Adaptive coding across visual features during free-viewing and fixation conditions.
Adaptive coding across visual features during free-viewing and fixation conditions.
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DOI：
10.1038/s41467-022-35656-w
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发表时间：
2023-01-06
影响因子：
16.6
通讯作者：
Dragoi, Valentin
中科院分区：
文献类型：
--
作者：
Nigam, Sunny;Milton, Russell;Pojoga, Sorin;Dragoi, Valentin
长期以来，理论研究一直认为，适应可以让大脑有效地利用感觉神经元有限的反应范围来编码各种各样的自然输入。然而，尽管有这种有影响力的观点，实验研究只关注神经代码如何适应沿着单一特征轴的一系列刺激，如方向或对比度。在这里，我们在猕猴视觉皮层（V4区）进行了电记录，以揭示单个细胞和群体的神经代码在多个特征轴上的显着适应性变化。无论是在自由观看和被动固定，群体的细胞提高了他们的能力，编码图像特征后，快速暴露于刺激躺在正交特征轴，即使在没有初始调谐到这些刺激。这些结果揭示了一个显着的自适应能力的视觉皮层人群，以提高网络计算相关的自然观看，尽管模块化的功能皮层架构。视觉系统如何适应刺激沿着多个特征轴在自然观看知之甚少。在这里，作者表明，在快速暴露于正交特征后，视觉皮质中图像特征的刺激编码显着增强。
Theoretical studies have long proposed that adaptation allows the brain to effectively use the limited response range of sensory neurons to encode widely varying natural inputs. However, despite this influential view, experimental studies have exclusively focused on how the neural code adapts to a range of stimuli lying along a single feature axis, such as orientation or contrast. Here, we performed electrical recordings in macaque visual cortex (area V4) to reveal significant adaptive changes in the neural code of single cells and populations across multiple feature axes. Both during free viewing and passive fixation, populations of cells improved their ability to encode image features after rapid exposure to stimuli lying on orthogonal feature axes even in the absence of initial tuning to these stimuli. These results reveal a remarkable adaptive capacity of visual cortical populations to improve network computations relevant for natural viewing despite the modularity of the functional cortical architecture. How the visual system adapts to stimuli along multiple feature axes during natural viewing is poorly understood. Here, the authors show significant enhancement of stimulus coding of image features in visual cortex after rapid exposure to an orthogonal feature.
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