Training-induced changes in population receptive field properties in visual cortex: Impact of eccentric vision training on population receptive field properties and the crowding effect

URN to cite this document:

urn:nbn:de:bvb:355-epub-585541 Copy

DOI to cite this document:

10.5283/epub.58554 Copy

Malania, Maka ; Lin, Yih-Shiuan ; Hörmandinger, Charlotte ; Werner, John S. ; Greenlee, Mark W. ; Plank, Tina

License: Creative Commons Attribution 4.0 PDF - Published Version (1MB)

Date of publication of this fulltext: 01 Jul 2024 09:19

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Details

Item type:	Article
Open Access Type:	Gold (with APC)
Journal or Publication Title:	Journal of Vision
Publisher:	Association for Research in Vision and Ophthalmology (ARVO)
Volume:	24
Number of Issue or Book Chapter:	5
Page Range:	p. 7
Date:	21 May 2024
Institutions:	Human Sciences > Institut für Psychologie > Lehrstuhl für Psychologie I (Allgemeine Psychologie I und Methodenlehre) - Prof. Dr. Mark W. Greenlee
Projects (Historical):	DFG; Project PL 641/1-1 to TP and Project GR 988/27-1 to MWG), Bavaria California Technology Center, DFG, central 3-Tesla MRI facilities (INST 89/393-1 FUGG)
Identification Number:	Value Type 10.1167/jov.24.5.7 DOI
Keywords:	Keywords: pRF, brain plasticity, crowding, perceptual learning, retinotopic mapping, fMRI
Dewey Decimal Classification:	100 Philosophy & psychology > 150 Psychology
Status:	Published
Refereed:	Yes, this version has been refereed
Created at the University of Regensburg:	Yes
Item ID:	58554

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Abstract

This study aimed to investigate the impact of eccentric-vision training on population receptive field (pRF) estimates to provide insights into brain plasticity processes driven by practice. Fifteen participants underwent functional magnetic resonance imaging (fMRI) measurements before and after behavioral training on a visual crowding task, where the relative orientation of the opening (gap ...

Abstract

This study aimed to investigate the impact of eccentric-vision training on population receptive field (pRF) estimates to provide insights into brain plasticity processes driven by practice. Fifteen participants underwent functional magnetic resonance imaging (fMRI) measurements before and after behavioral training on a visual crowding task, where the relative orientation of the opening (gap position: up/down, left/right) in a Landolt C optotype had to be discriminated in the presence of flanking ring stimuli. Drifting checkerboard bar stimuli were used for pRF size estimation in multiple regions of interest (ROIs): dorsal-V1 (dV1), dorsal-V2 (dV2), ventral-V1 (vV1), and ventral-V2 (vV2), including the visual cortex region corresponding to the trained retinal location. pRF estimates in V1 and V2 were obtained along eccentricities from 0.5° to 9°. Statistical analyses revealed a significant decrease of the crowding anisotropy index (p = 0.009) after training, indicating improvement on crowding task performance following training. Notably, pRF sizes at and near the trained location decreased significantly (p = 0.005). Dorsal and ventral V2 exhibited significant pRF size reductions, especially at eccentricities where the training stimuli were presented (p < 0.001). In contrast, no significant changes in pRF estimates were found in either vV1 (p = 0.181) or dV1 (p = 0.055) voxels. These findings suggest that practice on a crowding task can lead to a reduction of pRF sizes in trained visual cortex, particularly in V2, highlighting the plasticity and adaptability of the adult visual system induced by prolonged training.

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Metadata last modified: 21 Jan 2025 07:18

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