English
 
User Manual Privacy Policy Disclaimer Contact us
  Advanced SearchBrowse

Item

ITEM ACTIONSEXPORT
  Auditory cortical responses in hearing subjects and unilateral deaf patients as detected by functional magnetic resonance imaging

Scheffler, K., Bilecen, D., Schmid, N., Tschopp, K., & Seelig, J. (1998). Auditory cortical responses in hearing subjects and unilateral deaf patients as detected by functional magnetic resonance imaging. Cerebral Cortex, 8(2), 156-163. doi:10.1093/cercor/8.2.156.

Item is

Basic

show hide
Item Permalink: http://hdl.handle.net/11858/00-001M-0000-0013-E8B1-4 Version Permalink: http://hdl.handle.net/21.11116/0000-0005-D65E-1
Genre: Journal Article

Files

show Files

Locators

show

Creators

show
hide
 Creators:
Scheffler, K1, Author              
Bilecen, D, Author
Schmid, N, Author
Tschopp, K, Author
Seelig, J, Author
Affiliations:
1External Organizations, ou_persistent22              

Content

show
hide
Free keywords: -
 Abstract: Functional magnetic resonance imaging is a non-invasive method for the detection of focal brain activity at high spatial resolution. Acoustic stimulation leads to a blood oxygenation level dependent signal change in the plane of the superior temporal gyrus. The dependence of this response in the auditory cortex on binaural, monaural left and monaural right acoustic stimulation for 10 healthy subjects and five monaural deaf patients is described. Acoustic stimulation consists of 1000 Hz pulsed sine tones at a pulse rate of 6 Hz and a sound pressure level of 95 dB. For monaural stimulation, normal-hearing subjects revealed a strong lateralization of cortical response towards the contralateral hemisphere. The lateralization ratios between left and right hemispheric response areas were 3.4-5.2 for monaural stimulation and nearly balanced for binaural stimulation. Additionally, the sum of cortical activation volumes induced by monaural left and right stimulation was approximately 30 smaller than for binaural stimulation, indicating either inhibitory mechanisms or neuronal facilitation within the auditory pathways. For monaural deaf subjects the lateralization ratio between left to right response was just 1.3 towards the contralateral hemisphere of the healthy ear, which is comparable to binaural responses of normal-hearing subjects. This observation seems to indicate a plasticity or a reorganization of auditory pathways of monaural deaf patients.

Details

show
hide
Language(s):
 Dates: 1998-03
 Publication Status: Published in print
 Pages: -
 Publishing info: -
 Table of Contents: -
 Rev. Type: -
 Identifiers: DOI: 10.1093/cercor/8.2.156
BibTex Citekey: SchefflerBSTS1998
 Degree: -

Event

show

Legal Case

show

Project information

show

Source 1

show
hide
Title: Cerebral Cortex
Source Genre: Journal
 Creator(s):
Affiliations:
Publ. Info: New York, NY : Oxford University Press
Pages: - Volume / Issue: 8 (2) Sequence Number: - Start / End Page: 156 - 163 Identifier: ISSN: 1047-3211
CoNE: https://pure.mpg.de/cone/journals/resource/954925592440