Results 251 to 260 of about 265,325 (306)
Some of the next articles are maybe not open access.
Cardiac Rhythm Control Devices
Critical Care Nursing Clinics of North America, 1994More than 110,000 men, women, and children receive permanent implanted pacemakers annually in the United States alone, and thousands more receive implantable cardioverter defibrillators; more still are treated for a brief period with temporary pacing in critical care settings.
openaire +2 more sources
CNS CONTROL OF THE CIRCADIAN ADRENOCORTICAL RHYTHM
Journal of Steroid Biochemistry, 1983The effects of various CNS impairments on the circadian rhythm of plasma ACTH and Corticosterone (C) were studied in individual cannulated female Sprague-Dawley rats. Pinealectomy had no effect whatever the light perception (intact or blinded rats).
A, Szafarczyk +5 more
openaire +2 more sources
Molecular control of circadian rhythms
Current Opinion in Genetics & Development, 1995Circadian rhythms are virtually ubiquitous in eukaryotes and have been shown to exist even in some prokaryotes. The generally accepted view is that these rhythms are generated by an endogenous clock. Recent progress, especially in the Drosophila, Neurospora and mouse systems, has revealed new clock components and mechanisms.
openaire +2 more sources
Redox control of cardiac rhythm
Biochemistry (Moscow), 2012The rhythm of cardiac beats is generated by pacemaker cells differing from other cardiomyocytes by the presence of slow diastolic depolarization. Consistently activated transmembrane ionic currents provide cyclic excitation of pacemakers, forming the original "membrane clocks".
openaire +2 more sources
Molecular control of circadian metabolic rhythms
Journal of Applied Physiology, 2009Circadian metabolic rhythms are fundamental to the control of nutrient and energy homeostasis, as well as the pathogenesis of metabolic disease, such as obesity, lipid disorders, and type 2 diabetes. This temporal organization of tissue metabolism is coordinated through reciprocal cross talk between the biological timing system and the metabolic ...
Siming, Li, Jiandie D, Lin
openaire +2 more sources
[Rhythm and metabolic control].
Herz, 2022Diabetes mellitus and atrial fibrillation show a steady increase in their prevalence. Diabetes mellitus is a relevant risk factor for the development and maintenance of atrial fibrillation, which should not be underestimated. Fluctuations in blood glucose levels occurring in diabetes, inflammatory processes and oxidative stress lead to structural ...
Denise, Guckel +2 more
openaire +1 more source
Circadian rhythms in the chemoreflex control of breathing
American Journal of Physiology-Regulatory, Integrative and Comparative Physiology, 2000Mechanisms underlying the circadian rhythm in lung ventilation were investigated. Ten healthy male subjects were studied for 36 h using a constant routine protocol to minimize potentially confounding variables. Laboratory light, humidity, and temperature remained constant, subjects did not sleep, and their meals and activities were held to a strict ...
R, Stephenson +3 more
openaire +2 more sources
Control Theoretic Views on Circadian Rhythms
2006 IEEE International Conference on Control Applications, 2006Circadian rhythms, which are observed in most of living things, e.g. bacteria, fungi, plants, and animals, are self-sustained oscillations with about 24 hours period, and have the following properties: The first property is that the oscillation is entrained by light/dark cycles; the second one is that the oscillation, especially the period of the ...
T. Takeuchi +3 more
openaire +1 more source
Heart Rhythm Control During Sleep
Psychophysiology, 1984ABSTRACTHeart rate (HR) changes during sleep were analyzed, with the aid of a minicomputer, for a group of 20 healthy subjects. In stages 1, 2, 3, and 4, HR decreased against a background of increasing respiratory arrhythmia. REM sleep was characterized by increased HR and decreased respiratory arrhythmia.
D, Zemaityte, G, Varoneckas, E, Sokolov
openaire +2 more sources
The Neuroendocrine Control of Seasonal Rhythms
2000In many parts of the world, animals are exposed to large seasonal fluctuations in environmental conditions, particularly temperature and food availability. To cope with these changes, most long-lived species that spend at least part of the year in regions where annual differences in environmental conditions are very pronounced, exhibit seasonal cycles ...
openaire +2 more sources