Advanced search
1 file | 3.63 MB Add to list

Effects of multimodal load on spatial monitoring as revealed by ERPs

(2015) PLOS ONE. 10(9).
Author
Organization
Project
Space LOAD
Abstract
While the role of selective attention in filtering out irrelevant information has been extensively studied, its characteristics and neural underpinnings when multiple environmental stimuli have to be processed in parallel are much less known. Building upon a dual-task paradigm that induced spatial awareness deficits for contralesional hemispace in right hemisphere-damaged patients, we investigated the electrophysiological correlates of multimodal load during spatial monitoring in healthy participants. The position of appearance of briefly presented, lateralized targets had to be reported either in isolation (single task) or together with a concurrent task, visual or auditory, which recruited additional attentional resources (dual-task). This top-down manipulation of attentional load, without any change of the sensory stimulation, modulated the amplitude of the first positive ERP response (P1) and shifted its neural generators, with a suppression of the signal in the early visual areas during both visual and auditory dual tasks. Furthermore, later N2 contralateral components elicited by left targets were particularly influenced by the concurrent visual task and were related to increased activation of the supramarginal gyrus. These results suggest that the right hemisphere is particularly affected by load manipulations, and confirm its crucial role in subtending automatic orienting of spatial attention and in monitoring both hemispaces.
Keywords
VISUOSPATIAL ATTENTION, POTENTIALS REVEAL, SELECTIVE ATTENTION, HUMAN BRAIN, PERCEPTUAL LOAD, ATTENTIONAL LOAD, TOP-DOWN MODULATION, PRIMARY VISUAL-CORTEX, RIGHT-HEMISPHERE STROKE, POSTERIOR PARIETAL CORTEX

Downloads

  • Bonato Spironelli et al Plos One 2015.pdf
    • full text
    • |
    • open access
    • |
    • PDF
    • |
    • 3.63 MB

Citation

Please use this url to cite or link to this publication:

MLA
Bonato, Mario et al. “Effects of Multimodal Load on Spatial Monitoring as Revealed by ERPs.” PLOS ONE 10.9 (2015): n. pag. Print.
APA
Bonato, M., Spironelli, C., Lisi, M., Priftis, K., & Zorzi, M. (2015). Effects of multimodal load on spatial monitoring as revealed by ERPs. PLOS ONE, 10(9).
Chicago author-date
Bonato, Mario, Chiara Spironelli, Matteo Lisi, Konstantinos Priftis, and Marco Zorzi. 2015. “Effects of Multimodal Load on Spatial Monitoring as Revealed by ERPs.” Plos One 10 (9).
Chicago author-date (all authors)
Bonato, Mario, Chiara Spironelli, Matteo Lisi, Konstantinos Priftis, and Marco Zorzi. 2015. “Effects of Multimodal Load on Spatial Monitoring as Revealed by ERPs.” Plos One 10 (9).
Vancouver
1.
Bonato M, Spironelli C, Lisi M, Priftis K, Zorzi M. Effects of multimodal load on spatial monitoring as revealed by ERPs. PLOS ONE. 2015;10(9).
IEEE
[1]
M. Bonato, C. Spironelli, M. Lisi, K. Priftis, and M. Zorzi, “Effects of multimodal load on spatial monitoring as revealed by ERPs,” PLOS ONE, vol. 10, no. 9, 2015.
@article{6978163,
  abstract     = {While the role of selective attention in filtering out irrelevant information has been extensively studied, its characteristics and neural underpinnings when multiple environmental stimuli have to be processed in parallel are much less known. Building upon a dual-task paradigm that induced spatial awareness deficits for contralesional hemispace in right hemisphere-damaged patients, we investigated the electrophysiological correlates of multimodal load during spatial monitoring in healthy participants. The position of appearance of briefly presented, lateralized targets had to be reported either in isolation (single task) or together with a concurrent task, visual or auditory, which recruited additional attentional resources (dual-task). This top-down manipulation of attentional load, without any change of the sensory stimulation, modulated the amplitude of the first positive ERP response (P1) and shifted its neural generators, with a suppression of the signal in the early visual areas during both visual and auditory dual tasks. Furthermore, later N2 contralateral components elicited by left targets were particularly influenced by the concurrent visual task and were related to increased activation of the supramarginal gyrus. These results suggest that the right hemisphere is particularly affected by load manipulations, and confirm its crucial role in subtending automatic orienting of spatial attention and in monitoring both hemispaces.},
  articleno    = {e0136719},
  author       = {Bonato, Mario and Spironelli, Chiara  and Lisi, Matteo and Priftis, Konstantinos and Zorzi, Marco},
  issn         = {1932-6203},
  journal      = {PLOS ONE},
  keywords     = {VISUOSPATIAL ATTENTION,POTENTIALS REVEAL,SELECTIVE ATTENTION,HUMAN BRAIN,PERCEPTUAL LOAD,ATTENTIONAL LOAD,TOP-DOWN MODULATION,PRIMARY VISUAL-CORTEX,RIGHT-HEMISPHERE STROKE,POSTERIOR PARIETAL CORTEX},
  language     = {eng},
  number       = {9},
  title        = {Effects of multimodal load on spatial monitoring as revealed by ERPs},
  url          = {http://dx.doi.org/10.1371/journal.pone.0136719},
  volume       = {10},
  year         = {2015},
}

Altmetric
View in Altmetric
Web of Science
Times cited: