Biasing the brain's attentional set: II. Effects of selective intersensory attentional deployments on subsequent sensory processing

John J. Foxe, Gregory V. Simpson

Research output: Contribution to journalArticle

26 Citations (Scopus)

Abstract

This study used high-density mapping of human event-related potentials to examine the brain activity associated with selective information processing when subjects were cued on a trial-by-trial basis to perform a discrimination in either the visual or auditory modality. On each trial, word-cues (S1) instructed subjects to attend to features within one sensory-modality of an impending compound auditory-visual stimulus (S2) that arrived approximately 1-second following the cue. Subjects made a discrimination within the cued modality of the S2 stimulus. The spatio-temporal patterns of activity in response to the compound S2 stimulus were examined as a function of the sensory modality being attended. The earliest effects of intersensory attention on visual processing were seen subsequent to the initial activation of visual cortex, beginning at 80 ms and continuing into the P1 and N1 components of the visual ERP. The scalp-topography of this earliest modulation was consistent with modulation of activity in ventral visual stream areas. Thus, the locus of effects on visual S2 processing differed from the anticipatory parieto-occipital biasing activity that preceded S2 presentation. This pattern of effects strongly suggests that the anticipatory activity (following the cue) associated with sustaining the focus of attention during intersensory attention, at least in the context of this paradigm, does not operate as a simple gain mechanism in early visual sensory areas. Rather, attentional biasing can operate through a higher-order process whereby parieto-occipital cortices influence the subsequent flow of visual processing in the ventral stream.

Original languageEnglish (US)
Pages (from-to)393-401
Number of pages9
JournalExperimental Brain Research
Volume166
Issue number3-4
DOIs
StatePublished - Oct 2005
Externally publishedYes

Fingerprint

Cues
Brain
Occipital Lobe
Visual Cortex
Scalp
Automatic Data Processing
Evoked Potentials
Discrimination (Psychology)

ASJC Scopus subject areas

  • Neuroscience(all)

Cite this

Biasing the brain's attentional set : II. Effects of selective intersensory attentional deployments on subsequent sensory processing. / Foxe, John J.; Simpson, Gregory V.

In: Experimental Brain Research, Vol. 166, No. 3-4, 10.2005, p. 393-401.

Research output: Contribution to journalArticle

@article{dfc6d1d2aff64f68a51854d6fc1c97ec,
title = "Biasing the brain's attentional set: II. Effects of selective intersensory attentional deployments on subsequent sensory processing",
abstract = "This study used high-density mapping of human event-related potentials to examine the brain activity associated with selective information processing when subjects were cued on a trial-by-trial basis to perform a discrimination in either the visual or auditory modality. On each trial, word-cues (S1) instructed subjects to attend to features within one sensory-modality of an impending compound auditory-visual stimulus (S2) that arrived approximately 1-second following the cue. Subjects made a discrimination within the cued modality of the S2 stimulus. The spatio-temporal patterns of activity in response to the compound S2 stimulus were examined as a function of the sensory modality being attended. The earliest effects of intersensory attention on visual processing were seen subsequent to the initial activation of visual cortex, beginning at 80 ms and continuing into the P1 and N1 components of the visual ERP. The scalp-topography of this earliest modulation was consistent with modulation of activity in ventral visual stream areas. Thus, the locus of effects on visual S2 processing differed from the anticipatory parieto-occipital biasing activity that preceded S2 presentation. This pattern of effects strongly suggests that the anticipatory activity (following the cue) associated with sustaining the focus of attention during intersensory attention, at least in the context of this paradigm, does not operate as a simple gain mechanism in early visual sensory areas. Rather, attentional biasing can operate through a higher-order process whereby parieto-occipital cortices influence the subsequent flow of visual processing in the ventral stream.",
author = "Foxe, {John J.} and Simpson, {Gregory V.}",
year = "2005",
month = "10",
doi = "10.1007/s00221-005-2379-6",
language = "English (US)",
volume = "166",
pages = "393--401",
journal = "Experimental Brain Research",
issn = "0014-4819",
publisher = "Springer Verlag",
number = "3-4",

}

TY - JOUR

T1 - Biasing the brain's attentional set

T2 - II. Effects of selective intersensory attentional deployments on subsequent sensory processing

AU - Foxe, John J.

AU - Simpson, Gregory V.

PY - 2005/10

Y1 - 2005/10

N2 - This study used high-density mapping of human event-related potentials to examine the brain activity associated with selective information processing when subjects were cued on a trial-by-trial basis to perform a discrimination in either the visual or auditory modality. On each trial, word-cues (S1) instructed subjects to attend to features within one sensory-modality of an impending compound auditory-visual stimulus (S2) that arrived approximately 1-second following the cue. Subjects made a discrimination within the cued modality of the S2 stimulus. The spatio-temporal patterns of activity in response to the compound S2 stimulus were examined as a function of the sensory modality being attended. The earliest effects of intersensory attention on visual processing were seen subsequent to the initial activation of visual cortex, beginning at 80 ms and continuing into the P1 and N1 components of the visual ERP. The scalp-topography of this earliest modulation was consistent with modulation of activity in ventral visual stream areas. Thus, the locus of effects on visual S2 processing differed from the anticipatory parieto-occipital biasing activity that preceded S2 presentation. This pattern of effects strongly suggests that the anticipatory activity (following the cue) associated with sustaining the focus of attention during intersensory attention, at least in the context of this paradigm, does not operate as a simple gain mechanism in early visual sensory areas. Rather, attentional biasing can operate through a higher-order process whereby parieto-occipital cortices influence the subsequent flow of visual processing in the ventral stream.

AB - This study used high-density mapping of human event-related potentials to examine the brain activity associated with selective information processing when subjects were cued on a trial-by-trial basis to perform a discrimination in either the visual or auditory modality. On each trial, word-cues (S1) instructed subjects to attend to features within one sensory-modality of an impending compound auditory-visual stimulus (S2) that arrived approximately 1-second following the cue. Subjects made a discrimination within the cued modality of the S2 stimulus. The spatio-temporal patterns of activity in response to the compound S2 stimulus were examined as a function of the sensory modality being attended. The earliest effects of intersensory attention on visual processing were seen subsequent to the initial activation of visual cortex, beginning at 80 ms and continuing into the P1 and N1 components of the visual ERP. The scalp-topography of this earliest modulation was consistent with modulation of activity in ventral visual stream areas. Thus, the locus of effects on visual S2 processing differed from the anticipatory parieto-occipital biasing activity that preceded S2 presentation. This pattern of effects strongly suggests that the anticipatory activity (following the cue) associated with sustaining the focus of attention during intersensory attention, at least in the context of this paradigm, does not operate as a simple gain mechanism in early visual sensory areas. Rather, attentional biasing can operate through a higher-order process whereby parieto-occipital cortices influence the subsequent flow of visual processing in the ventral stream.

UR - http://www.scopus.com/inward/record.url?scp=27144450182&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=27144450182&partnerID=8YFLogxK

U2 - 10.1007/s00221-005-2379-6

DO - 10.1007/s00221-005-2379-6

M3 - Article

C2 - 16086143

AN - SCOPUS:27144450182

VL - 166

SP - 393

EP - 401

JO - Experimental Brain Research

JF - Experimental Brain Research

SN - 0014-4819

IS - 3-4

ER -