Lateralized power spectra of the EEG as an index of visuospatial attention

Rob H.J. van der Lubbe, Christian Utzerath

Research output: Contribution to journalArticleAcademicpeer-review

22 Citations (Scopus)
104 Downloads (Pure)

Abstract

The electroencephalogram (EEG) was measured in an endogenous orienting paradigm where symbolic cues indicated the likely side of to-be-discriminated targets. Combined results of eventrelated lateralizations (ERLs) and a newly derived measure from wavelet analyses that we applied on the raw EEG and individual event-related potentials (ERPs), the lateralized power spectra (LPS) and the LPS-ERP, respectively, confirmed the common view that endogenous orienting operates by anterior processes, probably originating from the frontal eye fields, modulating processing in parietal and occipital areas. the LPS data indicated that modulation takes place by increased inhibition of the irrelevant visual field and/or disinhibition of the relevant to-be-attended visual field. combined use of ERLs, the LPS, and the LPS-ERP indicated that most of the involved processes can be characterized as externally evoked, either or not with clear individual differences as some evoked effects were only visible in the LPS-ERP, whereas few processes seemed to have an internally induced nature. Use of the LPS and the LPS-ERP may be advantageous as it enables to determine the involvement of internally generated lateralized processes that are not strictly bound to an event like stimulus onset.
Original languageEnglish
Number of pages18
JournalAdvances in cognitive psychology
Volume9
Issue number4
DOIs
Publication statusPublished - 2013

Keywords

  • IR-87310
  • METIS-297888
  • Visuospatial attention
  • Inhibition
  • ERPs
  • ERLs
  • Wavelets

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