Making decisions in the dark basement of the brain: A look back at the GPR model of action selection and the basal ganglia

TL;DR

This paper reviews the GPR computational model of the basal ganglia's role in action selection, highlighting its development, influence over two decades, and its significance as a foundational brain circuit model.

Contribution

It provides a comprehensive retrospective analysis of the GPR model, emphasizing its impact and evolution in understanding basal ganglia functions.

Findings

GPR model significantly influenced subsequent research.

The model accurately predicts basal ganglia behavior in action selection.

It remains a foundational framework in computational neuroscience.

Abstract

How does your brain decide what you will do next? Over the past few decades compelling evidence has emerged that the basal ganglia, a collection of nuclei in the fore- and mid-brain of all vertebrates, are vital to action selection. Gurney, Prescott, and Redgrave published an influential computational account of this idea in Biological Cybernetics in 2001. Here we take a look back at this pair of papers, outlining the "GPR" model contained therein, the context of that model's development, and the influence it has had over the past twenty years. Tracing its lineage into models and theories still emerging now, we are encouraged that the GPR model is that rare thing, a computational model of a brain circuit whose advances were directly built on by others.