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首页> 外文期刊>Current Biology: CB >Synaptic Transfer between Rod and Cone Pathways Mediated by AII Amacrine Cells in the Mouse Retina
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Synaptic Transfer between Rod and Cone Pathways Mediated by AII Amacrine Cells in the Mouse Retina

机译:由小鼠视网膜中AII胺溴细胞介导的杆和锥形途径之间的突触转移

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To understand computation in a neural circuit requires a complete synaptic connectivity map and a thorough grasp of the information-processing tasks performed by the circuit. Here, we dissect a microcircuit in the mouse retina in which scotopic visual information (i.e., single photon events, luminance, contrast) is encoded by rod bipolar cells (RBCs) and distributed to parallel ON and OFF cone bipolar cell (CBC) circuits via the AII amacrine cell, an inhibitory interneuron. Serial block-face electron microscopy (SBEM) reconstructions indicate that AIIs preferentially connect to one OFF CBC subtype (CBC2); paired whole-cell patch-clamp recordings demonstrate that, depending on the level of network activation, AIIs transmit distinct components of synaptic input from single RBCs to downstream ON and OFF CBCs. These findings highlight specific synaptic and circuit-level features that allow intermediate neurons (e.g., AIIs) within a microcircuit to filter and propagate information to downstream neurons.
机译:为了理解神经电路中的计算需要完整的突触连接图,并彻底掌握电路执行的信息处理任务。在这里,我们将微电路分析在小鼠视网膜中,其中通过杆双极电池(RBCS)编码突出的视觉信息(即单个光子事件,亮度,对比度)并通过杆双极电池(CBC)电路通过AII胺氨基细胞,抑制性的中间核。连续块面电子显微镜(SBEM)重建表明AIIS优先连接到一个OFF CBC亚型(CBC2);配对的全单元贴片夹具记录表明,根据网络激活的水平,AIIS将单个RBCS的突触输入的不同组件传输到下游和关闭CBC。这些发现突出了允许微电路内的中间神经元(例如,AIIS)过滤和传播到下游神经元的中间神经元(例如,AIIS)。

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