Feature-Based Attention Modulates Orientation-Selective Responses in Human Visual Cortex

Taosheng Liu, Jonas Larsson, Marisa Carrasco

Research output: Contribution to journalArticle

Abstract

How does feature-based attention modulate neural responses? We used adaptation to quantify the effect of feature-based attention on orientation-selective responses in human visual cortex. Observers were adapted to two superimposed oblique gratings while attending to one grating only. We measured the magnitude of attention-induced orientation-selective adaptation both psychophysically, by the behavioral tilt aftereffect, and physiologically, using fMRI response adaptation. We found evidence for orientation-selective attentional modulation of neuronal responses-a lower fMRI response for the attended than the unattended orientation-in multiple visual areas, and a significant correlation between the magnitude of the tilt aftereffect and that of fMRI response adaptation in V1, the earliest site of orientation coding. These results show that feature-based attention can selectively increase the response of neuronal subpopulations that prefer the attended feature, even when the attended and unattended features are coded in the same visual areas and share the same retinotopic location.

Original languageEnglish (US)
Pages (from-to)313-323
Number of pages11
JournalNeuron
Volume55
Issue number2
DOIs
StatePublished - Jul 19 2007

Keywords

  • SYSBIO
  • SYSNEURO

ASJC Scopus subject areas

  • Neuroscience(all)

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