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Titolo:
PROCESSING VISUAL-EVOKED POTENTIALS BASED ON MATCHED FILTERING OF SINGLE TRIAL RESPONSES
Autore:
JOBERT M; KRANDA K; DUCHENE J;
Indirizzi:
PAREXEL GMBH,KLINIKUM WESTMEAD,INDEPENDENT PHARMACEUT RES ORG,HAUS 18,SPANDAUER DAMM 130 D-14050 BERLIN GERMANY FREE UNIV BERLIN,BENJAMIN FRANKLIN HOSP,DEPT CLIN PSYCHIAT,LAB CLIN PSYCHOPHYSIOL D-1000 BERLIN GERMANY
Titolo Testata:
Neuropsychobiology
fascicolo: 3, volume: 34, anno: 1996,
pagine: 166 - 174
SICI:
0302-282X(1996)34:3<166:PVPBOM>2.0.ZU;2-5
Fonte:
ISI
Lingua:
ENG
Soggetto:
PATTERN; DISCRIMINATION; EEG;
Keywords:
VISUAL EVOKED POTENTIAL; MATCHED FILTERING; SIGNAL PROCESSING; SIGNAL DETECTION THEORY; STIMULUS DETECTABILITY;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Science Citation Index Expanded
Science Citation Index Expanded
Citazioni:
33
Recensione:
Indirizzi per estratti:
Citazione:
M. Jobert et al., "PROCESSING VISUAL-EVOKED POTENTIALS BASED ON MATCHED FILTERING OF SINGLE TRIAL RESPONSES", Neuropsychobiology, 34(3), 1996, pp. 166-174

Abstract

Physiological signals recorded after presentation of a stimulus can be considered as the sum of an evoked sensory response and uncorrelatednoise corresponding to the spontaneous neural background activity. Incase of low signal-to-noise ratio, the sensory signal is estimated byaveraging a large number of single trial records sampled under the same experimental conditions. The averaging technique, however, is inappropriate for displaying trial-to-trial variations that may occur during a recording session. A method based on matched filtering was developed for processing single visual evoked potentials (VEPs). To illustrate the performance of this method, a set of VEPs for grating patches of8 different contrasts (including 0) was evaluated. The VEPs were subjected to signal detection analysis by computing for each contrast similarity indices between the single trial records and the averaged response used as a Signal processing template. The signals were analysed interms of probability density distributions, expressing the goodness of fit between template and each single waveform.

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Documento generato il 15/07/20 alle ore 08:18:45