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A distributed theta network of error generation and processing in aging.

Vasil Kolev1, Michael Falkenstein2, Juliana Yordanova1

  • 1Institute of Neurobiology, Bulgarian Academy of Sciences, Acad. G. Bonchev str., bl. 23, Sofia, 1113 Bulgaria.

Cognitive Neurodynamics
|May 3, 2024
PubMed
Summary
This summary is machine-generated.

Aging alters brain networks involved in error processing. Older adults show distributed changes in motor theta oscillations, impacting performance monitoring and response control.

Keywords:
Cognitive agingEEGError processingPerformance monitoringTheta oscillations

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Area of Science:

  • Neuroscience
  • Cognitive Aging
  • Motor Control

Background:

  • A distributed theta network, centered in the medial frontal cortex, is vital for movement regulation.
  • Previous research suggests this network plays a role in monitoring and controlling actions.

Purpose of the Study:

  • To investigate how aging affects the involvement of the motor theta network in error processing.
  • To analyze the neurodynamics of motor theta oscillations during correct and incorrect responses in older adults.

Main Methods:

  • Recorded response-related potentials (RRPs) during a four-choice reaction task in older adults.
  • Decomposed RRPs in the time-frequency domain to analyze oscillatory theta activity.
  • Examined theta power, synchronization, and functional connectivity across cortical regions.

Main Results:

  • Errors significantly impacted motor theta oscillations beyond the medial frontal cortex.
  • Observed increased theta power, suppressed synchronization in pre-motor areas, and altered connectivity between frontal and sensorimotor regions.
  • Found suppressed connectivity and phase-synchronization in the posterior left hemisphere regardless of the hand used.

Conclusions:

  • Distributed error effects on motor theta oscillations confirm theta networks' role in performance monitoring.
  • Network reorganization in aging suggests medial frontal disengagement and difficulties in attention and response selection for older individuals.