Functionally Independent Components of the Late Positive Event-Related Potential During Visual Spatial Attention

Abstract

Human event-related potentials (ERPs) were recorded from 10 subjects presented with visual target and nontarget stimuli at five screen locations and responding to targets presented at one of the locations. The late positive response complexes of 25-75 ERP average waveforms from the two task conditions were simultaneously analyzed with independent Component Analysis, a new computational method for blindly separating linearly mixed signals. Three spatially fixed, temporarily independent, behaviorally relevant, and physiologically plausible components were identified without reference to peeks in single-channel waveforms.

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Document Details

Document Type
Technical Report
Publication Date
Jan 21, 1999
Accession Number
ADA455756

Entities

People

  • Eric Courchesne
  • James Covington
  • Jeanne Townsend
  • Marissa Westeifleld
  • Scott Makeig
  • Terrence J. Sejnowski
  • Tzyy-Ping Jung

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  • Naval Health Research Center

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  • Biomedical

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  • Brain and Cognitive Science; Experimental Psychology; Cognitive Neuroscience
  • Vision Science/Vision Psychology/Cognitive Neuroscience.