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Titolo:
Gamma band activity in an auditory oddball paradigm studied with the wavelet transform
Autore:
Gurtubay, IG; Alegre, M; Labarga, A; Malanda, A; Iriarte, J; Artieda, J;
Indirizzi:
Univ Navarra, Fac Med, Dept Neurol, Clin Neurophysiol Unit, E-31080 Pamplona, Spain Univ Navarra Pamplona Spain E-31080 hysiol Unit, E-31080 Pamplona, Spain Univ Publ Navarra, Dept Elect Engn, Pamplona, Spain Univ Publ Navarra Pamplona Spain arra, Dept Elect Engn, Pamplona, Spain
Titolo Testata:
CLINICAL NEUROPHYSIOLOGY
fascicolo: 7, volume: 112, anno: 2001,
pagine: 1219 - 1228
SICI:
1388-2457(200107)112:7<1219:GBAIAA>2.0.ZU;2-J
Fonte:
ISI
Lingua:
ENG
Soggetto:
40 HZ-EEG; EVENT-RELATED POTENTIALS; TIME-FREQUENCY ANALYSIS; ALPHA-OSCILLATIONS; COGNITIVE-PROCESSES; 40-HZ OSCILLATIONS; RANGE ACTIVITY; PHASE-LOCKING; RESPONSES; TASK;
Keywords:
event-related potentials; gamma band response; oscillatory brain potentials; P300 wave; time-frequency analysis; wavelet transform;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Life Sciences
Citazioni:
71
Recensione:
Indirizzi per estratti:
Indirizzo: Artieda, J Univ Navarra Clin, Dept Neurol & Neurocirugia, S Neurofisiol Clin, Apdo 4209, Pamplona 31008, Spain Univ Navarra Clin Apdo 4209 Pamplona Spain 31008 31008, Spain
Citazione:
I.G. Gurtubay et al., "Gamma band activity in an auditory oddball paradigm studied with the wavelet transform", CLIN NEU, 112(7), 2001, pp. 1219-1228

Abstract

Objectives: To examine the characteristics of evoked and induced gamma band oscillatory responses occurring during P300 development in an auditory oddball paradigm. Methods: A time-frequency analysis method was applied to an auditory oddball paradigm in 7 healthy subjects. This method combines a multiresolution wavelet algorithm for signal extraction and the Gabor transform to representthe temporal evolution of the selected frequency components. Phase-locked or evoked activity and also non-phase-locked activity were computed for both standard and target stimuli. Results: The gamma band frequency components differed between target and non-target stimuli processing. The study showed an early and mainly phase-locked oscillatory response appearing around 26-28 ms after both standard andtarget stimuli onset, This response showed a spectral peak around 44 Hz for both stimuli. A late oscillatory activity peaking at 37 Hz with a latencyaround 360 ms was observed appearing only fur target stimuli. The latency of this late oscillatory activity had a high correlation (P = 0.002) to thelatency of the P300 wave. Conclusions: EEC signal analysis with wavelet transform allows the identification of an early oscillatory cortical response in the gamma frequency range, as well as a late P300-related response. (C) 2001 Elsevier Science Ireland Ltd. All rights reserved.

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Documento generato il 21/09/20 alle ore 16:19:22