Brandenberger G. Endocrine ultradian rhythms during sleep and wakefulness. In Lloyd D, Ross EC, eds. Ultradian rhythm in life processes. London: Springer-Verlag, 1992, pp. 123-38.Brandenberger, G. (1992). Endocrine ultradian rhythms during sleep and wakefulness. In D. Lloyd & E. Rossi ...
A biological rhythm is called ultradian if its period is shorter than 24 hour. Ultradian rhythms have been observed in physiological functions, like cellular processes, respiraton, circulation, hormonal release and sleep stages, as well as in behavioral functions, often related to feeding patterns. ...
This rhythm is composed of the synchronous activity of a number of different processes including occulomotor activity, muscle tone, dominance of the autonomic nervous system, brain electrical activity, and energy utilization. Similar to many other biological processes, sleep shows rhythmicity at multiple...
ultradian rhythmpulsatilitySleep and circadian rhythmicity both influence the 24-h profiles of the main pituitary and adrenal hormones. From studies using experimental strategies including complete and partial sleep deprivation, acute and chronic shifts in the sleep period, or complete sleep-wake reversal...
PJ-878 The Estimation of Sleep Quality in Patients with Cardiac Dysfunction Using Ultradian Rhythm of Heart Rate Variability(Heart failure, clinical(21)(M),Poster Session(Japanese),The 72nd Annual Scientific Meeting of the Japanese Circulation Society) Takagawa Junya , Asanoi Hidetsugu , Ueno Hirosh...
Ultradian rhythminsulinglucoseplasma renin activityACTH cortisolmealsleepIn this study, we analyse the temporal organization within the 24h period of three different endocrine systems, reninangiotensin, insulin and glucose, ACTH and cortisol, which display similar cycles with a period of about 100 min,...
The mechanisms underlying the mammalian ultradian sleep rhythm—the alternation of rapid-eye-movement (REM) and slow-wave (SW) states—are not well understood but probably depend, at least in part, on circuits in the brainstem. Here, we use perturbation experiments to probe this ultradian rhythm...
onset in 100% of individuals. Together, the present findings reveal fluctuations in distal body temperature and heart rate variability that consistently anticipate the LH surge, suggesting that automated ultradian rhythm monitoring may provide a novel and convenient method for non-invasive fertility ...
Sleep StagesCircadian RhythmSleep, REMPhosphorus 31 magnetic resonance spectroscopy (P-31 MRS) was used to study noninvasively the intracellular free Mg2+ concentration and cellular bioenergetic state of rat brain in vivo before and after fluid percussion-induced traumatic brain injury of graded ...
Background: Ultradian alternating cerebral hemispheric dominance rhythms are observed using EEG during both waking and sleep, and with waking cognition. The question of whether this cerebral rhythm is coupled to the REM–NREM sleep cycle and the basic rest–activity cycle (BRAC) deserves attention. ...