In this study, we aim to examine the role of the FEF in pursuit. Specifically, we will contrast its influence on the gain of (memory-driven) anticipatory versus (visually-driven) steady-state pursuit. To do so, par-ticipants will be tasked to track a target motion with high movement predictability (timing, speed, direction). To evoke changes in pursuit behavior, we will utilize the relatively new technique of high-definition transcranial direct current stimulation (hd-tDCS). The task presented consists of two functional parts: First, target blanking before the onset of movement allows to calculate anticipatory pursuit in the absence of visual feedback. Second, perturbations of the target otherwise moving with a constant velocity evoke eye movement reactions during steady-state pursuit whose magnitudes depends on the current visuo-to-motor gain without the influence of prediction.
GitHub repository for Matlab code used in task presentation and analysis: https://github.com/BlohmLab/AnticipatoryPursuit
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