Stimulus sequence context differentially modulates inhibition-related theta and delta band activity in a go/no-go task

Jeremy Harper, Stephen M. Malone, Matthew D. Bachman, Edward M. Bernat

Research output: Contribution to journalArticlepeer-review

23 Scopus citations

Abstract

Recent work suggests that dissociable activity in theta and delta frequency bands underlies several common ERP components, including the no-go N2/P3 complex, which can better index separable functional processes than traditional time-domain measures. Reports have also demonstrated that neural activity can be affected by stimulus sequence context information (i.e., the number and type of preceding stimuli). Stemming from prior work demonstrating that theta and delta index separable processes during response inhibition, the current study assessed sequence context in a go/no-go paradigm in which the number of go stimuli preceding each no-go was selectively manipulated. Principal component analysis of time-frequency representations revealed differential modulation of evoked theta and delta related to sequence context, where delta increased robustly with additional preceding go stimuli, while theta did not. Findings are consistent with the view that theta indexes simpler initial salience-related processes, while delta indexes more varied and complex processes related to a variety of task parameters.

Original languageEnglish (US)
Pages (from-to)712-722
Number of pages11
JournalPsychophysiology
Volume53
Issue number5
DOIs
StatePublished - May 1 2016

Bibliographical note

Publisher Copyright:
© 2016 Society for Psychophysiological Research.

Keywords

  • Delta
  • EEG
  • Response inhibition
  • Sequential effects
  • Theta
  • Time-frequency

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