| Grant number: | 20/09284-5 |
| Support Opportunities: | Scholarships in Brazil - Doctorate |
| Start date: | May 01, 2021 |
| End date: | September 30, 2024 |
| Field of knowledge: | Interdisciplinary Subjects |
| Principal Investigator: | Gustavo Rohenkohl |
| Grantee: | Gabriela Mueller de Melo |
| Host Institution: | Instituto de Biociências (IB). Universidade de São Paulo (USP). São Paulo , SP, Brazil |
| Associated research grant: | 17/10429-5 - Long-range brain connectivity during active visual behavior, AP.JP |
| Associated scholarship(s): | 23/03177-0 - Evidence integration in the human brain through active visual sampling, BE.EP.DR |
Abstract Through saccadic eye movements, points of interest are brought to the center of the visual field for high-resolution processing in the fovea. Despite rapid changes in sensory input to the retina across saccades, we nevertheless see the world as perceptually stable. Given the short timescales of saccades, several processes that ensure visual consistency across eye movements take place during preparation of saccades. These mechanisms generally involve the anticipatory processing of information about target features while they are not yet onto the fovea, but still in the periphery of the visual field. The specific engagement of the fovea in these pressacadic processes, however, has not been directly explored to date. Thus, in this project, we propose the development of empirical studies to investigate the possible role of the fovea in generating and processing predictive information about saccade targets. First, in a psychophysical study in humans, we plan to investigate the behavioral effects of probing the fovea during saccade planning to a matching versus non-matching target. Second, we designed an electroencephalogram study to investigate the neural signals associated with foveal processing of visual features of upcoming saccade targets in humans. Lastly, an electrophysiological study in single neurons of non-human primates is planned to evaluate presaccadic responses associated with foveal and peripheral visual processing. The development of this project will contribute to elucidating the mechanisms responsible for providing anticipatory information to the visual system about its upcoming fixation points, ultimately contributing to our perception of a cohesive visual world. (AU) | |
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