Abstract #3207
Laminar variation of population receptive field center-surround properties in human primary visual cortex revealed by 7T fMRI
Alessio Fracasso 1 , Serge O Dumoulin 1 , and Natalia Petridou 2
1
Experimental Psychology, Helmholtz
institute, Utrecht University, Utrecht, Netherlands,
2
Radiology,
Imaging Division, University Medical Center, Utrecht,
Netherlands
Receptive field (RF) properties change across visual
hierarchy. A similar hierarchy exists across cortical
lamina in primary visual cortex (V1) but little is known
about its organization. We acquired functional T2*-w
3-dimensional EPI (3D-EPI) at 7T. We performed lamina
segmentation on 3D-EPI space. A forward modeling
approach (population receptive field, pRF) was adopted
to estimate pRF properties across lamina, in humans. pRF
center and surround varies according to a U-shaped
function across cortical thickness with a constant
balance. These results extend the variation of pRF
properties across visual field maps hierarchy to a
laminar hierarchy within a single map.
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