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Titolo:
Bisensory stimulation increases gamma-responses over multiple cortical regions
Autore:
Sakowitz, OW; Quiroga, RQ; Schurmann, M; Basar, E;
Indirizzi:
Med Univ Lubeck, Inst Physiol, D-23538 Lubeck, Germany Med Univ Lubeck Lubeck Germany D-23538 Physiol, D-23538 Lubeck, Germany Humboldt Univ, Charite, Dept Neurosurg, D-13353 Berlin, Germany Humboldt Univ Berlin Germany D-13353 Neurosurg, D-13353 Berlin, Germany KFA Julich GmbH, Forschungszentrum, John von Neumann Inst Comp, D-52425 Julich, Germany KFA Julich GmbH Julich Germany D-52425 nst Comp, D-52425 Julich, Germany Dokuz Eylul Univ, Dept Biophys, TR-35340 Izmir, Turkey Dokuz Eylul Univ Izmir Turkey TR-35340 t Biophys, TR-35340 Izmir, Turkey TUBITAK Brain Dynam Res Unit, Ankara, Turkey TUBITAK Brain Dynam Res UnitAnkara Turkey nam Res Unit, Ankara, Turkey
Titolo Testata:
COGNITIVE BRAIN RESEARCH
fascicolo: 2, volume: 11, anno: 2001,
pagine: 267 - 279
SICI:
0926-6410(200104)11:2<267:BSIGOM>2.0.ZU;2-P
Fonte:
ISI
Lingua:
ENG
Soggetto:
TIME-FREQUENCY ANALYSIS; VISUAL-EVOKED POTENTIALS; 40 HZ-EEG; WAVELET TRANSFORM; ELECTROENCEPHALOGRAM SERIES; SUPERIOR COLLICULUS; BAND RESPONSES; BRAIN ACTIVITY; PHASE-LOCKING; CORTEX;
Keywords:
association; event-related potential; gamma oscillation; multisensory; perception; wavelet;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Life Sciences
Citazioni:
92
Recensione:
Indirizzi per estratti:
Indirizzo: Sakowitz, OW Med Univ Lubeck, Inst Physiol, D-23538 Lubeck, Germany Med Univ Lubeck Lubeck Germany D-23538 3538 Lubeck, Germany
Citazione:
O.W. Sakowitz et al., "Bisensory stimulation increases gamma-responses over multiple cortical regions", COGN BRAIN, 11(2), 2001, pp. 267-279

Abstract

In the framework of the discussion about gamma (approx. 40 Hz) oscillations as information carriers in the brain, we investigated the relationship between gamma responses in the EEG and intersensory association. Auditory evoked potentials (AEPs) and visual evoked potentials (VEPs) were compared with bisensory evoked potentials (BEPs; simultaneous auditory and visual stimulation) in 15 subjects. Gamma responses in AEPs, VEPs and BEPs were assessed by means of wavelet decomposition. Overall maximum gamma-components post-stimulus were highest in BEPs (P<0.01). Bisensory evoked gamma-responses also showed significant central, parietal and occipital amplitude-increases (P<0.001, P<0.01, P<0.05, respectively; prestimulus interval as baseline). These were of greater magnitude when compared with the unisensory responses. As a correlate of the marked gamma responses to bimodal stimulation we suggest a process of 'intersensory association', i.e. one of the steps betweensensory transmission and perception. Our data may be interpreted as a further example of function-related gamma responses in the EEG. (C) 2001 Elsevier Science B.V. All rights reserved.

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Documento generato il 01/04/20 alle ore 09:42:40