Abstract:
:It has been shown that in the initial stages of motion processing, the ON and OFF pathways stay more or less separated. There is evidence that this distinction between motion signals from opposite contrast polarities remains at least partly intact in the integration stage of local motion information. At the same time, interactions between the two systems are also apparent. Here we constructed stimuli that contained a constant number of moving checks. The checks were either assigned only one contrast polarity, or contrast polarity was distributed across the checks either randomly or evenly. We investigated how the spatial configuration of the moving stimulus affected direction discrimination thresholds for the different polarity distributions. Our results provide new evidence for contrast-sign-specific integration of local motion signals within areas of limited size, and inhibitory interactions between these separate ON and OFF motion sensor pools.
journal_name
Vision Resjournal_title
Vision researchauthors
van der Smagt MJ,Breij EC,van de Grind WAdoi
10.1016/s0042-6989(00)00065-1subject
Has Abstractpub_date
2000-01-01 00:00:00pages
2037-45issue
15eissn
0042-6989issn
1878-5646pii
S0042-6989(00)00065-1journal_volume
40pub_type
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