Auditory attention activates peripheral visual cortex

Recent neuroimaging studies have revealed that putatively unimodal regions of visual cortex can be activated during auditory tasks in sighted as well as in blind subjects. However, the task determinants and functional significance of auditory occipital activations (AOAs) remains unclear. We examined...

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Veröffentlicht in:PloS one 2009-02, Vol.4 (2), p.e4645-e4645
Hauptverfasser: Cate, Anthony D, Herron, Timothy J, Yund, E William, Stecker, G Christopher, Rinne, Teemu, Kang, Xiaojian, Petkov, Christopher I, Disbrow, Elizabeth A, Woods, David L
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container_title PloS one
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creator Cate, Anthony D
Herron, Timothy J
Yund, E William
Stecker, G Christopher
Rinne, Teemu
Kang, Xiaojian
Petkov, Christopher I
Disbrow, Elizabeth A
Woods, David L
description Recent neuroimaging studies have revealed that putatively unimodal regions of visual cortex can be activated during auditory tasks in sighted as well as in blind subjects. However, the task determinants and functional significance of auditory occipital activations (AOAs) remains unclear. We examined AOAs in an intermodal selective attention task to distinguish whether they were stimulus-bound or recruited by higher-level cognitive operations associated with auditory attention. Cortical surface mapping showed that auditory occipital activations were localized to retinotopic visual cortex subserving the far peripheral visual field. AOAs depended strictly on the sustained engagement of auditory attention and were enhanced in more difficult listening conditions. In contrast, unattended sounds produced no AOAs regardless of their intensity, spatial location, or frequency. Auditory attention, but not passive exposure to sounds, routinely activated peripheral regions of visual cortex when subjects attended to sound sources outside the visual field. Functional connections between auditory cortex and visual cortex subserving the peripheral visual field appear to underlie the generation of AOAs, which may reflect the priming of visual regions to process soon-to-appear objects associated with unseen sound sources.
doi_str_mv 10.1371/journal.pone.0004645
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subjects Acoustics
Adult
Attention
Attention task
Auditory tasks
Blindness
Brain
Brain mapping
Cognitive ability
Cortex (auditory)
Cortex (occipital)
Female
Frequency dependence
Hearing
Humans
Intermodal
Intermodal transportation
Laboratories
Localization
Magnetic Resonance Imaging
Male
Medical imaging
Neuroimaging
Neurology
Neuroscience
Neuroscience/Cognitive Neuroscience
Neuroscience/Sensory Systems
Neurosciences
Priming
Retina
Sensory integration
Sound
Sound sources
Studies
Visual cortex
Visual Cortex - physiology
Visual field
Visual fields
Visual perception
Visual task performance
title Auditory attention activates peripheral visual cortex
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