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Titolo:
Variability and interdependence of local field potentials: Effects of gainmodulation and nonstationarity
Autore:
Truccolo, WA; Ding, MZ; Bressler, SL;
Indirizzi:
Florida Atlantic Univ, Ctr Complex Syst & Brain Sci, Boca Raton, FL 33431 USA Florida Atlantic Univ Boca Raton FL USA 33431 i, Boca Raton, FL 33431 USA
Titolo Testata:
NEUROCOMPUTING
, volume: 38, anno: 2001,
pagine: 983 - 992
SICI:
0925-2312(200106)38:<983:VAIOLF>2.0.ZU;2-U
Fonte:
ISI
Lingua:
ENG
Keywords:
variability; event-related potential; cross-correlation; coherence; functional connectivity;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Engineering, Computing & Technology
Citazioni:
12
Recensione:
Indirizzi per estratti:
Indirizzo: Truccolo, WA Florida Atlantic Univ, Ctr Complex Syst & Brain Sci, 777 Glades Rd, Boca Raton, FL 33431 USA Florida Atlantic Univ 777 Glades Rd Boca Raton FL USA 33431 A
Citazione:
W.A. Truccolo et al., "Variability and interdependence of local field potentials: Effects of gainmodulation and nonstationarity", NEUROCOMPUT, 38, 2001, pp. 983-992

Abstract

Cortical potentials following sensory stimulation are widely analyzed as the linear combination of an invariant evoked response component, time-locked to the stimulus, and an independent, ongoing noise component. We considertwo alternative models and compare their predictions with data. In the first model, neuronal populations coupled through nonlinear sigmoid functions have their effective connectivity modulated by the evoked response. This leads to fast changes in the ongoing activity measured by ensemble variance, cross-correlation, spectral power, or coherence time functions. In the second model, trial-to-trial amplitude variability of a stereotyped evoked response leads to similar modulation in ongoing activity. Specific predictions from both models are tested against local field potentials recorded intracortically from monkeys performing a visuomotor task. (C) 2001 Elsevier Science B.V. All rights reserved.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 09/04/20 alle ore 00:22:11