Article (Scientific journals)
Cortical response variation with different sound pressure levels: a combined event-related potentials and FMRI study.
Neuner, Irene; Kawohl, Wolfram; Arrubla Martinez, Jorge Andres et al.
2014In PLoS ONE, 9 (10), p. 109216
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Keywords :
Acoustic Stimulation; Adult; Analysis of Variance; Auditory Perception; Brain Mapping/methods; Electroencephalography; Evoked Potentials, Auditory; Female; Humans; Limbic System/physiology; Magnetic Resonance Imaging; Male
Abstract :
[en] INTRODUCTION: Simultaneous recording of electroencephalography (EEG) and functional magnetic resonance imaging (fMRI) provides high spatial and temporal resolution. In this study we combined EEG and fMRI to investigate the structures involved in the processing of different sound pressure levels (SPLs). METHODS: EEG data were recorded simultaneously with fMRI from 16 healthy volunteers using MR compatible devices at 3 T. Tones with different SPLs were delivered to the volunteers and the N1/P2 amplitudes were included as covariates in the fMRI data analysis in order to compare the structures activated with high and low SPLs. Analysis of variance (ANOVA) and ROI analysis were also performed. Additionally, source localisation analysis was performed on the EEG data. RESULTS: The integration of averaged ERP parameters into the fMRI analysis showed an extended map of areas exhibiting covariation with the BOLD signal related to the auditory stimuli. The ANOVA and ROI analyses also revealed additional brain areas other than the primary auditory cortex (PAC) which were active with the auditory stimulation at different SPLs. The source localisation analyses showed additional sources apart from the PAC which were active with the high SPLs. DISCUSSION: The PAC and the insula play an important role in the processing of different SPLs. In the fMRI analysis, additional activation was found in the anterior cingulate cortex, opercular and orbito-frontal cortices with high SPLs. A strong response of the visual cortex was also found with the high SPLs, suggesting the presence of cross-modal effects.
Disciplines :
Radiology, nuclear medicine & imaging
Author, co-author :
Neuner, Irene
Kawohl, Wolfram
Arrubla Martinez, Jorge Andres ;  Université de Liège - ULiège > Doct. sc. bioméd. & pharma. (Bologne)
Warbrick, Tracy
Hitz, Konrad
Wyss, Christine
Boers, Frank
Shah, N. Jon
Language :
English
Title :
Cortical response variation with different sound pressure levels: a combined event-related potentials and FMRI study.
Publication date :
2014
Journal title :
PLoS ONE
eISSN :
1932-6203
Publisher :
Public Library of Science, United States - California
Volume :
9
Issue :
10
Pages :
e109216
Peer reviewed :
Peer Reviewed verified by ORBi
Available on ORBi :
since 07 February 2017

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