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Rebound activity and background offset step size. Averaged normalized PSTHs of 16 neurons with different background offset step sizes. Rebound activity is pronounced when the background changes from 8.6 to 0.02 cd/m2 (red curve). Little or no rebound activity was observed when background luminance was changed from 8.6 to 4.8 or 2.6 cd/m2, or kept fixed at 8.6 cd/m2.
