Distinct roles of prefrontal cortex neurons in set shifting

Area of Science:

• Neuroscience
• Cognitive Science
• Behavioral Science

Background:

• Cognitive flexibility is crucial for adapting behavior to changing environments.
• Prefrontal cortex (PFC) functions are essential for cognitive flexibility.
• The precise neurophysiological mechanisms by which the PFC supports cognitive flexibility remain under investigation.

Purpose of the Study:

• To investigate the neurophysiological basis of cognitive flexibility within the PFC.
• To identify neuronal activity patterns in the PFC during a task requiring behavioral adaptation.

Main Methods:

• Recorded single-unit spiking activity from PFC neurons in mice.
• Utilized the attentional set-shifting task to assess cognitive flexibility.
• Employed regression models to analyze neuronal activity in relation to task variables.

Main Results:

• Identified distinct subgroups of PFC neurons encoding task context, choice, and trial outcome.
• Found that fast-spiking neurons were more involved in representing outcome and choice compared to regular-spiking neurons.
• Demonstrated that task context and trial outcome modulated choice-encoding neurons in a cell type- and rule-dependent manner.

Conclusions:

• PFC neurons exhibit differential engagement based on cell type during behavioral set shifting.
• Contextual rule representation and trial outcome monitoring by PFC neurons are critical for flexible behavioral switching.