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A dynamical analysis of oscillatory responses in the optic tectum / Sergio NEUENSCHWANDER in Cognitive Brain Research, 1-3 (October 1993)

Titre :	A dynamical analysis of oscillatory responses in the optic tectum
Type de document :	Texte imprimé et/ou numérique
Auteurs :	Sergio NEUENSCHWANDER, Auteur ; Jacques MARTINERIE, Auteur ; Bernard RENAULT, Auteur ; Fransisco J. VARELA, Auteur
Année de publication :	1993
Article en page(s) :	p.175-181
Langues :	Anglais (eng)
Mots-clés :	Optic-tectum Oscillatory-response Local-field-potential Correlation-dimension Non-linear-forecasting
Index. décimale :	PER Périodiques
Résumé :	Multi-unit recordings from the optic tectum of an awake pigeon displaying oscillatory behavior evoked by visual stimulus are highly non-stationary and contain a broad band of frequencies under a time-window analysis. Here we extend these observations by a non-linear dynamical analysis of these oscillatory signals (local fields potentials) in successive epochs during background activity and visual responses. Two numerical estimates have been obtained from the original data every 200 ms: (1) correlation dimension and (2) non-linear forecasting of the trajectories. Results from eight different recording sites analyzed are consistent and indicate, in the average, an increase in complexity of the signal during the oscillatory periods.
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