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Titolo:
Effects of acoustic gradient noise from functional magnetic resonance imaging on auditory processing as reflected by event-related brain potentials
Autore:
Novitski, N; Alho, K; Korzyukov, O; Carlson, S; Martinkauppi, S; Escera, C; Rinne, T; Aronen, HJ; Naatanen, R;
Indirizzi:
Univ Helsinki, Cognit Brain Res Unit, Dept Psychol, FIN-00014 Helsinki, Finland Univ Helsinki Helsinki Finland FIN-00014 ol, FIN-00014 Helsinki, Finland Tampere Univ, Dept Psychol, FIN-33101 Tampere, Finland Tampere Univ Tampere Finland FIN-33101 ychol, FIN-33101 Tampere, Finland Univ Helsinki, Dept Physiol, Inst Biomed, Helsinki, Finland Univ HelsinkiHelsinki Finland Physiol, Inst Biomed, Helsinki, Finland Univ Helsinki, Cent Hosp, Dept Radiol, Helsinki, Finland Univ Helsinki Helsinki Finland ent Hosp, Dept Radiol, Helsinki, Finland Univ Barcelona, Neurodynam Lab, Dept Psychiat & Clin Psychobiol, Catalonia, Spain Univ Barcelona Catalonia Spain hiat & Clin Psychobiol, Catalonia, Spain Kuopio Univ Hosp, Dept Clin Radiol, SF-70210 Kuopio, Finland Kuopio Univ Hosp Kuopio Finland SF-70210 adiol, SF-70210 Kuopio, Finland Univ Helsinki, Cent Hosp, Biomag Lab, Med Engn Ctr, Helsinki, Finland UnivHelsinki Helsinki Finland mag Lab, Med Engn Ctr, Helsinki, Finland
Titolo Testata:
NEUROIMAGE
fascicolo: 1, volume: 14, anno: 2001,
parte:, 1
pagine: 244 - 251
SICI:
1053-8119(200107)14:1<244:EOAGNF>2.0.ZU;2-8
Fonte:
ISI
Lingua:
ENG
Soggetto:
INVOLUNTARY ATTENTION; SCANNER NOISE; ECHO-PLANAR; CORTEX; FMRI; DISCRIMINATION; ACTIVATION; NOVELTY; SOUND; MRI;
Keywords:
fMRI; MRI acoustic noise; auditory event-related potentials; novel sounds; involuntary attention; P3a; mismatch negativity;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Life Sciences
Citazioni:
35
Recensione:
Indirizzi per estratti:
Indirizzo: Novitski, N Univ Helsinki, Cognit Brain Res Unit, Dept Psychol, FIN-00014 Helsinki, Finland Univ Helsinki Helsinki Finland FIN-00014 4 Helsinki, Finland
Citazione:
N. Novitski et al., "Effects of acoustic gradient noise from functional magnetic resonance imaging on auditory processing as reflected by event-related brain potentials", NEUROIMAGE, 14(1), 2001, pp. 244-251

Abstract

The processing of sound changes and involuntary attention to them has beenwidely studied with event-related brain potentials (ERPs). Recently, functional magnetic resonance imaging (fMRI) has been applied to determine the neural mechanisms of involuntary attention and the sources of the corresponding ERP components. The gradient-coil switching noise from the MRI scanner,however, is a challenge to any experimental design using auditory stimuli. In the present study, the effects of MRI noise on: ERPs associated with preattentive processing of sound changes and involuntary switching of attention to them were investigated. Auditory stimuli consisted of frequently presented "standard" sounds, infrequent, slightly higher "deviant" sounds,: andinfrequent natural "novel" sounds. The standard and deviant sounds were either sinusoidal tones or musical chords, in separate stimulus sequences. The mismatch negativity (MMN) ERP associated with preattentive sound change detection was elicited by the deviant and novel sounds and was-not affected by the prerecorded background MRI noise tin comparison with the condition with no background noise). The succeeding positive P3a ERP responses associated with involuntary attention switching elicited by novel sounds were alsonot affected by the MRI noise. However, in ERPs to standard tones and chords, the P1, N1, and P2 peak latencies-were significantly prolonged by the MRI noise. Moreover, the amplitude of the subsequent "exogenous" N2 to the standard sounds was significantly attenuated by the presence of MRI noise, In conclusion, the present results suggest that in fMRI the background noisedoes not interfere with the imaging of auditory processing related to involuntary attention. (C) 2001 Academic Press.

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Documento generato il 09/04/20 alle ore 09:25:25