English
 
User Manual Privacy Policy Disclaimer Contact us
  Advanced SearchBrowse

Item

ITEM ACTIONSEXPORT
  Acoustic cue selection and discrimination under degradation: Differential contributions of the inferior parietal and posterior temporal cortices

Scharinger, M., Henry, M., & Obleser, J. (2015). Acoustic cue selection and discrimination under degradation: Differential contributions of the inferior parietal and posterior temporal cortices. NeuroImage, 106, 373-381. doi:10.1016/j.neuroimage.2014.11.050.

Item is

Basic

show hide
Item Permalink: http://hdl.handle.net/11858/00-001M-0000-0029-AC8C-C Version Permalink: http://hdl.handle.net/21.11116/0000-0003-7995-D
Genre: Journal Article

Files

show Files

Locators

show

Creators

show
hide
 Creators:
Scharinger, Mathias1, Author              
Henry, Molly1, Author              
Obleser, Jonas1, Author              
Affiliations:
1Max Planck Research Group Auditory Cognition, MPI for Human Cognitive and Brain Sciences, Max Planck Society, Leipzig, DE, ou_751545              

Content

show
hide
Free keywords: Auditory categorization; fMRI parietal cortex; Planum temporale; Acoustic cues; Listening strategies
 Abstract: Auditory categorization is a vital skill for perceiving the acoustic environment. Categorization depends on the discriminability of the sensory input as well as on the ability of the listener to adaptively make use of the relevant features of the sound. Previous studies on categorization have focused either on speech sounds when studying discriminability or on visual stimuli when assessing optimal cue utilization. Here, by contrast, we examined neural sensitivity to stimulus discriminability and optimal cue utilization when categorizing novel, non-speech auditory stimuli not affected by long-term familiarity. In a functional magnetic resonance imaging (fMRI) experiment, listeners categorized sounds from two category distributions, differing along two acoustic dimensions: spectral shape and duration. By introducing spectral degradation after the first half of the experiment, we manipulated both stimulus discriminability and the relative informativeness of acoustic cues. Degradation caused an overall decrease in discriminability based on spectral shape, and therefore enhanced the informativeness of duration. A relative increase in duration-cue utilization was accompanied by increased activity in left parietal cortex. Further, discriminability modulated right planum temporale activity to a higher degree when stimuli were spectrally degraded than when they were not. These findings provide support for separable contributions of parietal and posterior temporal areas to perceptual categorization. The parietal cortex seems to support the selective utilization of informative stimulus cues, while the posterior superior temporal cortex as a primarily auditory brain area supports discriminability particularly under acoustic degradation.

Details

show
hide
Language(s): eng - English
 Dates: 2014-11-232014-12-032015-02-01
 Publication Status: Published in print
 Pages: -
 Publishing info: -
 Table of Contents: -
 Rev. Method: Peer
 Identifiers: DOI: 10.1016/j.neuroimage.2014.11.050
PMID: 25481793
Other: Epub 2014
 Degree: -

Event

show

Legal Case

show

Project information

show

Source 1

show
hide
Title: NeuroImage
Source Genre: Journal
 Creator(s):
Affiliations:
Publ. Info: Orlando, FL : Academic Press
Pages: - Volume / Issue: 106 Sequence Number: - Start / End Page: 373 - 381 Identifier: ISSN: 1053-8119
CoNE: https://pure.mpg.de/cone/journals/resource/954922650166