Perceptual priors add sensory detail to contextual feedback processing in V1
Perceptual priors add sensory detail to contextual feedback processing in V1
复制标题
感知先验为 V1 中的上下文反馈处理添加了感官细节
DOI：
10.1101/2023.09.23.559098
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发表时间：
2023
期刊：
影响因子：
--
通讯作者：
Lazarova Y
中科院分区：
文献类型：
--
作者：
Lazarova Y
我们如何建立世界模型？将模糊的信息与以前的经验联系起来，可以让我们形成丰富的感知。上下文信息和先验知识促进感知处理，提高我们对甚至扭曲或受阻的视觉输入的识别。因此，由相同的感觉输入引起的神经元处理取决于我们遇到这些输入的上下文。这种调制与视觉的预测处理帐户相一致，这表明大脑使用世界的内部模型来预测感官输入，感觉区域中的皮层反馈处理对这些输入的信念进行编码。因此，获取知识应该增强我们用来解决感官模糊性的内部模型，反馈信号应该对感官输入进行更准确的估计。我们使用了部分闭塞的门尼图像，模糊的双色调图像，这是很难识别的图像内容的先验知识，在行为和3T功能磁共振成像实验中，以测量是否在早期视觉区域的上下文反馈信号调制的学习。我们发现，知觉先验增加感官细节的上下文反馈处理在早期视觉领域，在随后的介绍以前模糊的图像。
How do we develop models of the world? Contextualising ambiguous information with previous experience allows us to form an enriched perception. Contextual information and prior knowledge facilitate perceptual processing, improving our recognition of even distorted or obstructed visual inputs. As a result, neuronal processing elicited by identical sensory inputs varies depending on the context in which we encounter those inputs. This modulation is in line with predictive processing accounts of vision which suggest that the brain uses internal models of the world to predict sensory inputs, with cortical feedback processing in sensory areas encoding beliefs about those inputs. As such, acquiring knowledge should enhance our internal models that we use to resolve sensory ambiguities, and feedback signals should encode more accurate estimates of sensory inputs. We used partially occluded Mooney images, ambiguous two-tone images which are difficult to recognise without prior knowledge of the image content, in behavioural and 3T fMRI experiments to measure if contextual feedback signals in early visual areas are modulated by learning. We show that perceptual priors add sensory detail to contextual feedback processing in early visual areas in response to subsequent presentations of previously ambiguous images.
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