Combining stimulus types for improved coverage in population receptive field mapping
| Autor: | Michael Woletz, Christian Windischberger, Ursula Schmidt-Erfurth, Markus Ritter, David Linhardt, Maximilian Pawloff, Martin Tik, Allan Hummer |
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| Rok vydání: | 2021 |
| Předmět: |
Adult
Male Visual stimuli Visual perception Bar (music) Cognitive Neuroscience media_common.quotation_subject Population Neurosciences. Biological psychiatry. Neuropsychiatry Retina 050105 experimental psychology Young Adult 03 medical and health sciences 0302 clinical medicine Foveal Humans Visual Pathways 0501 psychology and cognitive sciences Eccentricity (behavior) education Visual Cortex Mathematics media_common Brain Mapping education.field_of_study business.industry fMRI 05 social sciences Retinotopy Pattern recognition Magnetic Resonance Imaging Visual field Neurology Coverage map Receptive field Female Artificial intelligence Visual Fields pRF mapping business Photic Stimulation 030217 neurology & neurosurgery RC321-571 |
| Zdroj: | NeuroImage, Vol 238, Iss, Pp 118240-(2021) |
| ISSN: | 1053-8119 |
| DOI: | 10.1016/j.neuroimage.2021.118240 |
| Popis: | Retinotopy experiments using population receptive field (pRF) mapping are ideal for assigning regions in the visual field to cortical brain areas. While various designs for visual stimulation were suggested in the literature, all have specific shortcomings regarding visual field coverage. Here we acquired high-resolution 7 Tesla fMRI data to compare pRF-based coverage maps obtained with the two most commonly used stimulus variants: moving bars; rotating wedges and expanding rings. We find that stimulus selection biases the spatial distribution of pRF centres. In addition, eccentricity values and pRF sizes obtained from wedge/ring or bar stimulation runs show systematic differences. Wedge/ring stimulation results show lower eccentricity values and strongly reduced pRF sizes compared to bar stimulation runs. Statistical comparison shows significantly higher pRF centre numbers in the foveal 2° region of the visual field for wedge/ring compared to bar stimuli. We suggest and evaluate approaches for combining pRF data from different visual stimulus patterns to obtain improved mapping results. |
| Databáze: | OpenAIRE |
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