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Corticostriatal coordination through coherent phase-amplitude coupling.

Constantin von Nicolai1, Gerhard Engler, Andrew Sharott

  • 1Centre for Integrative Neuroscience, University of Tübingen, 72076 Tübingen, Germany, Department of Neurophysiology and Pathophysiology, University Medical Center Hamburg-Eppendorf, 20246 Hamburg, Germany, and Medical Research Council Anatomical Neuropharmacology Unit, University of Oxford, Oxford OX1 3TH, United Kingdom.

The Journal of Neuroscience : the Official Journal of the Society for Neuroscience
|April 25, 2014
PubMed
Summary
This summary is machine-generated.

Synchronized brain oscillations, including theta and gamma waves, coordinate activity between the cortex and striatum during motor behavior. This cross-frequency coupling helps regulate neural communication in the corticostriatal axis.

Keywords:
amplitude correlationcorticostriatal axismotor behavioroscillationsphase coherencephase-amplitude coupling

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Area of Science:

  • Neuroscience
  • Systems Neuroscience
  • Motor Control

Background:

  • The corticostriatal axis, a key component of the basal ganglia, is vital for motor behavior.
  • Synchronized neuronal oscillations are hypothesized to mediate cortical-striatal interactions during behavior, but direct evidence is limited.

Purpose of the Study:

  • To investigate the role of neuronal oscillations in coupling the cortex and striatum during motor behavior.
  • To explore cross-frequency interactions between low- and high-frequency oscillations along the corticostriatal axis.

Main Methods:

  • Electrophysiological recordings of neuronal oscillations in the cortex and striatum of rats.
  • Analysis of oscillations during rest and treadmill running conditions.
  • Investigation of phase-amplitude and phase-phase coupling between oscillatory signals.

Main Results:

  • Prominent theta and gamma oscillations were observed in both cortex and striatum, with peak frequencies scaling with motor demand.
  • Functional coupling was established through theta-gamma phase-amplitude coupling.
  • Corticostriatal theta oscillations exhibited phase coupling, linking the two structures.

Conclusions:

  • Local phase-amplitude coupling and corticostriatal theta phase coupling jointly mediate the temporal correlation of gamma bursts between cortex and striatum.
  • Coherent phase-amplitude coupling represents a potential general mechanism for regulating neuronal interactions within the corticostriatal axis and other brain networks.