Effect of Eye-movements on Space Perception
When we look at a scene we feel we perceive the visual world in all its detail and richness. What leads us to the experience of visual space and how do we integrate perception across eye movements? Even prior to saccade onset, studies using briefly flashed stimuli, revealed changes in perception such as a compression of the visual space. However, neither the neural mechanisms responsible for 'compression', nor its role in perception have been revealed. We have developed a neurocomputational model to further guide research in this area.
The model consists of two layers. Layer 1 encodes the presented stimulus position as an active population in a cortical coordinate system considering RF size and magnification. This population gets distorted by a oculomotor or attentive feedback signal. The pooled distorted population is represented in Layer 2 and used to determine the perceived position.