Dynamic Stimulation of Visual Cortex Produces Form Vision in Sighted and Blind Humans.,Cell

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Dynamic Stimulation of Visual Cortex Produces Form Vision in Sighted and Blind Humans.
Cell ( IF 45.5 ) Pub Date : 2020-05-14 , DOI: 10.1016/j.cell.2020.04.033
Michael S Beauchamp ₁ , Denise Oswalt ₁ , Ping Sun ₁ , Brett L Foster ₁ , John F Magnotti ₁ , Soroush Niketeghad ₂ , Nader Pouratian ₃ , William H Bosking ₁ , Daniel Yoshor ₁

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A visual cortical prosthesis (VCP) has long been proposed as a strategy for restoring useful vision to the blind, under the assumption that visual percepts of small spots of light produced with electrical stimulation of visual cortex (phosphenes) will combine into coherent percepts of visual forms, like pixels on a video screen. We tested an alternative strategy in which shapes were traced on the surface of visual cortex by stimulating electrodes in dynamic sequence. In both sighted and blind participants, dynamic stimulation enabled accurate recognition of letter shapes predicted by the brain's spatial map of the visual world. Forms were presented and recognized rapidly by blind participants, up to 86 forms per minute. These findings demonstrate that a brain prosthetic can produce coherent percepts of visual forms.

中文翻译：

视觉皮层的动态刺激在视力和盲人中产生形式视觉。

长期以来，人们一直提出视觉皮层假体（VCP）作为恢复盲人有用视力的策略，其前提是假定通过视觉皮层（磷）的电刺激产生的小光斑的视觉感知将合并为视觉的连贯感知形式，例如视频屏幕上的像素。我们测试了一种替代策略，其中通过以动态顺序刺激电极来在视觉皮层表面上追踪形状。在有眼和盲人中，动态刺激都可以准确识别由视觉世界的大脑空间图预测的字母形状。盲人可以快速提交和识别表格，每分钟最多可以填写86表格。这些发现表明，假肢可以产生视觉形式的连贯感知。

更新日期：2020-05-14

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