Image from Eichenbaum (2000)
Memory in action: The role(s) of the hippocampus in decisions for reward
Cosyne workshops, Snowbird, Utah. March 10th, 2015
The hippocampus has long been understood to play a critical role in flexible relational learning, episodic memory, and navigation. More recently, a growing body of work implicates the hippocampus in value-based decision making. However, a dichotomy exists between research performed in different organisms and from distinct theoretical traditions. For instance, results in rodent models support an active role for the hippocampus in evaluating potential next-step actions and outcomes. Meanwhile, human research has mainly emphasized the role of the hippocampus in forming representations that may then support later decisions. Other divisions concern the nature of spatial versus more general relational processing, various algorithms for active sampling in support of decisions, and whether the hippocampus plays a part in tasks that require short-term memory or well-learned outcomes. These divergences are in part due to different experimental methods, but they also reveal fundamental gaps in the theory. Computational treatments exist that offer normative justifications for each of these roles, but to date few efforts have been made to unify these observations.
This workshop brings together for the first time many of the researchers behind the primary work to discuss the emerging computational frameworks that describe the role - or roles - of the hippocampus in decision making. Participants will work to understand what might be the core computations performed by the hippocampus to guide reward-based decision making and goal-directed behavior.
University College London
Building new neural representations using the hippocampus.
New York University
Separable effects of individual episodes in reinforcement learning: models, data, and aspirations.
The Johns Hopkins University
Motivational state and the content of hippocampal sequences.
A causal role for hippocampus in model-based planning in the rat.
The role of dopamine in setting the coordinates of the cognitive map.
How relational memory mechanisms in the hippocampus support decisions.
Design principles of the hippocampal cognitive map.
Hippocampal-cortical network dynamics of information-seeking decisions during exploratory learning.
University of California, San Francisco
Anterior cingulate cortex-hippocampal interactions during goal-driven behavior.