Color and luminance share a common motion pathway.
Following exposure to a moving grating of bars differing only in luminance, a motion aftereffect (MAE) is observed on a stationary grating of bars differing only in chrominance. This suggests that the motion of equiluminous chromatic stimuli is sensed by a channel that responds to both luminance and chrominance and not by a separate channel specialized for the motion of colored stimuli. However, adding color to a low contrast luminance stimulus actually reduces its effectiveness at creating or nulling a MAE, indicating that the response of the motion pathway to color is qualitively different from its response to luminance. In addition, a chromatic stimulus demonstrates a dissociation between perceived speed, MAE speed and speed required to null the MAE that is absent for a luminance stimulus.
D000221:Adaptation, Ocular; D003118:Color Perception / Q000502:physiology; D005260:Female; D005366:Figural Aftereffect / Q000502:physiology*; D005556:Form Perception / Q000502:physiology*; D006801:Humans; D008027:Light; D008297:Male; D009039:Motion Perception / Q000502:physiology*; D010364:Pattern Recognition, Visual / Q000502:physiology*; D010783:Photometry; D013997:Time Factors; D014795:Visual Pathways / Q000502:physiology