Skip to main content

Research Repository

Advanced Search

Two-Dimensional Population Receptive Field Mapping of Human Primary Somatosensory Cortex

Asghar, Michael; Sanchez-Panchuelo, Rosa; Schluppeck, Denis; Francis, Susan

Authors

Rosa Sanchez-Panchuelo



Abstract

Functional magnetic resonance imaging can provide detailed maps of how sensory space is mapped in the human brain. Here, we use a novel 16 stimulator setup (a 4 × 4 grid) to measure two-dimensional sensory maps of between and within-digit (D2–D4) space using high spatial-resolution (1.25 mm isotropic) imaging at 7 Tesla together with population receptive field (pRF) mapping in 10 participants. Using a 2D Gaussian pRF model, we capture maps of the coverage of digits D2–D5 across Brodmann areas and estimate pRF size and shape. In addition, we compare results to previous studies that used fewer stimulators by constraining pRF models to a 1D Gaussian Between Digit or 1D Gaussian Within Digit model. We show that pRFs across somatosensory areas tend to have a strong preference to cover the within-digit axis. We show an increase in pRF size moving from D2–D5. We quantify pRF shapes in Brodmann area (BA) 3b, 3a, 1, 2 and show differences in pRF size in Brodmann areas 3a-2, with larger estimates for BA2. Generally, the 2D Gaussian pRF model better represents pRF coverage maps generated by our data, which itself is produced from a 2D stimulation grid.

Citation

Asghar, M., Sanchez-Panchuelo, R., Schluppeck, D., & Francis, S. (2023). Two-Dimensional Population Receptive Field Mapping of Human Primary Somatosensory Cortex. Brain Topography, 36, 816-834. https://doi.org/10.1007/s10548-023-01000-8

Journal Article Type Article
Acceptance Date Aug 9, 2023
Online Publication Date Aug 27, 2023
Publication Date 2023-11
Deposit Date Aug 15, 2023
Publicly Available Date Aug 28, 2024
Journal Brain Topography
Print ISSN 0896-0267
Electronic ISSN 1573-6792
Publisher Springer Verlag
Peer Reviewed Peer Reviewed
Volume 36
Pages 816-834
DOI https://doi.org/10.1007/s10548-023-01000-8
Keywords Population receptive fields; 7T fMRI; Primary somatosensory cortex; Primary motor cortex; Somatotopy
Public URL https://nottingham-repository.worktribe.com/output/24399338
Publisher URL https://link.springer.com/article/10.1007/s10548-023-01000-8

Files





You might also like



Downloadable Citations