Medium Spiny Neurons Mediate Timing Perception in Coordination with Prefrontal Neurons in Primates.

Area of Science:

• Neuroscience
• Cognitive Science
• Behavioral Science

Background:

• Timing perception is crucial for navigating environments.
• Neural mechanisms for prospective and retrospective timing are not well understood.
• The roles of striatum and prefrontal cortex (PFC) in timing are being explored.

Purpose of the Study:

• To elucidate the functional roles of neuronal populations in the striatum and PFC in subjective time perception.
• To differentiate the neural processes underlying retrospective and prospective timing.
• To identify specific neuronal types involved in timing.

Main Methods:

• Recorded neural activity from over 3000 neurons in macaque monkeys using large-scale electrode arrays.
• Performed timing tasks to analyze neural responses.
• Utilized cell-type-specific manipulation to investigate neuronal functions.

Main Results:

• Retrospective and prospective timing are governed by separate neural processes.
• Medium spiny neurons (MSNs) in the striatum are critical for timing.
• D2-MSNs were identified as primary contributors to both prospective and retrospective timing.
• Coordination between the PFC and striatum is essential for effective timing.

Conclusions:

• This study advances the understanding of the neural basis of timing perception.
• Distinct neural mechanisms underlie different forms of timing.
• Specific neuronal populations and brain region coordination are vital for temporal processing.