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首页> 外文期刊>Progress in brain research >Retinogeniculate connections: A balancing act between connection specificity and receptive field diversity.
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Retinogeniculate connections: A balancing act between connection specificity and receptive field diversity.

机译：维网连接：连接特异性和感受野多样性之间的平衡行为。

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Retinogeniculate connections are one of the most striking examples of connection specificity within the visual pathway. In almost every connection there is one dominant afferent cell per geniculate cell, and both afferent and geniculate cells have very similar receptive fields. The remarkable specificity and strength of retinogeniculate connections have inspired comparisons of the lateral geniculate nucleus (LGN) with a simple relay that connects the retina with the visual cortex. However, because each retinal ganglion cell diverges to innervate multiple cells in the LGN, most geniculate cells must receive additional inputs from other retinal afferents that are not the dominant ones. These additional afferents make weaker connections and their receptive fields are not as perfectly matched with the geniculate target as the dominant afferent. We argue that these 'match imperfections' are important to create receptive field diversity among the cells that represent each point of visual space in the LGN. Wepropose that the convergence of dominant and weak retinal afferents in the LGN multiplexes the array of retinal ganglion cells by creating receptive fields that have a richer range of positions, sizes and response time courses than those available at the ganglion cell layer of the retina.
机译：维甲酸连接是视觉通路内连接特异性最明显的例子之一。在几乎每个连接中，每个膝状细胞都有一个显性传入细胞，传入和膝状细胞都具有非常相似的感受野。视黄醛生成连接的卓越的特异性和强度激发了通过将视网膜与视觉皮层相连的简单中继器对外侧膝状生成核（LGN）的比较。但是，由于每个视网膜神经节细胞发散，以支配LGN中的多个细胞，因此大多数膝状细胞必须从不是主要的其他视网膜传入细胞接收其他输入。这些额外的传入连接之间的连接较弱，并且它们的感受野与显性目标的匹配范围不如优势传入匹配。我们认为，这些“匹配缺陷”对于在代表LGN视觉空间每个点的细胞之间创建感受野多样性很重要。我们提出LGN中优势和弱势视网膜传入神经的融合通过形成比位置域的神经节细胞层更丰富的位置，大小和响应时间过程的感受野来复用视网膜神经节细胞阵列。

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