Ultradian, circahoral and circadian structures in endothermic vertebrates and humans

Stupfel, M; Pavely, A

doi:10.1016/0300-9629(90)90034-p

Cited by 32 publications

(17 citation statements)

References 81 publications

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“…[The last mentioned of these have also been called 'minute-order rhythms' (Corner et al, 2002Habets et al, 1987), 'super, c.q., big bursts' (Madhavan et al, 2007;Wagenaar et al, 2006a,b), or 'metastable state transitions' (Sasaki et al, 2007).] Suspected oscillations of still lower frequency, from >5 min up to $24 h, such as are known to exist the intact brain -designated as, respectively, 'tonic/phasic' (Corner, 1990;Orem, 1996;Takahara et al, 2002;Wehrle et al, 2007), 'circahoral' (Brodsky, 2006;Stupfel and Pavely, 1990), 'ultradian' (Corner, 1977;Lavie and Kripke, 1981) and 'circadian' (Dijk and von Schantz, 2005;Mirmiran et al, 1995Mirmiran et al, , 2003 rhythms -can be observed intermittently in longterm neocortical registrations from in vitro neocortex tissue (unpublished observations; also Van Pelt et al, 2004a,b;Wagenaar et al, 2006a) but seem not yet to have been systematically investigated. Fluctuations on the order of several hours have been noted for spontaneous motility in amphibian tadpoles (see Corner, 1977), so that this intermediate periodicity range between an hour ('circahoralian': see Brodsky, 2006) and a day ('circadian') deserves closer investigation.…”

Section: Methodology For Single Channel Time-series Analysismentioning

confidence: 97%

Physiological consequences of selective suppression of synaptic transmission in developing cerebral cortical networks in vitro: Differential effects on intrinsically generated bioelectric discharges in a living ‘model’ system for slow-wave sleep activity

Corner¹,

Baker²,

Pelt³

2008

Neuroscience & Biobehavioral Reviews

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Section: Methodology For Single Channel Time-series Analysismentioning

confidence: 97%

Physiological consequences of selective suppression of synaptic transmission in developing cerebral cortical networks in vitro: Differential effects on intrinsically generated bioelectric discharges in a living ‘model’ system for slow-wave sleep activity

Corner¹,

Baker²,

Pelt³

2008

Neuroscience & Biobehavioral Reviews

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“…Environmental and analysis ''noise'' may also obscure low-amplitude rhythms. (54) It has been known for a number of years that circadian clocks can be entrained by ultradian feeding requirements independently of the suprachiasmatic nucleus (SCN). (55) Recently, by monitoring respiration of mice continuously, the independence of light and feeding entrainment regimes was shown where subjective nocturnal and diurnal activity could be swapped; (56) however, no changes in ultradian rhythms or the central suprachiasmatic circadian clock were observed.…”

Section: Introductionmentioning

confidence: 99%

Redox rhythmicity: clocks at the core of temporal coherence

Lloyd

Murray

2007

BioEssays

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Ultradian rhythms are those that cycle many times in a day and are therefore measured in hours, minutes, seconds or even fractions of a second. In yeasts and protists, a temperature-compensated clock with a period of about an hour (30-90 minutes) provides the time base upon which all central processes are synchronized. A 40-minute clock in yeast times metabolic, respiratory and transcriptional processes, and controls cell division cycle progression. This system has at its core a redox cycle involving NAD(P)H and dithiol-disulfide interconversions. It provides an archetype for biological time keeping on longer time scales (e.g. the daily cycles driven by circadian clocks) and underpins these rhythms, which cannot be understood in isolation. Ultradian rhythms are the foundation upon which the coherent functioning of the organism depends.

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“…Although aperiodic in the strictest sense, such events are classified as rhythms, along with circadian (approximately 24 hour) and infradian (>24 hour) rhythms (Aschoff and Pohl, 1970; Lavie, 1985, 1991; Lloyd and Stupfel, 1991). Variables that exhibit ultradian rhythmicity in rats include behavioral activity, arterial pressure (AP) and heart rate (HR), as well as brown adipose tissue (BAT), body and brain temperatures and metabolic rate (Aschoff and Pohl, 1970; Honma and Hiroshige, 1978; Shimada and Marsh, 1979; Livnat et al, 1984; Alfödi et al, 1990; Stupfel and Pavely, 1990; Lloyd and Stupfel, 1991; Franken et al, 1992a; Closa et al, 1993; Holstein-Rathlou et al, 1995; Lu et al, 2001; Heldmaier et al, 2004; Baker et al, 2005; Lloyd and Rossi, 2008). The amplitude of the episodic increases in autonomic variables is substantial.…”

mentioning

confidence: 99%

Brown adipose tissue thermogenesis heats brain and body as part of the brain-coordinated ultradian basic rest-activity cycle

et al. 2009

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Brown adipose tissue (BAT), body and brain temperatures, as well as behavioral activity, arterial pressure and heart rate, increase episodically during the waking (dark) phase of the circadian cycle in rats. Phase-linking of combinations of these ultradian (<24 hour) events has previously been noted, but no synthesis of their overall interrelationships has emerged. We hypothesized that they are coordinated by brain central command, and that BAT thermogenesis, itself controlled by the brain, contributes to increases in brain and body temperature. We used chronically implanted instruments to measure combinations of BAT, brain and body temperatures, behavioral activity, tail artery blood flow, and arterial pressure and heart rate, in conscious freely moving Sprague-Dawley rats during the 12 hour dark active period. Ambient temperature was kept constant for any particular 24 hour day, varying between 22°C and 27°C on different days. Increases in BAT temperature (≥0.5°C) occurred in an irregular episodic manner every 94±43 min (mean±SD). Varying the temperature over a wider range (18-30°C) on different days did not change the periodicity, and neither body nor brain temperature fell before BAT temperature episodic increases. These increases are thus unlikely to reflect thermoregulatory homeostasis. Episodic BAT thermogenesis still occurred in food-deprived rats. Behavioral activity, arterial pressure (18±5 mmHg every 98±49 min) and heart rate (86±31 beats/min) increased approximately 3 min before each increase in BAT temperature. Increases in BAT temperature (1.1±0.4°C) were larger than corresponding increases in brain (0.8±0.4°C) and body (0.6±0.3°C) temperature and the BAT episodes commenced 2-3 min before body and brain episodes, suggesting that BAT thermogenesis warms body and brain. Hippocampal 5-8 Hz theta rhythm, indicating active engagement with the environment, increased before the behavioral and autonomic events, suggesting coordination by brain central command as part of the 1-2 hour ultradian basic rest-activity cycle (BRAC) proposed by Kleitman.

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Ultradian, circahoral and circadian structures in endothermic vertebrates and humans

Cited by 32 publications

References 81 publications

Physiological consequences of selective suppression of synaptic transmission in developing cerebral cortical networks in vitro: Differential effects on intrinsically generated bioelectric discharges in a living ‘model’ system for slow-wave sleep activity

Physiological consequences of selective suppression of synaptic transmission in developing cerebral cortical networks in vitro: Differential effects on intrinsically generated bioelectric discharges in a living ‘model’ system for slow-wave sleep activity

Redox rhythmicity: clocks at the core of temporal coherence

Brown adipose tissue thermogenesis heats brain and body as part of the brain-coordinated ultradian basic rest-activity cycle

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