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Neural Signals in Red Nucleus during Reactive and Proactive Adjustments in Behavior.

Adam T Brockett1,2, Nicholas W Hricz1,2, Stephen S Tennyson1,2

  • 1Department of Psychology, University of Maryland, College Park, Maryland 20742.

The Journal of Neuroscience : the Official Journal of the Society for Neuroscience
|May 8, 2020
PubMed
Summary
This summary is machine-generated.

Neural signals in the red nucleus (RN) track movement direction and speed. RN activity adjusts motor output during cognitive control tasks, showing its role in reactive and proactive behavioral adjustments.

Keywords:
cognitive controlinhibitionmotorred nucleussingle-neuron recordingstop signal

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Area of Science:

  • Neuroscience
  • Cognitive Neuroscience
  • Motor Control

Background:

  • Cognitive control involves adjusting behavior, with known frontal and striatal involvement.
  • Limited research exists on motor signal changes during reactive and proactive motor adjustments.

Purpose of the Study:

  • To investigate neural signals in the red nucleus (RN) during cognitive control.
  • To characterize how motor signals in RN change during reactive and proactive behavioral adjustments.

Main Methods:

  • Recorded neural signals in the red nucleus (RN) of male and female rats.
  • Rats performed a novel variant of the stop-signal task to assess cognitive control.

Main Results:

  • RN activity represented movement direction and correlated with movement speed.
  • Directional movement signals in RN were amplified on STOP trials before response completion.
  • RN signal strength was modulated by cognitive control demands.

Conclusions:

  • Neural signals in RN integrate cognitive control signals to reshape motor outcomes.
  • RN plays a role in both reactive, within-trial adjustments and proactive, across-trial modulations of motor behavior.