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Transition from predictable to variable motor cortex and striatal ensemble patterning during behavioral exploration.

Sravani Kondapavulur1,2,3,4, Stefan M Lemke3,4,5, David Darevsky1,2,3,4

  • 1Bioengineering Graduate Program, University of California San Francisco, San Francisco, CA, USA.

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Summary
This summary is machine-generated.

Neural variability in the motor cortex and striatum enables flexible switching between precise movements and behavioral exploration to adapt to environmental changes.

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Area of Science:

  • Neuroscience
  • Motor Control
  • Behavioral Plasticity

Background:

  • Animals automate actions for environmental consistency but need flexibility for change.
  • The primary motor cortex (M1) role in precise movement vs. exploration during errors is unclear.

Purpose of the Study:

  • Investigate how M1 and dorsolateral striatum (DLS) support both precise action and behavioral exploration.
  • Understand neural mechanisms underlying adaptation to consistent errors in motor tasks.

Main Methods:

  • Simultaneous electrophysiological monitoring in M1 and DLS during a reach-to-grasp task in rats.
  • Analysis of neural variability and ensemble patterning during error correction and strategy convergence.
  • Intracranial microstimulation in M1 with varying patterns to assess movement variability.

Main Results:

  • Behavioral exploration correlated with increased M1 and DLS neural variability.
  • Successful strategy convergence was associated with restored M1 and DLS neural patterning.
  • Variable M1 stimulation increased movement variability compared to reliable stimulation.

Conclusions:

  • M1 and DLS exhibit flexible neural modes for distinct behavioral states.
  • Motor and striatal circuits can shift between reliable patterning for automation and variable patterning for exploration.
  • This flexibility is crucial for adapting motor behavior to environmental challenges.