Eye movement dynamics are a key factor for intra-saccadic motion perception

The objectives of this study were to investigate, using multimodal neuroimaging techniques, the involvement of an extended network of visual (V1, V2, V3, hV4 and MT/V5) and oculomotor regions (IPS and FEF) in intra-saccadic motion perception, and how the activity within these regions varies with retinal temporal frequency. It confirms the fundamental involvement of the magnocellular pathway and the mediating role of retinal temporal frequency in intra-saccadic motion perception. Perceptual efficacy is maximized within a specific temporal frequency bandwidth aligned with the tuning properties of magnocellular motion detectors. These perceptual phenomena are tightly coupled with individual oculomotor kinematics, such as saccade peak velocity and post-saccadic oscillations, demonstrating that eye movement dynamics are integral modulators of intra-saccadic visual processing.