title: Non-linear dynamics in the beat-to-beat variability of sympathetic activity in decerebrate cats.
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 Poincaré 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.
authors.affiliation: Dipartimento di Elettronica per l'Automazione, Università di Brescia, Italia.
authors.forename: A
authors.initials: A
authors.lastname: Porta
authors.forename: G
authors.initials: G
authors.lastname: Baselli
authors.forename: N
authors.initials: N
authors.lastname: Montano
authors.forename: T
authors.initials: T
authors.lastname: Gnecchi-Ruscone
authors.forename: F
authors.initials: F
authors.lastname: Lombardi
authors.forename: A
authors.initials: A
authors.lastname: Malliani
authors.forename: S
authors.initials: S
authors.lastname: Cerutti
mesh_terms: D000818:Animals; D002415:Cats; D003655:Decerebrate State / Q000503:physiopathology*; D004562:Electrocardiography; D017711:Nonlinear Dynamics; D012815:Signal Processing, Computer-Assisted; D013564:Sympathetic Nervous System / Q000503:physiopathology*