Pre-target activity in visual cortex predicts behavioral performance on spatial and feature attention tasks

Barry Giesbrecht, Daniel H. Weissman, Marty G. Woldorff, George R Mangun

Research output: Contribution to journalArticle

68 Citations (Scopus)

Abstract

Physiological studies in humans and monkeys have revealed that, in response to an instruction to attend, areas of sensory cortex that code the attributes of the expected stimulus exhibit increases in neural activity prior to the arrival of the stimulus. Models of selective visual attention posit that these increases in activity give attended stimuli a processing advantage over distracting stimuli. Here, we test two key predictions of this view by using functional magnetic resonance imaging to record human brain activity during a cued voluntary orienting task. First, we tested whether pre-stimulus modulations are observed during both cued spatial and cued feature attention. Secondly, we tested whether the magnitude of pre-stimulus modulations predicts behavioral performance. Our results indicate that cue-triggered expectation of targets with particular spatial or nonspatial features activates areas of the visual cortex selective for these features. Furthermore, the magnitude of the cue-triggered modulations correlated with behavioral measures, such that those subjects who exhibited relatively large pre-stimulus modulations of activity performed better on the behavioral task. These findings support the view that top-down control systems bias activity in sensory cortices to favor the processing of expected target features and that this bias is related to behavior.

Original languageEnglish (US)
Pages (from-to)63-72
Number of pages10
JournalBrain Research
Volume1080
Issue number1
DOIs
StatePublished - Mar 29 2006

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Visual Cortex
Cues
Human Activities
Haplorhini
Magnetic Resonance Imaging
Brain

Keywords

  • Behavior
  • fMRI
  • Selective attention
  • Visual cortex

ASJC Scopus subject areas

  • Neuroscience(all)
  • Clinical Neurology
  • Developmental Biology
  • Molecular Biology

Cite this

Pre-target activity in visual cortex predicts behavioral performance on spatial and feature attention tasks. / Giesbrecht, Barry; Weissman, Daniel H.; Woldorff, Marty G.; Mangun, George R.

In: Brain Research, Vol. 1080, No. 1, 29.03.2006, p. 63-72.

Research output: Contribution to journalArticle

Giesbrecht, Barry ; Weissman, Daniel H. ; Woldorff, Marty G. ; Mangun, George R. / Pre-target activity in visual cortex predicts behavioral performance on spatial and feature attention tasks. In: Brain Research. 2006 ; Vol. 1080, No. 1. pp. 63-72.
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