Spectral analysis of sympathetic discharge in decerebrate cats.
To evaluate if the 0.1-Hz low-frequency oscillations of R-R interval are a reflection of rhythmical pattern of discharge of the sympathetic outflow, we analysed in 10 decerebrate cats heart rate and cardiac sympathetic efferent discharge variability. A predominant low-frequency component was present in both signals, thus suggesting that the 0.1-Hz rhythm indeed reflects a rhythmical pattern of discharge of sympathetic outflow.
Centro Ricerche Cardiovascolari CNR, Centro Fidid, Ospedale L. Sacco, Milano, Italy.
F
F
Lombardi
N
N
Montano
M L
ML
Finocchiaro
T G
TG
Ruscone
G
G
Baselli
S
S
Cerutti
A
A
Malliani
D000818:Animals; D001339:Autonomic Fibers, Preganglionic / Q000502:physiology; D001794:Blood Pressure; D002415:Cats; D003655:Decerebrate State; D004525:Efferent Pathways / Q000502:physiology; D004562:Electrocardiography; D005728:Ganglia, Sympathetic / Q000502:physiology; D006339:Heart Rate; D012119:Respiration; D013564:Sympathetic Nervous System / Q000502:physiology*