Sleep and circadian influences on cardiac autonomic nervous system activity.

Content Provider	Semantic Scholar
Author	Trinder, John Kim, Young Sam Luke, David
Copyright Year	1997
Abstract	To assess the separate contributions of the sleep and circadian systems to changes in cardiac autonomic nervous system (ANS) activity, 12 supine subjects participated in two 26-h constant routines, which were counterbalanced and separated by 1 wk. One routine did not permit sleep, whereas the second allowed the subjects to sleep during their normal sleep phase. Parasympathetic nervous system activity was assessed with respiratory sinus arrhythmia as measured from the spectral analysis of cardiac beat-to-beat intervals. Sympathetic nervous system activity was primarily assessed with the preejection period as estimated from impedance cardiography, although the 0.1-Hz peak from the spectral analysis of cardiac beat-to-beat intervals, the amplitude of the T wave in the electrocardiogram, and heart rate were also measured. Respiratory sinus arrhythymia showed a 24-h rhythm independent of sleep, whereas preejection period only showed a 24-h rhythm if sleep occurred. Thus the findings indicate that parasympathetic nervous system activity is mostly influenced by the circadian system, whereas sympathetic nervous system activity is mostly influenced by the sleep system.
File Format	PDF HTM / HTML
Alternate Webpage(s)	http://ajpheart.physiology.org/content/ajpheart/273/4/H1761.full.pdf
PubMed reference number	9362241v1
Volume Number	273
Issue Number	4
Part	2
Journal	The American journal of physiology
Language	English
Access Restriction	Open
Subject Keyword	Autonomic nervous system disorders CNS disorder Cardiography, Impedance Electrocardiography Nasal sinus Nervous system structure Quantitative impedance Respiratory Distress Syndrome, Newborn Respiratory Sinus Arrhythmia cardiography nervous system disorder
Content Type	Text
Resource Type	Article