Topic: model-free behavior

Multiple brain regions are involved in integrating reward to drive action selection, with rich representations of reward history in the striatum, retrosplenial cortex, and frontal areas. A major challenge in dissecting the circuits that govern reward-guided behavior is the existence of multiple strategies for reward maximization. For instance, in dynamic environments, mice can engage in both model-free behavior, where they update action values from trial to trial, and inference-based learning, where they use an internal model to infer the current world state. These two modes are challenging to