The striatum and beyond: contributions of the hippocampus to decision making
This chapter reviews existing data regarding the role of the hippocampus and the striatum in learning, and their modulation by dopamine, in order to provide a broader understanding of how learning guides decision making. In particular, it suggests that, while the striatum supports decisions based on gradual stimulus-response learning, the hippocampus supports decisions that depend upon episodic, contextual information and mnemonic flexibility. It describes an experiment with a novel paradigm that investigates the role of hippocampal-dependent memory processes in decision making, and demonstrates that representational processes characteristic of episodic memory emerge in the context of a reward-based decision-making task.
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