University of Florida • Pharmacodynamics

Decoding the neuronal ensembles of addiction and fear

We study how sparse patterns of neurons encode drug-seeking and stress memories—and how disrupting them could lead to new treatments for addiction and PTSD.

Warren Lab
Understanding aberrant learning
in psychiatric disorders

Our lab unravels the neurobiology of learned psychiatric disorders like drug addiction and post-traumatic stress disorder. Both involve aberrant learning that produces unusually strong and persistent memories.

By understanding how these memories form and promote disease states, we can find effective treatments. We use cutting-edge ensemble-specific manipulation techniques to probe neural circuits at single-neuron resolution.

Neuronal Ensembles

Sparse, distributed patterns of neurons selectively activated by specific cues and encoding distinct memories.

Daun02 Inactivation

A chemogenetic tool in Fos-LacZ rats to selectively ablate neurons activated during specific behaviors.

Translational Impact

Understanding extinction ensembles could leverage natural learning to reduce drug-seeking in human addicts.

Ongoing research questions
01

Self-administration vs. extinction ensembles

What role do neuronal ensembles play in self-administration versus extinction? We study how vmPFC, NAc, and BLA ensembles encode these opposing memories.

02

Natural vs. drug memory encoding

Do distinct neuronal ensembles encode natural versus drug memories? Are the vmPFC ensembles for food and cocaine truly separate populations?

03

Ensemble selection & formation

How are neuronal ensembles selected and recruited upon first drug exposure? We explore how synchronous activation selects and maintains ensembles.

Read more about our research →

Latest updates
Apr 16, 2026

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