Midbrain Dopamine Neurons Encode a Quantitative Reward Prediction Error Signal
نویسندگان
چکیده
منابع مشابه
Midbrain Dopamine Neurons Encode a Quantitative Reward Prediction Error Signal
The midbrain dopamine neurons are hypothesized to provide a physiological correlate of the reward prediction error signal required by current models of reinforcement learning. We examined the activity of single dopamine neurons during a task in which subjects learned by trial and error when to make an eye movement for a juice reward. We found that these neurons encoded the difference between th...
متن کاملThe Reward Signal of Midbrain Dopamine Neurons.
Dopamine projections from the midbrain to striatum and frontal cortex play a major role in behavioral reactions controlled by rewards. Recent experiments have shown that dopamine neurons code the discrepancy between the prediction and occurrence of rewards and in this way signal a crucial learning term for approach behavior.
متن کاملDopamine reward prediction error coding
Reward prediction errors consist of the differences between received and predicted rewards. They are crucial for basic forms of learning about rewards and make us strive for more rewards-an evolutionary beneficial trait. Most dopamine neurons in the midbrain of humans, monkeys, and rodents signal a reward prediction error; they are activated by more reward than predicted (positive prediction er...
متن کاملMidbrain dopamine neurons signal aversion in a reward-context-dependent manner
Dopamine is thought to regulate learning from appetitive and aversive events. Here we examined how optogenetically-identified dopamine neurons in the lateral ventral tegmental area of mice respond to aversive events in different conditions. In low reward contexts, most dopamine neurons were exclusively inhibited by aversive events, and expectation reduced dopamine neurons' responses to reward a...
متن کاملAxiomatic methods, dopamine and reward prediction error.
The phasic firing rate of midbrain dopamine neurons has been shown to respond both to the receipt of rewarding stimuli, and the degree to which such stimuli are anticipated by the recipient. This has led to the hypothesis that these neurons encode reward prediction error (RPE)-the difference between how rewarding an event is, and how rewarding it was expected to be. However, the RPE model is on...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
ژورنال
عنوان ژورنال: Neuron
سال: 2005
ISSN: 0896-6273
DOI: 10.1016/j.neuron.2005.05.020