title: Spatial and chromatic antagonism between the long- and middle-wavelength cones in the detection of long-wavelength flashes.
abstract: Field additivity was tested for small red increments on small and large adapting fields. The results for a large adapting field showed the failure of field additivity of the cancellation type, providing strong evidence for cone-antagonistic coding, while the results for a small adapting field showed field additivity. The cancellation effect took place concurrently with the spatial sensitization effect, thus suggesting that the spatial and chromatic antagonism occur concomitantly at some stage in the detection pathway.
mesh_terms: D003118:Color Perception / Q000502:physiology; D006801:Humans; D010786:Photoreceptor Cells / Q000502:physiology*; D012684:Sensory Thresholds; D014796:Visual Perception / Q000502:physiology*