Attenuation of neural responses in primary visual cortex during the attentional blink

Mark A. Williams, Troy A W Visser, Ross Cunnington, Jason B. Mattingley

    Research output: Contribution to journalArticlepeer-review

    34 Citations (Scopus)

    Abstract

    Information-processing bottlenecks are characteristic of many cognitive and neural systems. One such bottleneck is revealed by tasks in which rapidly successive stimulus events must be reported. Here, observers missed the second of two visual targets if it occurred within 700 ms of the first [an "attentional blink" (AB)], even though this second target could be reported accurately when the first item was ignored. Isolating neural responses to such rapid events has proven difficult because current magnetic resonance imaging methods rely on relatively sluggish changes in the brain's physiological response to sensory inputs. Here, we overcame this limitation by presenting successive visual targets at different spatial locations, thereby exploiting the retinotopic organization of early cortical visual areas to distinguish neural activity associated with successive target events. We show that neural activity in primary visual cortex is significantly modulated during the AB, and that this activity mirrors behavioral measures of target identification accuracy. The findings suggest that the neural signature of perceptual suppression during processing of rapidly successive stimuli is evident at the earliest stages of cortical sensory processing.

    Original languageEnglish
    Pages (from-to)9890-9894
    Number of pages5
    JournalJournal of Neuroscience
    Volume28
    Issue number39
    DOIs
    Publication statusPublished - 24 Sep 2008

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