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Abstract
Predicting the future position of moving objects is an essential cognitive function used for many daily activities, such as driving, walking and reaching. The experiments described in this paper show a marked diurnal modulation of motion prediction in inflating image perception. This motion prediction was shown to be more accurate in the afternoon than in the morning. In contrast, such modulation could not be found in deflating image perception. Such diurnal fluctuations may be mediated by circadian properties of retinal cone photoreceptors.
ACKNOWLEDGEMENTS
The authors thank Ms. Fusako Takao for excellent secretarial work, and Mr. Yuta Kurihara and Mr. Toshiki Nagano for assistance with data analysis.
DECLARATION OF INTEREST
The authors have no conflicts of interest to declare. This study was supported financially by the Grants-in-Aid #60225399 and #90408013 from The Japan Society for the Promotion of Science (M.T.).