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Titolo:
Amplitudes and latencies of single-trial ERP's estimated by a maximum-likelihood method
Autore:
Jaskowski, P; Verleger, R;
Indirizzi:
Univ Lubeck, Dept Neurol, D-23538 Lubeck, Germany Univ Lubeck Lubeck Germany D-23538 Dept Neurol, D-23538 Lubeck, Germany Pedag Univ Bydgoszcz, Dept Psychophysiol, PL-85867 Bydgoszcz, Poland PedagUniv Bydgoszcz Bydgoszcz Poland PL-85867 L-85867 Bydgoszcz, Poland
Titolo Testata:
IEEE TRANSACTIONS ON BIOMEDICAL ENGINEERING
fascicolo: 8, volume: 46, anno: 1999,
pagine: 987 - 993
SICI:
0018-9294(199908)46:8<987:AALOSE>2.0.ZU;2-U
Fonte:
ISI
Lingua:
ENG
Soggetto:
EVENT-RELATED POTENTIALS; EVOKED-POTENTIALS; P300; VARIABILITY; COMPONENTS; WAVEFORM; STIMULI; SIGNALS;
Keywords:
event-related EEG potentials; maximal likelihood estimation; single-trial analysis;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Life Sciences
Engineering, Computing & Technology
Citazioni:
37
Recensione:
Indirizzi per estratti:
Indirizzo: Jaskowski, P Univ Lubeck, Dept Neurol, D-23538 Lubeck, Germany Univ Lubeck Lubeck Germany D-23538 D-23538 Lubeck, Germany
Citazione:
P. Jaskowski e R. Verleger, "Amplitudes and latencies of single-trial ERP's estimated by a maximum-likelihood method", IEEE BIOMED, 46(8), 1999, pp. 987-993

Abstract

The common approach in research on event-related electroencephalogram (EEG) potentials is to assume that the trigger-related signal is always the same and can be extracted from EEG background activity by simple averaging. Tocheck the validity of this approach and to provide more exact results, latencies and amplitudes of components have to be estimated in single trials. Pham et al, applied a maximum-likelihood approach to solve the more generalmodel which assumes that the signal hidden in EEG background activity has the same shape and amplitude but may vary in its latency from trial to trial. Extending their method we present a solution in which amplitude variability is also allowed. The utility of the solution to estimate the P3 component in single trials was investigated both by extensive pseudoreal simulations and in an application to real data. The simulations showed some advantage of the method over two other methods (Woody's method and peak-picking) commonly used in event-related potentials research. Application to real data provided a plausible description of single-trial sequential effects on the amplitude of the P3 component.

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Documento generato il 12/08/20 alle ore 20:51:18