Adaptation to motion produces a motion aftereffect (MAE), where illusory, oppositely-
directed motion is perceived when viewing a stationary image. A common hypothesis for
motion adaptation is that it reflects an imbalance of activity caused by neuronal fatigue.
However, the perceptual MAE exhibits storage, in that the MAE appears even after a
prolonged period of darkness is interposed between the adapting stimulus and the test,
suggesting that fatigue cannot explain the perceptual MAE. We asked whether neural …