Primary visual cortex activity along the apparent-motion trace reflects illusory perception

  • The illusion of apparent motion can be induced when visual stimuli are successively presented at different locations. It has been shown in previous studies that motion-sensitive regions in extrastriate cortex are relevant for the processing of apparent motion, but it is unclear whether primary visual cortex (V1) is also involved in the representation of the illusory motion path. We investigated, in human subjects, apparent-motion-related activity in patches of V1 representing locations along the path of illusory stimulus motion using functional magnetic resonance imaging. Here we show that apparent motion caused a blood-oxygenation-level-dependent response along the V1 representations of the apparent-motion path, including regions that were not directly activated by the apparent-motion-inducing stimuli. This response was unaltered when participants had to perform an attention-demanding task that diverted their attention away from the stimulus. With a bistable motion quartet, we confirmed that the activity was related to the conscious perception of movement. Our data suggest that V1 is part of the network that represents the illusory path of apparent motion. The activation in V1 can be explained either by lateral interactions within V1 or by feedback mechanisms from higher visual areas, especially the motion-sensitive human MT/V5 complex.

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Author:Lars Muckli, Axel Kohler, Nikolaus Kriegeskorte, Wolf SingerORCiDGND
URN:urn:nbn:de:hebis:30-26728
URL:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC1175820
DOI:https://doi.org/10.1371/journal.pbio.0030265
ISSN:1545-7885
ISSN:1544-9173
Pubmed Id:https://pubmed.ncbi.nlm.nih.gov/16018720
Parent Title (English):PLoS biology
Publisher:PLoS
Place of publication:Lawrence, Kan.
Contributor(s):Robert Zatorre
Document Type:Article
Language:English
Date of Publication (online):2006/05/15
Year of first Publication:2005
Publishing Institution:Universitätsbibliothek Johann Christian Senckenberg
Release Date:2006/05/15
Volume:3
Issue:(8):e265
Page Number:10
First Page:0001
Last Page:0010
Note:
Copyright: © 2005 Muckli et al. This is an open-access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
HeBIS-PPN:188754865
Institutes:Medizin / Medizin
Wissenschaftliche Zentren und koordinierte Programme / Frankfurt Institute for Advanced Studies (FIAS)
Dewey Decimal Classification:6 Technik, Medizin, angewandte Wissenschaften / 61 Medizin und Gesundheit / 610 Medizin und Gesundheit
Licence (German):License LogoCreative Commons - Namensnennung 2.0