise functional modules. However, this has not yet been experimentally proven. In this study, we explored the anatomical and functional architecture of glomerular modules using in vivo two-photon calcium imaging. Surprisingly, the deep portions of the glomerular modules showed considerable spatial overlap with other modules. Juxtaglomerular cells showed similar excitatory odorant response profiles to presynaptic olfactory sensory neuron inputs. Mitral cells exhibited a more sharply tuned molecular receptive range compared to juxtaglomerular cells, and their odorant response profiles varied depending on their interneuronal horizontal distances. These data suggest that glomerular modules are composed of functionally distinct neurons, and that homogenous odor inputs to each glomerulus may be parsed and processed in different fashions within the modules before being sent to higher olfactory centers.
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