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Recurrent Processin...
Recurrent Processing in V1/V2 Contributes ot Categorization of Natural Scenes
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- Koivisto, Mika (författare)
- Centre for Cognitive Neuroscience, University of Turku, Finland / Department of Psychology, University of Turku, Finland
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- Railo, Henry (författare)
- Centre for Cognitive Neuroscience, University of Turku, Finland / Department of Psychology, University of Turku, Finland
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- Revonsuo, Antti (författare)
- Högskolan i Skövde,Institutionen för kommunikation och information,Forskningscentrum för Systembiologi,Centre for Cognitive Neuroscience, University of Turku, Finland / Department of Psychology, University of Turku, Finland,Kognitiv neurovetenskap och filosofi, Consciousness and Cognitive Neuroscience
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- Vanni, Simo (författare)
- Brain Research Unit and AMI centre, Low Temperature Laboratory, Aalto University School of Science and Technology, 00076 Aalto, Espoo, Finland
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- Salminen-Vaparanta, Niina (författare)
- Centre for Cognitive Neuroscience, University of Turku, Finland / Department of Psychology, University of Turku, Finland
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(creator_code:org_t)
- Society for Neuroscience, 2011
- 2011
- Engelska.
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Ingår i: Journal of Neuroscience. - : Society for Neuroscience. - 0270-6474 .- 1529-2401. ; 31:7, s. 2488-2492
- Relaterad länk:
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https://his.diva-por... (primary) (Raw object)
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https://urn.kb.se/re...
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https://doi.org/10.1...
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Abstract
Ämnesord
Stäng
- Humans are able to categorize complex natural scenes very rapidly and effortlessly, which has led to an assumption that such ultra-rapid categorization is driven by feedforward activation of ventral brain areas. However, recent accounts of visual perception stress the role of recurrent interactions that start rapidly after the activation of V1. To study whether or not recurrent processes play a causal role in categorization, we applied fMRI-guided transcranial magnetic stimulation on early visual cortex (V1/V2) and lateral occipital cortex (LO) while the participants categorized natural images as containing animals or not. The results showed that V1/V2 contributed to categorization speed and to subjective perception during a long activity period before and after the contribution of LO had started. This pattern of results suggests that recurrent interactions in visual cortex between areas along the ventral stream and striate cortex play a causal role in categorization and perception of natural scenes.
Nyckelord
- Natural sciences
- Naturvetenskap
- Consciousness and Cognitive Neuroscience
- Kognitiv neurovetenskap och filosofi
Publikations- och innehållstyp
- ref (ämneskategori)
- art (ämneskategori)
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