Cortical dynamics subserving visual apparent motion
<p>Motion can be perceived when static images are successively presented with a spatial shift. This type of motion is an illusion and is termed apparent motion (AM). Here we show, with a voltage sensitive dye applied to the visual cortex of the ferret, that presentation of a sequence of statio...
| Main Authors: | , , , , , |
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| Format: | Journal article |
| Language: | English |
| Published: |
Oxford University Press
2008
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| Subjects: |
| _version_ | 1826282571590270976 |
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| author | Ahmed, B Hanazawa, A Undeman, C Eriksson, D Valentiniene, S Roland, P |
| author_facet | Ahmed, B Hanazawa, A Undeman, C Eriksson, D Valentiniene, S Roland, P |
| author_sort | Ahmed, B |
| collection | OXFORD |
| description | <p>Motion can be perceived when static images are successively presented with a spatial shift. This type of motion is an illusion and is termed apparent motion (AM). Here we show, with a voltage sensitive dye applied to the visual cortex of the ferret, that presentation of a sequence of stationary, short duration, stimuli which are perceived to produce AM are, initially, mapped in areas 17 and 18 as separate stationary representations. But time locked to the offset of the 1st stimulus, a sequence of signals are elicited. First, an activation traverses cortical areas 19 and 21 in the direction of AM. Simultaneously, a motion dependent feedback signal from these areas activates neurons between areas 19/21 and areas 17/18. Finally, an activation is recorded, traveling always from the representation of the 1st to the representation of the next or succeeding stimuli. This activation elicits spikes from neurons situated between these stimulus representations in areas 17/18. This sequence forms a physiological mechanism of motion computation which could bind populations of neurons in the visual areas to interpret motion out of stationary stimuli.</p> |
| first_indexed | 2024-03-07T00:45:52Z |
| format | Journal article |
| id | oxford-uuid:84a2fab2-a73f-43bc-8d83-6bc8b807e43c |
| institution | University of Oxford |
| language | English |
| last_indexed | 2024-03-07T00:45:52Z |
| publishDate | 2008 |
| publisher | Oxford University Press |
| record_format | dspace |
| spelling | oxford-uuid:84a2fab2-a73f-43bc-8d83-6bc8b807e43c2022-03-26T21:52:21ZCortical dynamics subserving visual apparent motionJournal articlehttp://purl.org/coar/resource_type/c_dcae04bcuuid:84a2fab2-a73f-43bc-8d83-6bc8b807e43cMedical sciencesLife SciencesClinical laboratory sciencesEnglishOxford University Research Archive - ValetOxford University Press2008Ahmed, BHanazawa, AUndeman, CEriksson, DValentiniene, SRoland, P<p>Motion can be perceived when static images are successively presented with a spatial shift. This type of motion is an illusion and is termed apparent motion (AM). Here we show, with a voltage sensitive dye applied to the visual cortex of the ferret, that presentation of a sequence of stationary, short duration, stimuli which are perceived to produce AM are, initially, mapped in areas 17 and 18 as separate stationary representations. But time locked to the offset of the 1st stimulus, a sequence of signals are elicited. First, an activation traverses cortical areas 19 and 21 in the direction of AM. Simultaneously, a motion dependent feedback signal from these areas activates neurons between areas 19/21 and areas 17/18. Finally, an activation is recorded, traveling always from the representation of the 1st to the representation of the next or succeeding stimuli. This activation elicits spikes from neurons situated between these stimulus representations in areas 17/18. This sequence forms a physiological mechanism of motion computation which could bind populations of neurons in the visual areas to interpret motion out of stationary stimuli.</p> |
| spellingShingle | Medical sciences Life Sciences Clinical laboratory sciences Ahmed, B Hanazawa, A Undeman, C Eriksson, D Valentiniene, S Roland, P Cortical dynamics subserving visual apparent motion |
| title | Cortical dynamics subserving visual apparent motion |
| title_full | Cortical dynamics subserving visual apparent motion |
| title_fullStr | Cortical dynamics subserving visual apparent motion |
| title_full_unstemmed | Cortical dynamics subserving visual apparent motion |
| title_short | Cortical dynamics subserving visual apparent motion |
| title_sort | cortical dynamics subserving visual apparent motion |
| topic | Medical sciences Life Sciences Clinical laboratory sciences |
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