PSYC 351 Lecture Notes - Lecture 28: Coles Notes, Neuroeconomics, Striatum
8 Apr 2020
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Mechanism to represent the magnitude and valence of reward. Monitor how responses influence delivery of reinforcement. Neuroeconomics: brain designed to maximize reinforcement (profit) while minimizing effort (cost) What system could code for this: dopamine in the mesocorticolimbic pathway. All drugs of abuse increase in da in the striatum and the nucleus. Study with monkeys: da activity in the striatum when reinforcement given. Surgery to implant electrode in ventral tegmental area of monkey (origin of da pathway- Measure electrical activity of da neurons as monkey does a task, look at how da responses change with. Many learning trials: results: da released in response to reinforcers in environment (training shifts da signal to predictor & See a decrease in response to absence of reward). Can visualize blood flow in the brain, infer that increased blood flow to a specific area is associated with. Do not measure increased da, but increased activity in these dopaminergic brain areas.
