English
 
User Manual Privacy Policy Disclaimer Contact us
  Advanced SearchBrowse

Item

ITEM ACTIONSEXPORT
  Multiple brain signatures of integration in the comprehension of degraded speech

Obleser, J., & Kotz, S. A. (2011). Multiple brain signatures of integration in the comprehension of degraded speech. NeuroImage, 55(2), 713-723. doi:10.1016/j.neuroimage.2010.12.020.

Item is

Basic

show hide
Item Permalink: http://hdl.handle.net/11858/00-001M-0000-0011-52DA-1 Version Permalink: http://hdl.handle.net/11858/00-001M-0000-002B-FFA9-A
Genre: Journal Article

Files

show Files

Locators

show

Creators

show
hide
 Creators:
Obleser, Jonas1, 2, Author              
Kotz, Sonja A.3, Author              
Affiliations:
1Department Neuropsychology, MPI for Human Cognitive and Brain Sciences, Max Planck Society, ou_634551              
2Max Planck Research Group Auditory Cognition, MPI for Human Cognitive and Brain Sciences, Max Planck Society, ou_751545              
3Minerva Research Group Neurocognition of Rhythm in Communication, MPI for Human Cognitive and Brain Sciences, Max Planck Society, ou_634560              

Content

show
hide
Free keywords: EEG; Auditory; Speech comprehension; Semantic processing; N100; N400; Gamma
 Abstract: When listening to speech under adverse conditions, expectancies resulting from semantic context can have a strong impact on comprehension. Here we ask how minimal variations in semantic context (cloze probability) affect the unfolding comprehension of acoustically degraded speech. Three main results are observed in the brain electric response. First, auditory evoked responses to a degraded sentence's onset (N100) correlate with participants' comprehension scores, but are generally more vigorous for more degraded sentences. Second, a pronounced N400 in response to low-cloze sentence-final words, reflecting the integration effort of words into context, increases linearly with improving speech intelligibility. Conversely, transient enhancement in Gamma band power (γ, ~ 40–70 Hz) during high-cloze sentence-final words (~ 600 ms) reflects top-down-facilitated integration. This γ-band effect also varies parametrically with signal quality. Third, a negative correlation of N100 amplitude at sentence onset and the later γ-band response is found in moderately degraded speech. This reflects two partly distinct neural strategies when dealing with moderately degraded speech; a more “bottom-up,” resource-allocating, and effortful versus a more “top-down,” associative and facilitatory strategy. Results also emphasize the non-redundant contributions of phase-locked (evoked) and non-phase-locked (induced) oscillatory brain dynamics in auditory EEG.

Details

show
hide
Language(s): eng - English
 Dates: 20102011-03-15
 Publication Status: Published in print
 Pages: -
 Publishing info: -
 Table of Contents: -
 Rev. Method: -
 Identifiers: eDoc: 562459
Other: P11690
DOI: 10.1016/j.neuroimage.2010.12.020
 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: 55 (2) Sequence Number: - Start / End Page: 713 - 723 Identifier: ISSN: 1053-8119
CoNE: /journals/resource/954922650166