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• W2078652550 startingPage "10507" @default.
• W2078652550 abstract "Why do movements take a characteristic amount of time, and why do diseases that affect the reward system alter control of movements? Suppose that the purpose of any movement is to position our body in a more rewarding state. People and other animals discount future reward as a hyperbolic function of time. Here, we show that across populations of people and monkeys there is a correlation between discounting of reward and control of movements. We consider saccadic eye movements and hypothesize that duration of a movement is equivalent to a delay of reward. The hyperbolic cost of this delay not only accounts for kinematics of saccades in adults, it also accounts for the faster saccades of children, who temporally discount reward more steeply. Our theory explains why saccade velocities increase when reward is elevated, and why disorders in the encoding of reward, for example in Parkinson9s disease and schizophrenia, produce changes in saccade. We show that delay of reward elevates the cost of saccades, reducing velocities. Finally, we consider coordinated movements that include motion of eyes and head and find that their kinematics is also consistent with a hyperbolic, reward-dependent cost of time. Therefore, each voluntary movement carries a cost because its duration delays acquisition of reward. The cost depends on the value that the brain assigns to stimuli, and the rate at which it discounts this value in time. The motor commands that move our eyes reflect this cost of time." @default.
• W2078652550 created "2016-06-24" @default.
• W2078652550 creator A5024812694 @default.
• W2078652550 creator A5028793301 @default.
• W2078652550 creator A5088639811 @default.
• W2078652550 creator A5090664889 @default.
• W2078652550 date "2010-08-04" @default.
• W2078652550 modified "2023-10-12" @default.
• W2078652550 title "Temporal Discounting of Reward and the Cost of Time in Motor Control" @default.
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• W2078652550 doi "https://doi.org/10.1523/jneurosci.1343-10.2010" @default.
• W2078652550 hasPubMedCentralId "https://www.ncbi.nlm.nih.gov/pmc/articles/2926660" @default.
• W2078652550 hasPubMedId "https://pubmed.ncbi.nlm.nih.gov/20685993" @default.
• W2078652550 hasPublicationYear "2010" @default.
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