Specialized coding patterns among dorsomedial prefrontal neuronal ensembles predict conditioned reward seeking.

Area of Science:

• Neuroscience
• Behavioral Science

Background:

• The dorsomedial prefrontal cortex (dmPFC) contains distinct cell populations involved in reward-seeking behaviors.
• Significant cell-to-cell variability within dmPFC populations necessitates higher-resolution analysis for understanding information processing.

Purpose of the Study:

• To investigate the activity patterns of dmPFC excitatory neurons during Pavlovian reward conditioning.
• To characterize neuronal ensembles encoding reward, cues, and behavioral responses.

Main Methods:

• Utilized two-photon calcium imaging in awake, behaving mice.
• Monitored dmPFC excitatory neuron activity throughout Pavlovian reward conditioning sessions.

Main Results:

• Identified five unique neuronal ensembles encoding specialized information about sucrose reward, predictive cues, and behavioral responses.
• Observed differential emergence and stabilization of these ensembles across training sessions post-learning.
• Demonstrated improved predictive validity of dmPFC activity dynamics for behavioral conditioning variables.

Conclusions:

• Characterized complex dmPFC neuronal ensemble dynamics during reward learning.
• Showcased how these ensembles stably predict reward availability and the initiation of conditioned reward seeking.