V1 neurons are tuned to perceptual borders in natural scenes.

Autor:	Papale P; Department of Vision and Cognition, Netherlands Institute for Neuroscience (KNAW), Amsterdam 1105 BA, Netherlands.; Momilab Research Unit, Institutions, Markets, Technologies School for Advanced Studies Lucca, Lucca 55100, Italy., Zuiderbaan W; Department of Computational Cognitive Neuroscience and Neuroimaging, Netherlands Institute for Neuroscience (Koninklijke Nederlandse Akademie van Wetenschappen), Amsterdam 1105 BA, Netherlands.; Spinoza Centre for Neuroimaging, Amsterdam 1105 BK, Netherlands., Teeuwen RRM; Department of Vision and Cognition, Netherlands Institute for Neuroscience (KNAW), Amsterdam 1105 BA, Netherlands., Gilhuis A; Department of Vision and Cognition, Netherlands Institute for Neuroscience (KNAW), Amsterdam 1105 BA, Netherlands., Self MW; Department of Vision and Cognition, Netherlands Institute for Neuroscience (KNAW), Amsterdam 1105 BA, Netherlands., Roelfsema PR; Department of Vision and Cognition, Netherlands Institute for Neuroscience (KNAW), Amsterdam 1105 BA, Netherlands.; Department of Integrative Neurophysiology, Vrije Universiteit Amsterdam 1081 HV, Netherlands.; Department of Neurosurgery, Academic Medical Centre, Amsterdam 1100 DD, Netherlands.; Laboratory of Visual Brain Therapy, Institut National de la Santé et de la Recherche Médicale, Centre National de la Recherche Scientifique, Institut de la Vision, Sorbonne Université, Paris F-75012, France., Dumoulin SO; Department of Computational Cognitive Neuroscience and Neuroimaging, Netherlands Institute for Neuroscience (Koninklijke Nederlandse Akademie van Wetenschappen), Amsterdam 1105 BA, Netherlands.; Spinoza Centre for Neuroimaging, Amsterdam 1105 BK, Netherlands.; Department of Experimental and Applied Psychology, Vrije Universiteit Amsterdam, Amsterdam 1181 BT, Netherlands.; Department of Experimental Psychology, Helmholtz Institute, Utrecht University, Utrecht 3584 CS, Netherlands.
Jazyk:	angličtina
Zdroj:	Proceedings of the National Academy of Sciences of the United States of America [Proc Natl Acad Sci U S A] 2024 Nov 12; Vol. 121 (46), pp. e2221623121. Date of Electronic Publication: 2024 Nov 04.
DOI:	10.1073/pnas.2221623121
Abstrakt:	The visual system needs to identify perceptually relevant borders to segment complex natural scenes. The primary visual cortex (V1) is thought to extract local borders, and higher visual areas are thought to identify the perceptually relevant borders between objects and the background. To test this conjecture, we used natural images that had been annotated by human observers who marked the perceptually relevant borders. We assessed the effect of perceptual relevance on V1 responses using human neuroimaging, macaque electrophysiology, and computational modeling. We report that perceptually relevant borders elicit stronger responses in the early visual cortex than irrelevant ones, even if simple features, such as contrast and the energy of oriented filters, are matched. Moreover, V1 neurons discriminate perceptually relevant borders surprisingly fast, during the early feedforward-driven activity at a latency of ~50 ms, indicating that they are tuned to the features that characterize them. We also revealed a delayed, contextual effect that enhances the V1 responses that are elicited by perceptually relevant borders at a longer latency. Our results reveal multiple mechanisms that allow V1 neurons to infer the layout of objects in natural images. Competing Interests: Competing interests statement:The authors declare no competing interest.
Databáze:	MEDLINE
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