Agaoglu Mehmet N, Herzog Michael H, Öğmen Haluk
Department of Electrical and Computer Engineering, University of Houston, N308 Engineering Building 1, Houston, TX 77204-4005, USA; Center for Neuro-Engineering and Cognitive Science, University of Houston, Houston, TX 77204-4005, USA.
Laboratory of Psychophysics, Brain Mind Institute, Ecole Polytechnique Fédérale de Lausanne (EPFL), Lausanne, Switzerland.
Vision Res. 2015 Feb;107:101-12. doi: 10.1016/j.visres.2014.12.009. Epub 2014 Dec 20.
The retinotopic projection of stimulus motion depends both on the motion of the stimulus and the movements of the observer. In this study, we aimed to quantify the contributions of endogenous (retinotopic) and exogenous (spatiotopic and motion-based) reference frames on judgments of motion direction. We used a variant of the induced motion paradigm and we created different experimental conditions in which the predictions of each reference frame were different. Finally, assuming additive contributions from different reference frames, we used a linear model to account for the data. Our results suggest that the effective reference frame for motion perception emerges from an amalgamation of motion-based, retinotopic and spatiotopic reference frames. In determining the percept, the influence of relative motion, defined by a motion-based reference frame, dominates those of retinotopic and spatiotopic motions within a finite region. We interpret these findings within the context of the Reference Frame Metric Field (RFMF) theory, which states that local motion vectors might have perceptual reference-frame fields associated with them, and interactions between these fields determine the selection of the effective reference frame.
刺激运动的视网膜拓扑投射既取决于刺激的运动,也取决于观察者的运动。在本研究中,我们旨在量化内源性(视网膜拓扑)和外源性(空间拓扑和基于运动的)参考框架对运动方向判断的贡献。我们使用了诱导运动范式的一个变体,并创建了不同的实验条件,其中每个参考框架的预测都不同。最后,假设不同参考框架的贡献是相加的,我们使用线性模型来解释数据。我们的结果表明,运动感知的有效参考框架来自基于运动的、视网膜拓扑的和空间拓扑的参考框架的融合。在确定感知时,由基于运动的参考框架定义的相对运动的影响在有限区域内主导视网膜拓扑运动和空间拓扑运动的影响。我们在参考框架度量场(RFMF)理论的背景下解释这些发现,该理论指出局部运动向量可能有与之相关的感知参考框架场,并且这些场之间的相互作用决定了有效参考框架的选择。