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Temporal Dynamics of Event-Related Potentials during Inhibitory Control Characterize Age-Related Neural Compensation.

Elizabeth R Paitel1, Kristy A Nielson1,2

  • 1Department of Psychology, Marquette University, Milwaukee, WI 53201, USA.

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|August 4, 2022
PubMed
Summary
This summary is machine-generated.

Older adults show different brain activity patterns during inhibitory control compared to younger adults, with distinct recruitment in conflict monitoring and inhibitory evaluation processes.

Keywords:
N200P300cognitive agingelectroencephalographyevent-related potentialsexecutive functioninhibitory controlneural recruitment

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Area of Science:

  • Neuroscience
  • Cognitive Aging
  • Human Electrophysiology

Background:

  • Executive functions, like inhibitory control, rely on frontal lobe and non-dominant hemisphere recruitment.
  • Age-related changes in the spatio-temporal processing of inhibition are not well understood.
  • Event-related potentials (ERPs) offer precise temporal analysis of cognitive processes.

Purpose of the Study:

  • To investigate age-related differences in the functional lateralization of N200 and P300 during successful inhibition.
  • To examine the spatio-temporal dynamics of N200 and P300 using principal components analysis (PCA) across age groups.
  • To elucidate age-specific recruitment patterns in conflict monitoring and inhibitory control.

Main Methods:

  • Utilized event-related potentials (ERPs) to measure N200 and P300 components.
  • Employed temporal principal components analysis (PCA) to analyze spatio-temporal dynamics.
  • Compared young and healthy older adults performing successful stop-signal inhibition tasks.

Main Results:

  • Young adults showed left-dominant N200; older adults exhibited larger amplitudes and right-dominant N200 with anterior distribution.
  • P300 amplitudes were right-dominant in young adults, but bilateral with greater left-hemisphere activation in older adults.
  • P300 involved one PCA factor in young adults but two distinct factors (parieto-occipital and anterior) in older adults.

Conclusions:

  • Conflict monitoring (N200) and inhibitory evaluation/adaptation (P300) exhibit distinct age-related functional asymmetries.
  • Older adults display lateralized conflict processing and bilateral evaluation/adaptation, with anterior recruitment common to both.
  • These findings provide a detailed understanding of age-related compensatory brain activation patterns.