Dynamic Salience Processing in Paraventricular Thalamus Gates Associative Learning

Overview

Journal Science

Specialty Science

Date 2018 Oct 27

PMID 30361366

Citations 76

Authors

Yingjie Zhu

Gregory Nachtrab

Piper C Keyes

William E Allen

Liqun Luo

Xiaoke Chen

Affiliations

Soon will be listed here.

Abstract

The salience of behaviorally relevant stimuli is dynamic and influenced by internal state and external environment. Monitoring such changes is critical for effective learning and flexible behavior, but the neuronal substrate for tracking the dynamics of stimulus salience is obscure. We found that neurons in the paraventricular thalamus (PVT) are robustly activated by a variety of behaviorally relevant events, including novel ("unfamiliar") stimuli, reinforcing stimuli and their predicting cues, as well as omission of the expected reward. PVT responses are scaled with stimulus intensity and modulated by changes in homeostatic state or behavioral context. Inhibition of the PVT responses suppresses appetitive or aversive associative learning and reward extinction. Our findings demonstrate that the PVT gates associative learning by providing a dynamic representation of stimulus salience.

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