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Temporal dynamics of lateralized ERP components elicited during endogenous attentional shifts to relevant tactile events

Published online by Cambridge University Press:  06 January 2003

JOSÉ VAN VELZEN ,
BETTINA FORSTER  and
MARTIN EIMER
JOSÉ VAN VELZEN
Affiliation:
Department of Psychology, Birkbeck College, University of London, London, UK
BETTINA FORSTER
Affiliation:
Department of Psychology, Birkbeck College, University of London, London, UK
MARTIN EIMER
Affiliation:
Department of Psychology, Birkbeck College, University of London, London, UK
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Abstract

To investigate the temporal dynamics of lateralized event-related brain potential (ERP) components elicited during covert shifts of spatial attention, ERPs were recorded in a task where central visual symbolic cues instructed participants to direct attention to their left or right hand in order to detect infrequent tactile targets presented to that hand, and to ignore tactile stimuli presented to the other hand, as well as all randomly intermingled peripheral visual stimuli. In different blocks, the stimulus onset asynchrony (SOA) between cue and target was 300 ms, 700 ms, or 1,100 ms. Anterior and posterior ERP modulations sensitive to the direction of an attentional shift were time-locked to the attentional cue, rather than to the anticipated arrival of a task-relevant stimulus. These components thus appear to reflect central attentional control rather than the anticipatory preparation of sensory areas. In addition, attentional modulations of ERPs to task-irrelevant visual stimuli were found, providing further evidence for crossmodal links in spatial attention between touch and vision.

Keywords

Tactile-spatial attentionAttentional orientingCross-modal attentionAttentional controlEvent-related brain potentials
Type
BRIEF REPORT
Information
Psychophysiology , Volume 39 , Issue 6 , November 2002 , pp. 874 - 878
Copyright
2002 Society for Psychophysiological Research

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