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Cortical idiosyncrasies predict the perception of object size

机译:皮质特质预测对象尺寸的感知

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摘要

Perception is subjective. Even basic judgments, like those of visual object size, vary substantially between observers and also across the visual field within the same observer. The way in which the visual system determines the size of objects remains unclear, however. We hypothesize that object size is inferred from neuronal population activity in V1 and predict that idiosyncrasies in cortical functional architecture should therefore explain individual differences in size judgments. Here we show results from novel behavioural methods and functional magnetic resonance imaging (fMRI) demonstrating that biases in size perception are correlated with the spatial tuning of neuronal populations in healthy volunteers. To explain this relationship, we formulate a population read-out model that directly links the spatial distribution of V1 representations to our perceptual experience of visual size. Taken together, our results suggest that the individual perception of simple stimuli is warped by idiosyncrasies in visual cortical organization.
机译:感知是主观的。即使是基本的判断,如视觉对象大小的判断,在观察者之间以及同一观察者的整个视野​​中也会有很大不同。但是,视觉系统确定对象大小的方式仍然不清楚。我们假设对象大小是从V1中的神经元种群活动推断得出的,并预测皮质功能结构中的特质应解释大小判断中的个体差异。在这里,我们显示了来自新的行为方法和功能磁共振成像(fMRI)的结果,这些结果表明,尺寸感知上的偏差与健康志愿者中神经元群体的空间调节有关。为了解释这种关系,我们制定了人口读出模型,该模型将V1表示的空间分布直接与视觉大小的感知体验联系起来。综上所述,我们的结果表明,视觉皮层组织的特质使个人对简单刺激的感知发生扭曲。

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