title: Effects of EEG-vigilance regulation patterns on early perceptual processes in human visual cortex.
abstract: OBJECTIVE
  To investigate influences of EEG-vigilance regulation patterns on perceptual processing during sustained visual attention in early visual areas.
  
  
  METHODS
  We compared a subject group with stable vigilance regulation to a group with unstable EEG-vigilance regulation. A rapid serial visual presentation stream (RSVP) elicited a 7.5 Hz steady state visual evoked potential (SSVEP), a continuous sinusoidal brain response as a measure of attentional resource allocation during sustained attention in early visual cortex. Subjects performed a target discrimination task. 150 trials were divided into two parts (75 trials each, trial duration: 11 s).
  
  
  RESULTS
  A significant interaction vigilance group by experimental part provided significantly greater SSVEP amplitudes for the unstable group in the second compared to the first part of the experiment. Both groups showed training effects with increased hit rates and d'-values in the second part of the experiment.
  
  
  CONCLUSIONS
  The unexpected finding of SSVEP amplitude increase for the unstable group might be due to competitive interactions for neural resources between the alpha response and SSVEPs.
  
  
  CONCLUSIONS
  Individual patterns of EEG-vigilance regulation have a moderate impact on early sensory processing during sustained visual attention that is not paralleled in task performance.
authors.affiliation: Institute of Psychology, University of Leipzig, 04103, Germany.
authors.forename: Valeria
authors.initials: V
authors.lastname: Bekhtereva
authors.affiliation: Department of Psychiatry, University of Leipzig, Germany.
authors.forename: Christian
authors.initials: C
authors.lastname: Sander
authors.affiliation: Institute of Psychology, University of Leipzig, 04103, Germany.
authors.forename: Norman
authors.initials: N
authors.lastname: Forschack
authors.affiliation: Department of Psychiatry, University of Leipzig, Germany.
authors.forename: Sebastian
authors.initials: S
authors.lastname: Olbrich
authors.affiliation: Department of Psychiatry, University of Leipzig, Germany.
authors.forename: Ulrich
authors.initials: U
authors.lastname: Hegerl
authors.affiliation: Institute of Psychology, University of Leipzig, 04103, Germany. Electronic address: m.mueller@rz.uni-leipzig.de.
authors.forename: Matthias M
authors.initials: MM
authors.lastname: Müller
mesh_terms: D000328:Adult; D001288:Attention / Q000502:physiology*; D001921:Brain / Q000502:physiology; D004192:Discrimination, Psychological / Q000502:physiology*; D004569:Electroencephalography; D005074:Evoked Potentials, Visual; D005260:Female; D006801:Humans; D008297:Male; D010775:Photic Stimulation; D014793:Visual Cortex / Q000502:physiology*; D014796:Visual Perception; D055815:Young Adult
keywords: EEG-vigilance regulation pattern; Human EEG; Steady-state visual evoked potential (SSVEP); Sustained visual attention