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Titolo:
REPLICABILITY OF MEG AND EEG MEASURES OF THE AUDITORY N1 N1M-RESPONSE/
Autore:
VIRTANEN J; AHVENINEN J; ILMONIEMI RJ; NAATANEN R; PEKKONEN E;
Indirizzi:
UNIV HELSINKI,CENT HOSP,MED ENGN CTR,BIOMAG LAB,POB 508 FIN-00029 HYSK FINLAND UNIV HELSINKI,DEPT PSYCHOL,COGNIT BRAIN RES UNIT FIN-00014 HELSINKI FINLAND UNIV HELSINKI,CENT HOSP,MED ENGN CTR,BIOMAG LAB FIN-00029 HYSK FINLAND UNIV HELSINKI,CENT HOSP,DEPT RADIOL FIN-00029 HYSK FINLAND UNIV HELSINKI,CENT HOSP,DEPT NEUROL FIN-00029 HYSK FINLAND
Titolo Testata:
Electroencephalography and clinical neurophysiology. Evoked potentials
fascicolo: 3, volume: 108, anno: 1998,
pagine: 291 - 298
SICI:
0168-5597(1998)108:3<291:ROMAEM>2.0.ZU;2-3
Fonte:
ISI
Lingua:
ENG
Soggetto:
HUMAN-BRAIN; MAGNETIC-FIELDS; LOCALIZATION; POTENTIALS;
Keywords:
ELECTROENCEPHALOGRAPHY (EEG); MAGNETOENCEPHALOGRAPHY (MEG); N1; N1M; REPLICABILITY; SOURCE LOCALIZATION;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Science Citation Index Expanded
Science Citation Index Expanded
Citazioni:
18
Recensione:
Indirizzi per estratti:
Citazione:
J. Virtanen et al., "REPLICABILITY OF MEG AND EEG MEASURES OF THE AUDITORY N1 N1M-RESPONSE/", Electroencephalography and clinical neurophysiology. Evoked potentials, 108(3), 1998, pp. 291-298

Abstract

We investigated the replicability of the source location, amplitude and latency measures of the auditory evoked N1 (EEG) and Nlm (MEG) responses. Each of the 5 subjects was measured 6 times in two recording sessions. Responses to monaural stimuli were recorded from 122 MEG and 64 EEG channels simultaneously. The EEG data were modeled with a symmetrically-located dipole pair. For the MEG data, one dipole in each hemisphere was located independently using a subset of channels. Standard deviation (SD) was used as a measure for replicability. The average SDof the x, y and z coordinates of the contralateral Nlm dipole was about 2 mm, whereas the corresponding figures for the ipsilateral Nlm andthe contra-and ipsilateral N1 were about twice as large. The SDs of the dipole amplitudes and latencies were almost equal with MEG and EEG. The amplitude and latency measures of the MEG field gradient waveforms were almost as replicable as those of the dipole models. The resultssuggest that both MEG and EEG can be used for investigating the simultaneous activity of the left and right auditory cortices independently, MEG being superior in certain experimental setups. (C) 1998 ElsevierScience Ireland Ltd.

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Documento generato il 02/04/20 alle ore 02:57:28