| Autor: |
Chang K; Department of Psychology, University of Washington Seattle, Washington., Fine I; Department of Psychology, University of Washington Seattle, Washington., Boynton GM; Department of Psychology, University of Washington Seattle, Washington. |
| Jazyk: |
angličtina |
| Zdroj: |
BioRxiv : the preprint server for biology [bioRxiv] 2024 Jun 13. Date of Electronic Publication: 2024 Jun 13. |
| DOI: |
10.1101/2024.06.11.598529 |
| Abstrakt: |
The population receptive field method, which measures the region in visual space that elicits a BOLD signal in a voxel in retinotopic cortex, is a powerful tool for investigating the functional organization of human visual cortex with fMRI (Dumoulin & Wandell, 2008). However, recent work has shown that population receptive field (pRF) estimates for early retinotopic visual areas can be biased and unreliable, especially for voxels representing the fovea. Here, we show that a 'log-bar' stimulus that is logarithmically warped along the eccentricity dimension produces more reliable estimates of pRF size and location than the traditional moving bar stimulus. The log-bar stimulus was better able to identify pRFs near the foveal representation, and pRFs were smaller in size, consistent with simulation estimates of receptive field sizes in the fovea. |
| Databáze: |
MEDLINE |
| Externí odkaz: |
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