ArticleCerebral cortex (New York, N.Y. : 1991)2025
Cortical response to transient and long-term visual field loss.
Article in Cerebral cortex (New York, N.Y. : 1991), 2025. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Not yet cited in PubMed.
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Abstract
In the visual cortices, receptive fields (RFs) are arranged in a gradient from small sizes in the center of the visual field to the largest sizes at the periphery. Using functional magnetic resonance imaging (fMRI) mapping of population RFs, we investigated RF adaptation in V1, V2, and V3 in patients after long-term photoreceptor degeneration affecting the central (Stargardt disease [STGD]) and peripheral (Retinitis Pigmentosa [RP]) regions of the retina. In controls, we temporarily limited the visual field to the central 10° to model peripheral loss. The central loss experienced by STGD patients led to an increase in RF size in the dorsal subdivisions of V1, V2, and V3. In contrast, peripheral loss in RP patients led to a bilateral increase in population RF sizes in V1 but a decrease in V2. Transient peripheral loss in controls led to an increase in RF size in V1 and a decrease in V2 and V3, regardless of the dorsal-ventral division of the cortical representation. Our findings suggest a dorsal-ventral difference in RF size in response to central visual field loss, likely reflecting the functional relevance of these divisions within the cortical representations of the visual field.
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