Cortical idiosyncrasies predict the perception of object size.
Cortical idiosyncrasies predict the perception of object size.
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DOI：
10.1038/ncomms12110
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发表时间：
2016-06-30
影响因子：
16.6
通讯作者：
Schwarzkopf DS
中科院分区：
文献类型：
--
作者：
Moutsiana C;de Haas B;Papageorgiou A;van Dijk JA;Balraj A;Greenwood JA;Schwarzkopf DS
感知是主观的。即使是基本的判断，如视觉物体大小的判断，在观察者之间也有很大的差异，在同一观察者的视野中也有很大的差异。然而，视觉系统决定物体大小的方式仍然不清楚。我们假设，对象的大小是推断从神经元的群体活动在V1和预测的特质，因此，在皮层功能架构应解释个体差异的大小判断。在这里，我们展示了新的行为方法和功能性磁共振成像（fMRI）的结果表明，在健康志愿者的神经元群体的空间调谐的大小感知的偏见相关。为了解释这种关系，我们制定了一个人口读出模型，直接联系的空间分布的V1表示，我们的感知经验的视觉大小。两者合计，我们的研究结果表明，简单的刺激的个人知觉是扭曲的特质在视觉皮层组织。 感知物体的大小是主观的。在这里，作者表明，这些主观差异的大小知觉可以解释的个体差异的空间调谐的神经元群体在初级视觉皮层。
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. Perceiving the size of objects is subjective. Here the authors show that these subjective differences in size perception can be explained by the individual variance in spatial tuning of neuronal populations in the primary visual cortex.