Toward the development of a color visual prosthesis.
Toward the development of a color visual prosthesis.
复制标题
致力于开发彩色视觉假体。
DOI：
10.1088/1741-2552/abd520
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发表时间：
2021
影响因子：
4
通讯作者：
Troyk,PhilipR
中科院分区：
文献类型：
--
作者：
Towle,VernonL;Pham,Tuan;McCaffrey,Michael;Allen,Danielle;Troyk,PhilipR
目的到目前为止，所有植入的人工视觉系统都是消色差的。Schmidt等人(1996 Brain 119 507-22)报告说，在低刺激强度下，他们的对象报告称，膦通常具有特定的色调，但当刺激强度增加时，它们会去饱和为白色。我们在这里推测，以前的B/W假体系统不必要地过度刺激视觉皮质以获得白色磷烯，这可能是为什么磷烯和癫痫的意外变化并不少见的原因。彩色假体的优点是由较低水平的刺激引起的，降低了引起癫痫反应的可能性。提出了一种混合刺激模式，包括B/W和颜色刺激的组合，该模式可以在不降低空间分辨率的情况下提供颜色信息。主要结果真实世界中的颜色是沿着强度和色度梯度分布的。意义讨论了软件实现策略，以及可能的颜色假体系统的优势和挑战。
ObjectiveAll of the human prosthetic visual systems implanted so far have been achromatic. Schmidt et al (1996 Brain 119 507–22) reported that at low stimulation intensities their subject reported that phosphenes usually had a specific hue, but when the stimulus intensity was increased, they desaturated to white. We speculate here that previous B/W prosthetic systems were unnecessarily over-stimulating the visual cortex to obtain white phosphenes, which may be why unexpected alterations in phosphenes and seizures were not an uncommon occurrence. A color prosthesis would have the advantage of being elicited by lower levels of stimulation, reducing the probability of causing epileptogenic responses.ApproachA'hybrid'mode of stimulation is suggested, involving a combination of B/W and color stimulation, which could provide color information without reducing spatial resolution.Main resultsColors in the real world are spread along intensity and chromatic gradients.SignificanceSoftware implementation strategies are discussed, as are the advantages and challenges for possible color prosthetic systems.