Modulation of orientation-selective neurons by motion: when additive, when multiplicative?
The recurrent interaction among orientation-selective neurons in the primary visual cortex (V1) is suited to enhance contours in a noisy visual scene. Motion is known to have a strong pop-up effect in perceiving contours, but how motion-sensitive neurons in V1 support contour detection remains vastl...
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| Format: | Article |
| Language: | English |
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Frontiers Media S.A.
2014-06-01
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| Series: | Frontiers in Computational Neuroscience |
| Subjects: | |
| Online Access: | http://journal.frontiersin.org/Journal/10.3389/fncom.2014.00067/full |
| _version_ | 1818014435455795200 |
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| author | Torsten eLüdge Robert eUrbanczik Walter eSenn |
| author_facet | Torsten eLüdge Robert eUrbanczik Walter eSenn |
| author_sort | Torsten eLüdge |
| collection | DOAJ |
| description | The recurrent interaction among orientation-selective neurons in the primary visual cortex (V1) is suited to enhance contours in a noisy visual scene. Motion is known to have a strong pop-up effect in perceiving contours, but how motion-sensitive neurons in V1 support contour detection remains vastly elusive. Here we suggest how the various types of motion-sensitive neurons observed in V1 should be wired together in a micro-circuitry to optimally extract contours in the visual scene. Motion-sensitive neurons can be selective about the direction of motion occurring at some spot or respond equally to all directions (pandirectional). We show that, in the light of figure-ground segregation, direction-selective motion neurons should additively modulate the corresponding orientation-selective neurons with preferred orientation orthogonal to the motion direction. In turn, to maximally enhance contours, pandirectional motion neurons should multiplicatively modulate all orientation-selective neurons with co-localized receptive fields. This multiplicative modulation amplifies the local V1-circuitry among co-aligned orientation-selective neurons for detecting elongated contours. We suggest that the additive modulation by direction- specific motion neurons is achieved through synaptic projections to the somatic region, and the multiplicative modulation by pandirectional motion neurons through projections to the apical region of orientation-specific pyramidal neurons. For the purpose of contour detection, the V1- intrinsic integration of motion information is advantageous over a downstream integration as it exploits the recurrent V1-circuitry designed for that task. |
| first_indexed | 2024-04-14T06:44:33Z |
| format | Article |
| id | doaj.art-2f130d34edb14d0c9eebab4c2625a2a0 |
| institution | Directory Open Access Journal |
| issn | 1662-5188 |
| language | English |
| last_indexed | 2024-04-14T06:44:33Z |
| publishDate | 2014-06-01 |
| publisher | Frontiers Media S.A. |
| record_format | Article |
| series | Frontiers in Computational Neuroscience |
| spelling | doaj.art-2f130d34edb14d0c9eebab4c2625a2a02022-12-22T02:07:12ZengFrontiers Media S.A.Frontiers in Computational Neuroscience1662-51882014-06-01810.3389/fncom.2014.0006779020Modulation of orientation-selective neurons by motion: when additive, when multiplicative?Torsten eLüdge0Robert eUrbanczik1Walter eSenn2University of BernUniversity of BernUniversity of BernThe recurrent interaction among orientation-selective neurons in the primary visual cortex (V1) is suited to enhance contours in a noisy visual scene. Motion is known to have a strong pop-up effect in perceiving contours, but how motion-sensitive neurons in V1 support contour detection remains vastly elusive. Here we suggest how the various types of motion-sensitive neurons observed in V1 should be wired together in a micro-circuitry to optimally extract contours in the visual scene. Motion-sensitive neurons can be selective about the direction of motion occurring at some spot or respond equally to all directions (pandirectional). We show that, in the light of figure-ground segregation, direction-selective motion neurons should additively modulate the corresponding orientation-selective neurons with preferred orientation orthogonal to the motion direction. In turn, to maximally enhance contours, pandirectional motion neurons should multiplicatively modulate all orientation-selective neurons with co-localized receptive fields. This multiplicative modulation amplifies the local V1-circuitry among co-aligned orientation-selective neurons for detecting elongated contours. We suggest that the additive modulation by direction- specific motion neurons is achieved through synaptic projections to the somatic region, and the multiplicative modulation by pandirectional motion neurons through projections to the apical region of orientation-specific pyramidal neurons. For the purpose of contour detection, the V1- intrinsic integration of motion information is advantageous over a downstream integration as it exploits the recurrent V1-circuitry designed for that task.http://journal.frontiersin.org/Journal/10.3389/fncom.2014.00067/fullIllusionsmotionVisual SystemV1Modelcontour integration |
| spellingShingle | Torsten eLüdge Robert eUrbanczik Walter eSenn Modulation of orientation-selective neurons by motion: when additive, when multiplicative? Frontiers in Computational Neuroscience Illusions motion Visual System V1 Model contour integration |
| title | Modulation of orientation-selective neurons by motion: when additive, when multiplicative? |
| title_full | Modulation of orientation-selective neurons by motion: when additive, when multiplicative? |
| title_fullStr | Modulation of orientation-selective neurons by motion: when additive, when multiplicative? |
| title_full_unstemmed | Modulation of orientation-selective neurons by motion: when additive, when multiplicative? |
| title_short | Modulation of orientation-selective neurons by motion: when additive, when multiplicative? |
| title_sort | modulation of orientation selective neurons by motion when additive when multiplicative |
| topic | Illusions motion Visual System V1 Model contour integration |
| url | http://journal.frontiersin.org/Journal/10.3389/fncom.2014.00067/full |
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