English
 
User Manual Privacy Policy Disclaimer Contact us
  Advanced SearchBrowse

Item

ITEM ACTIONSEXPORT
  Audio-visual object integration in human STS: Determinants of stimulus efficacy and inverse effectiveness

Werner, S., & Noppeney, U. (2008). Audio-visual object integration in human STS: Determinants of stimulus efficacy and inverse effectiveness. Poster presented at 9th International Multisensory Research Forum (IMRF 2008), Hamburg, Germany.

Item is

Basic

show hide
Item Permalink: http://hdl.handle.net/11858/00-001M-0000-0013-C84D-8 Version Permalink: http://hdl.handle.net/21.11116/0000-0003-909D-9
Genre: Poster

Files

show Files

Locators

show

Creators

show
hide
 Creators:
Werner, S1, 2, Author              
Noppeney, U1, 2, Author              
Affiliations:
1Research Group Cognitive Neuroimaging, Max Planck Institute for Biological Cybernetics, Max Planck Society, ou_1497804              
2Max Planck Institute for Biological Cybernetics, Max Planck Society, Spemannstrasse 38, 72076 Tübingen, DE, ou_1497794              

Content

show
hide
Free keywords: -
 Abstract: Combining fMRI and psychophysics, we investigated the neural mechanisms underlying the integration of higher-order audio-visual object features. In a target detection and a semantic categorization task, we presented subjects with pictures and sounds of tools or musical instruments while factorially manipulating the relative informativeness (degradation) of auditory and visual stimuli. Controlling for integration effects of low-level stimulus features, our experiment reveals integration of higher-order audio-visual object information selectively in anterior and posterior STS regions. Across subjects, audio-visual BOLD-interactions within these regions were strongly subadditive for intact stimuli and turned into additive effects for degraded stimuli. Across voxels, the probability to observe subadditivity increased with the strength of the unimodal BOLD-responses for both degraded and intact stimuli. Importantly, subjects’ multi-sensory behavioural benefit significantly predicted the mode of integration in STS : Subjects with greater benefits exhibited stronger superadditivity. In conclusion and according to the inverse effectiveness principle that is determined by stimulus efficacy, we demonstrate that the mode of multi-sensory integration in STS depends on stimulus informativeness, the voxel-specific responsiveness to unimodal stimulus components and the subject-specific multi-sensory behavioural benefit in object perception. The relationship between BOLD-responses and behavioural indices show the functional relevance of super- and subadditive modes of multi-sensory integration.

Details

show
hide
Language(s):
 Dates: 2008-07
 Publication Status: Published in print
 Pages: -
 Publishing info: -
 Table of Contents: -
 Rev. Type: -
 Identifiers: BibTex Citekey: 5263
 Degree: -

Event

show
hide
Title: 9th International Multisensory Research Forum (IMRF 2008)
Place of Event: Hamburg, Germany
Start-/End Date: 2008-07-16 - 2008-07-19

Legal Case

show

Project information

show

Source 1

show
hide
Title: 9th International Multisensory Research Forum (IMRF 2008)
Source Genre: Proceedings
 Creator(s):
Affiliations:
Publ. Info: -
Pages: - Volume / Issue: - Sequence Number: 188 Start / End Page: 275 Identifier: -