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

Cerebral Cortex
K SchefflerJ Seelig

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 contralater...Continue Reading

Citations

Dec 5, 1998·Magnetic Resonance in Medicine : Official Journal of the Society of Magnetic Resonance in Medicine·D BilecenK Scheffler
Aug 29, 2003·Journal of the Association for Research in Otolaryngology : JARO·Deepak KhoslaJuha-Pekka Vasama
Oct 24, 2012·Journal of the Association for Research in Otolaryngology : JARO·Paul M BrileyA Quentin Summerfield
Aug 22, 2008·Magma·S SchmitterL R Schad
Mar 27, 2013·Clinical Neurophysiology : Official Journal of the International Federation of Clinical Neurophysiology·Michael R D MaslinWael El-Deredy
Jan 8, 2013·Hearing Research·Yongmin Chang, Sang-Heun Lee
Jan 17, 2004·Magnetic Resonance Imaging·Francesco Di SalleErich Seifritz
Jun 30, 2009·Acta otorrinolaringológica española·Luis M Menéndez-ColinoManuel Bernal-Sprekelsen
Mar 17, 2005·Neuroreport·Vincent J SchmithorstJohn Greinwald
Aug 19, 2004·Audiology & Neuro-otology·Ken ItoKimitaka Kaga
Oct 18, 2013·BMC Veterinary Research·Jan-Peter BachIngo Nolte
May 15, 2013·PloS One·Naeem KomeilipoorPaola Cesari
Mar 27, 2001·AJR. American Journal of Roentgenology·B Bernal, N R Altman
Aug 13, 2010·Journal of the American Academy of Audiology·Richard S TylerWenjun Wang
Jun 4, 2014·The Journal of Laryngology and Otology·O SürmelioğluR Sahin
Jun 19, 2004·The International Journal of Neuroscience·Byron BernalL Santiago Medina
Sep 14, 2007·Acta Oto-laryngologica·Luis-Miguel Menéndez-ColinoManuel Bernal-Sprekelsen
Sep 14, 2007·Acta Oto-laryngologica·Thomas SteffensThomas Lenarz
Aug 29, 2012·Clinical Neurophysiology : Official Journal of the International Federation of Clinical Neurophysiology·Michael R D MaslinWael El-Deredy
Jan 1, 2008·Clinical Neurophysiology : Official Journal of the International Federation of Clinical Neurophysiology·Jemma HineStefan Debener
Mar 10, 2016·The Laryngoscope·Jolie L ChangSteven W Cheung
Apr 28, 2007·Clinical Neurophysiology : Official Journal of the International Federation of Clinical Neurophysiology·Jemma Hine, Stefan Debener
Jul 23, 2015·Journal of the Association for Research in Otolaryngology : JARO·Srikanta K MishraJai Lal Davessar
May 16, 2012·Journal of Magnetic Resonance Imaging : JMRI·Jascha ZappLothar R Schad

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