Network anatomy and in vivo physiology of visual cortical neurons.

Network anatomy and in vivo physiology of visual cortical neurons.
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DOI:
10.1038/nature09802
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发表时间:
2011-03-10
期刊:
影响因子:
64.8
通讯作者:
Reid, R. Clay
Reid, R. Clay
中科院分区:
综合性期刊1区
文献类型:
--
作者:
Bock, Davi D.;Lee, Wei-Chung Allen;Kerlin, Aaron M.;Andermann, Mark L.;Hood, Greg;Wetzel, Arthur W.;Yurgenson, Sergey;Soucy, Edward R.;Kim, Hyon Suk;Reid, R. Clay

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在大脑皮层中,局部回路由数万个神经元组成,每个神经元都有数千个突触连接。也许理解这些网络的最大障碍是我们没有它们相互连接的线路图。然而,即使我们有部分或完整的接线图,理解网络也需要每个神经元功能的信息。在这里,我们表明,结构和功能之间的关系,可以研究在大脑皮层与在体生理学和网络解剖学相结合。我们使用双光子钙成像来表征小鼠初级视觉皮层中一组神经元的功能特性-首选刺激方向。然后,我们使用连续薄切片的大规模电子显微镜(EM)来追踪这些神经元局部网络的一部分。与最近的生理实验的预测一致,抑制性中间神经元从附近的兴奋性神经元接收会聚的解剖输入,具有广泛的偏好方向,尽管弱偏差不能被拒绝。
In the cerebral cortex, local circuits consist of tens of thousands of neurons, each of which makes thousands of synaptic connections. Perhaps the biggest impediment to understanding these networks is that we have no wiring diagrams of their interconnections. Even if we had a partial or complete wiring diagram, however, understanding the network would also require information about each neuron's function. Here we show that the relationship between structure and function can be studied in the cortex with a combination of in vivo physiology and network anatomy. We used two-photon calcium imaging to characterize a functional property—the preferred stimulus orientation—of a group of neurons in the mouse primary visual cortex. We then used large-scale electron microscopy (EM) of serial thin sections to trace a portion of these neurons’ local network. Consistent with a prediction from recent physiological experiments, inhibitory interneurons received convergent anatomical input from nearby excitatory neurons with a broad range of preferred orientations, although weak biases could not be rejected.
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