Müller cell alignment in bird fovea: possible role in vision.
Müller cell alignment in bird fovea: possible role in vision.
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鸟类中央凹中的穆勒细胞排列：在视觉中的可能作用。
DOI：
10.1166/jnsne.2014.1104
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发表时间：
2014
期刊：
影响因子：
--
通讯作者：
Inyushin,Mikhail
中科院分区：
文献类型：
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作者：
Zueva,Lidia;Makarov,Vladimir;Zayas-Santiago,Astrid;Golubeva,Tatiana;Korneeva,Elena;Savvinov,Alexey;Eaton,Misty;Skatchkov,Serguei;Inyushin,Mikhail
拥有高视力的鸟类，如鹰和猎鹰，他们的视网膜有一个深的圆锥形的中央凹。有不同的尝试来解释这种特殊形状的中央窝在视觉分辨率中的重要性。最近，科学家发现了m<s:1> ller细胞作为“光纤维”的功能，显示了m<s:1> ller细胞的端足如何捕获光，然后将其转移到单个锥状光感受器上。在这里，我们描述了m<s:1> ller细胞的端足是如何排列在斑蝇的中央凹穴壁上的，以及m<s:1> ller细胞体是如何向单个锥体延伸的，形成了一种机制，可以允许光从凹壁转移到凹边的光感受器层。我们描述了这种结构如何将图像从中央凹发送到锥体，并且，作为锥体的光学延伸，m<s:1> ller细胞的角度定位如何具有比平坦或略微弯曲的中央凹密度大得多的优势。因此，我们建议这种类型的光纤排列可以用作一种新型的“放大阵列”，只需增加感光细胞层的百万像素数量。
Birds which possess high visual acuity, such as eagles and falcons, are known to have retinas with a deep conically curved central foveal pit. There have been different attempts to explain the importance of this particular shape of the fovea in visual resolution. Recently, the function of Müller cells as “light fibers” was discovered, showing how the endfeet of Müller cells trap the light and then transfer it to a single cone photoreceptor. Here we describe how the endfeet of Müller cells line the walls of the foveal pit in the Pied Flycatcher, and how the Müller cell body extends its processes towards individual cones, forming machinery that could allow for light transfer from the pit wall to the photoreceptor layer alongside the pit. We describe how this construction may send an image from the fovea to the cones, and also, how the angular positioning of Müller cells, being optical extensions of the cones, has the advantage of being much denser than on a flat or slightly curved fovea. We, therefore, suggest that this type of optic fiber alignment can be used as a novel type of “amplifying array” that simply increases the amount of megapixels at the photoreceptor cell layer.