General Psychology Department, University of Padova, Padova, Italy.
Cogn Neuropsychol. 2022 Feb;39(1-2):103-105. doi: 10.1080/02643294.2022.2083948. Epub 2022 Jun 16.
I further develop the Vannuscorps et al. [(2021). Shape-centered representations of bounded regions of space mediate the perception of objects. 1-50.] interpretation of Davida's deficit, as based on a failure of mapping information carried by the parvocellular pathway onto non-retinotopic coordinates. I assumed that magno-parvo cooperation is required to bind local features into 2-D shapes with sharp edges, although the relative role of either subsystem may depend on the task. My suggestion is that perception is un impaired when the imbalance is in favour of the magno system; that is, with images blurred or made up of either disconnected elements or isolated line segments not requiring binding. Conversely, misperception occurs when the task involves an imbalance in favour of parvo analysis; i.e., when orientation judgment is based mainly on the highest levels of parvo analysis devoted to binding in the ventral stream. In these last conditions, Davida's misperception of orientation of these 2-D shapes may result from a switch of magno-parvo cooperation to conflict.
我进一步发展了 Vannuscorps 等人的解释（2021 年），即基于对小细胞通路携带的信息未能映射到非视网膜坐标上的假设，空间有界区域的以形状为中心的表示介导了对物体的感知。我假设，虽然两个子系统的相对作用可能取决于任务，但巨-小细胞的合作是将局部特征绑定到具有锐利边缘的 2D 形状所必需的。我的建议是，当不平衡有利于巨细胞系统时，感知不受影响；也就是说，当图像模糊或由不连续的元素或不需要绑定的孤立线段组成时，感知不受影响。相反，当任务涉及有利于小细胞分析的不平衡时，就会出现错觉；也就是说，当基于专门用于腹侧流中绑定的小细胞分析的最高级别来进行方向判断时。在这些最后一种情况下，Davida 对这些 2D 形状的方向的错觉可能是由于巨-小细胞合作向冲突的转变。
