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Electrical stimulation alters light responses of mouse retinal ganglion cells

机译:电气刺激改变小鼠视网膜神经节细胞的光反应

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Despite considerable advances in the field of retinal prosthetics during recent years, significant variability remains in the quality of vision restoration for patients. One target for refinement of prosthetic vision is to selectively activate one or more of the ~20 parallel channels of visual information that are established in the retina and subsequently travel to different visual networks in the brain. These different channels result in different spike train response patterns in the retinal ganglion cells (RGCs) which constitute the sole output neuron population of the retina. Here we demonstrate, however, that the genuine visual response patterns of retinal ganglion cells can be altered by electrical stimulation, suggesting that the encoding of visual stimuli by retinal prosthesis devices may require consideration of stimulation-induced changes in the retina. Specifically, we demonstrate that ON and OFF response amplitudes increase significantly after stimulation. This leads to changes in the relative weighting of ON and OFF response types on a cell by cell basis - fundamentally altering the visual stimulus encoded by some RGCs.
机译:尽管近年来在视网膜假肢领域相当大的进展,显著的变化仍然是视力恢复质量为病人。对于假体视力的细化一个目标是选择性地激活一个或多个建立在脑视网膜并随后行进到不同的视觉网络的视觉信息的〜20个并行通道。这些不同的信道导致在视网膜神经节细胞(RGC)构成视网膜的唯一输出神经元群体不同穗列车的反应模式。在这里,我们证明,然而,视网膜神经节细胞的真正视觉响应模式可以通过电刺激来改变,这表明视觉刺激的视网膜假体装置的编码可能需要考虑的在视网膜刺激诱导的变化。具体而言,我们表明,在ON和OFF反应振幅刺激后显著增加。这导致在接通和断开响应类型对通过细胞基础小区中的相对权重的变化 - 从根本上改变由一些视网膜神经节细胞编码的视觉刺激。

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