Perceptual correlates of magnocellular and parvocellular channels: seeing form and depth in afterimages.

The chromatic and achromatic channels of psychophysical models do not map simply onto the parvocellular and magnocellular channels of electrophysiology because the parvo channel carries both chromatic and achromatic signals. If vision of stabilized images be mediated by the parvo channel, then this channel mediates form and depth percepts.