English
 
User Manual Privacy Policy Disclaimer Contact us
  Advanced SearchBrowse

Item

ITEM ACTIONSEXPORT
  Intraparietal sulcus forms multisensory spatial priority maps

Rohe, T., & Noppeney, U. (2013). Intraparietal sulcus forms multisensory spatial priority maps. Poster presented at 43rd Annual Meeting of the Society for Neuroscience (Neuroscience 2013), San Diego, CA, USA.

Item is

Basic

show hide
Item Permalink: http://hdl.handle.net/21.11116/0000-0001-513B-2 Version Permalink: http://hdl.handle.net/21.11116/0000-0001-513C-1
Genre: Poster

Files

show Files

Locators

show
hide
Description:
-

Creators

show
hide
 Creators:
Rohe, T1, 2, Author              
Noppeney, U, Author              
Affiliations:
1Department Human Perception, Cognition and Action, Max Planck Institute for Biological Cybernetics, Max Planck Society, ou_1497797              
2Max Planck Institute for Biological Cybernetics, Max Planck Society, ou_1497794              

Content

show
hide
Free keywords: -
 Abstract: To form an accurate percept of the environment the brain integrates sensory signals weighted by their relative reliabilities (Ernst and Banks, 2002). Indeed, recent neurophysiological research has demonstrated that activity of multisensory MSTd neurons during a heading task is modulated by changes in cue reliability in line with predictions of optimal integration (Fetsch et al., 2012). Moreover, top-down influences like task-relevance modulate multisensory perception (Bertelson and Radeau, 1981). The current study investigated how the human brain integrates audiovisual signals into spatial representations depending on their relative reliability and task-relevance. Using fMRI, we characterized how these integration processes emerged along the visual and auditory processing hierarchies. Subjects (N = 5) were presented with synchronous audiovisual signals that were spatially congruent or discrepant at 4 positions along the azimuth. We manipulated visual reliability (low vs. high) and task-relevance (auditory vs. visual-selective localization). Multivariate decoding of spatial information from fMRI data revealed that multisensory influences on spatial representations were present already at the primary cortical level and progressively increased along the cortical hierarchies. Likewise, the influence of task-relevance increased. Most prominently, the intraparietal sulcus integrated audiovisual signals weighted by their relative reliabilities and task-relevance. Further, IPS showed the greatest correlation with participant’s behavioral crossmodal bias. Collectively, the results suggest that IPS forms a spatial priority map (Bisley and Goldberg, 2010) by integrating sensory signals weighted by their bottom-up reliability and top-down task-relevance.

Details

show
hide
Language(s):
 Dates: 2013-11
 Publication Status: Published in print
 Pages: -
 Publishing info: -
 Table of Contents: -
 Rev. Method: -
 Identifiers: -
 Degree: -

Event

show
hide
Title: 43rd Annual Meeting of the Society for Neuroscience (Neuroscience 2013)
Place of Event: San Diego, CA, USA
Start-/End Date: -

Legal Case

show

Project information

show

Source 1

show
hide
Title: 43rd Annual Meeting of the Society for Neuroscience (Neuroscience 2013)
Source Genre: Proceedings
 Creator(s):
Affiliations:
Publ. Info: -
Pages: - Volume / Issue: - Sequence Number: 456.14 Start / End Page: - Identifier: -