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 visua...
| Main Authors: | , , , |
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| Format: | Article |
| Language: | English |
| Published: |
Public Library of Science (PLoS)
2005-08-01
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| Series: | PLoS Biology |
| Online Access: | http://europepmc.org/articles/PMC1175820?pdf=render |
| _version_ | 1818618131458818048 |
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| author | Lars Muckli Axel Kohler Nikolaus Kriegeskorte Wolf Singer |
| author_facet | Lars Muckli Axel Kohler Nikolaus Kriegeskorte Wolf Singer |
| author_sort | Lars Muckli |
| collection | DOAJ |
| description | 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. |
| first_indexed | 2024-12-16T17:16:43Z |
| format | Article |
| id | doaj.art-1847a7663c61450493f1d19a69be1f77 |
| institution | Directory Open Access Journal |
| issn | 1544-9173 1545-7885 |
| language | English |
| last_indexed | 2024-12-16T17:16:43Z |
| publishDate | 2005-08-01 |
| publisher | Public Library of Science (PLoS) |
| record_format | Article |
| series | PLoS Biology |
| spelling | doaj.art-1847a7663c61450493f1d19a69be1f772022-12-21T22:23:16ZengPublic Library of Science (PLoS)PLoS Biology1544-91731545-78852005-08-0138e26510.1371/journal.pbio.0030265Primary visual cortex activity along the apparent-motion trace reflects illusory perception.Lars MuckliAxel KohlerNikolaus KriegeskorteWolf SingerThe 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.http://europepmc.org/articles/PMC1175820?pdf=render |
| spellingShingle | Lars Muckli Axel Kohler Nikolaus Kriegeskorte Wolf Singer Primary visual cortex activity along the apparent-motion trace reflects illusory perception. PLoS Biology |
| title | Primary visual cortex activity along the apparent-motion trace reflects illusory perception. |
| title_full | Primary visual cortex activity along the apparent-motion trace reflects illusory perception. |
| title_fullStr | Primary visual cortex activity along the apparent-motion trace reflects illusory perception. |
| title_full_unstemmed | Primary visual cortex activity along the apparent-motion trace reflects illusory perception. |
| title_short | Primary visual cortex activity along the apparent-motion trace reflects illusory perception. |
| title_sort | primary visual cortex activity along the apparent motion trace reflects illusory perception |
| url | http://europepmc.org/articles/PMC1175820?pdf=render |
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