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Titolo:
BI-HEMISPHERIC STUDY OF SINGLE TRIAL MEG SIGNALS OF THE HUMAN AUDITORY-CORTEX
Autore:
LIU LC; IOANNIDES AA; MULLERGARTNER HW;
Indirizzi:
RES CTR JULICH,INST MED D-52425 JULICH GERMANY RES CTR JULICH,INST MED D-52425 JULICH GERMANY OPEN UNIV,DEPT PHYS MILTON KEYNES MK7 6AA BUCKS ENGLAND
Titolo Testata:
Electroencephalography and clinical neurophysiology
fascicolo: 1, volume: 106, anno: 1998,
pagine: 64 - 78
SICI:
0013-4694(1998)106:1<64:BSOSTM>2.0.ZU;2-4
Fonte:
ISI
Lingua:
ENG
Soggetto:
EVENT-RELATED POTENTIALS; EVOKED MAGNETIC-FIELDS; EEG COHERENCE; RHYTHM;
Keywords:
HUMAN AUDITORY CORTEX; MAGNETOENCEPHALOGRAPHY; SINGLE TRIAL ANALYSIS; INTER-HEMISPHERIC BINDING; MAGNETIC FIELD TOMOGRAPHY;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Science Citation Index Expanded
Science Citation Index Expanded
Citazioni:
38
Recensione:
Indirizzi per estratti:
Citazione:
L.C. Liu et al., "BI-HEMISPHERIC STUDY OF SINGLE TRIAL MEG SIGNALS OF THE HUMAN AUDITORY-CORTEX", Electroencephalography and clinical neurophysiology, 106(1), 1998, pp. 64-78

Abstract

Auditory evoked magnetic fields were recorded from 5 human subjects, simultaneously over each hemisphere, using the BTi twin MAGNES system (2 x 35 channel). Accurate placing of each probe and the use of optimally designed linear sums of signals allow the estimation of the millisecond by millisecond history of activation of the complex of generators responsible for the M100 response in each single trial. Thus it can be shown in much greater detail than any study so far. how the averagesignal around the M100 period is built up by events in single trials. We found consistent features across subjects, defining a dynamic baseline from which the stimulus related activity can be differentiated. Our analysis indicates that prior to the stimulus onset the activity ineach auditory cortex proceeds more or less independently. The onset of the stimulus establishes a binding of activity in the two hemispheres, probably through a common input. The coordinated activity is well described by an exponentially saturating function with a characteristictime constant in the 'magic' 15-30 ms range. (C) 1998 Elsevier Science Ireland Ltd.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 22/01/20 alle ore 07:19:11