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Methods Inf Med 1994; 33(01): 89-93
DOI: 10.1055/s-0038-1634980
Original Article
Schattauer GmbH

Non-Linear Dynamics in the Beat-to-Beat Variability of Sympathetic Activity in Decerebrate Cats

A. Porta
3   Dipartimento di Elettronica per I’Automazione, Universita di Brescia, Roma, Italia
,
G. Baselli
3   Dipartimento di Elettronica per I’Automazione, Universita di Brescia, Roma, Italia
,
N. Montano
1   Medicina Interna II, Ospedale Sacco, Università di Milano, Roma, Italia
,
T. Gnecchi-Ruscone
1   Medicina Interna II, Ospedale Sacco, Università di Milano, Roma, Italia
,
F. Lombardi
1   Medicina Interna II, Ospedale Sacco, Università di Milano, Roma, Italia
,
A. Malliani
1   Medicina Interna II, Ospedale Sacco, Università di Milano, Roma, Italia
,
S. Cerutti
2   Dipartimento di Informatica e Sistemi, Università “la Sapienza”, Roma, Italia
› Author Affiliations
Further Information

Publication History

Publication Date:
08 February 2018 (online)

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Abstract:

Non-linear interactions between low-frequency rhythms (0.1 Hz) of beat-to-beat variability series of sympathetic discharge and respiratory rhythm (0.3 Hz) are observed in decerebrate artificially ventilated cats. Simple graphical tools as Poincare and recurrence maps are used to detect, in a qualitative way, phase-locking phenomena. Non-parametric bispectral analysis is also carried out to quantify the degree of second-order coupling between oscillations at different frequencies.

Keywords

Sympathetic Discharge - Ventilation Cycle - Non-linear Coupling
 

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