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  • 1
    Electronic Resource
    Electronic Resource
    Circadian control of body temperature
    Amsterdam : Elsevier
    Journal of Thermal Biology 8 (1983), S. 143-147 
    Details
    ISSN: 0306-4565
    Keywords: Circadian rhythms ; conductance ; effector mechanisms ; heat loss ; heat production ; rectal temperature ; set point rhythm ; sleep-wake cycle
    Source: Elsevier Journal Backfiles on ScienceDirect 1907 - 2002
    Topics: Biology
    Type of Medium: Electronic Resource
    URL: http://linkinghub.elsevier.com/retrieve/pii/0306-4565(83)90094-3
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    Paper (German National Licenses)
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  • 2
    Electronic Resource
    Electronic Resource
    Über Reproduzierbarkeit circadianer Rhythmen beim Menschen (1980)
    Springer
    Journal of molecular medicine 58 (1980), S. 323-335 
    Details
    ISSN: 1432-1440
    Keywords: Circadian rhythms ; Circadian pattern ; Reproducibility ; Circadiane Rhythmen ; Muster der Tagesgänge ; Reproduzierbarkeit
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Description / Table of Contents: Zusammenfassung An Hand eigener experimenteller Daten und nach Angaben in der Literatur wird die Reproduzierbarkeit tagesperiodisch variierender Funktionen — des ‚circadianen Musters‘ — in fünf Sektionen geprüft. Sie betreffen das Problem der intraund interindividuellen Variabilität, dargestellt am Gang der Kerntemperatur, die Abhängigkeit des Musters von den Versuchsbedingungen, und als weitere Beispiele Tagesgänge im endokrinen System und bei verschiedenen Blutbestandteilen, im Blutdruck und in der psychomotorischen Leistung. Die Übersicht ist als Beitrag gedacht zu der Frage, welche Bedeutung der circadianen Zeitstruktur zukommt für die Bestimmung von Referenzwerten und somit auch für die Diagnostik.
    Notes: Summary On the basis of our own experimental data and those from the literature, the reproducibility of day-night variations in physiological functions — their ‘circadian pattern’ — is examined in five sections. They concern the problem of intra- and interindividual variability, demonstrated by the rhythm of deep body temperature, the dependence of the pattern on experimental conditions, and as further examples circadian rhythms in the endocrine system, in blood constituents, in blood pressure and in psychomotor performance. The survey is considered to contribute to the question of how important the circadian temporal structure may be in the search for reference values and hence in diagnosis.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01477275
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    Paper (German National Licenses)
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  • 3
    Electronic Resource
    Electronic Resource
    Circadiane Rhythmen im endocrinen System (1978)
    Springer
    Journal of molecular medicine 56 (1978), S. 425-435 
    Details
    ISSN: 1432-1440
    Keywords: Circadian rhythms ; Hormones ; Sleepwake cycle ; Circadiane Rhythmen ; Hormone ; Schlaf-Wach-Rhythmus
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Description / Table of Contents: Zusammenfassung Die Arbeit bringt in vier Teilen eine Übersicht über die Tagesgänge von Cortisol, Wachstumshormon, Prolactin, Testosteron, LH und FSH im Plasma des Menschen. 1) Versuche mit isolierten Versuchspersonen zeigen, daß dem Tagesgang des Cortisols ein endogen-circadianer Rhythmus zugrunde liegt, der unabhängig vom Schlaf-Wach-Rhythmus verlaufen kann. 2) Die von jeweils mehreren Autorengruppen in guter Übereinstimmung ermittelten Tagesgänge erlauben eine Reihung von Hormonen mit starker circadianer Komponente (z.B. Cortisol) zu solchen mit schwächerer (Testosteron) oder fehlender circadianer Komponente (FSH). 3) Der Schlaf-Wach-Rhythmus beeinflußt (mehr oder minder) die Phase der Hormon-Rhythmen; beim Vergleich mehrerer Tagesgänge ist deshalb der Bezug auf die Schlafzeiten dem auf Ortszeit vorzuziehen. 4) Die Tagesgänge von Cortisol und Wachstumshormon des Menschen stimmen befriedigend mit denen anderer Vertebraten-Arten überein.
    Notes: Summary In four sections, the contribution reviews data on 24-hour variations of cortisol, growth hormone, prolactine, testosterone, LH and FSH in the human plasma. 1) Experiments on isolated subjects show that the 24-h variation of cortisol is based on an endogenous circadian rhythm which can be independent from the rhythm of sleep and wakefulness. 2) The various pattern each of which has been described in good correspondence by several groups of authors, suggest a series of hormones with a strong circadian component (e.g. cortisol) to those with a weaker (testosterone) or even without a circadian component (FSH). 3) The sleep-wake-cycle influences the phase of hormone rhythms by various degrees; therefore, a uniform reference to sleep time seems preferable to a reference to local time in order to compare several rhythms. 4) The rhythms of cortisol and growth hormone as described in man agree satisfactorily with those in other vertebrate species.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01477056
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  • 4
    Electronic Resource
    Electronic Resource
    Interdependence between locomotor activity and duration of wakefulness in humans during isolation (1990)
    Springer
    Cellular and molecular life sciences 46 (1990), S. 870-871 
    Details
    ISSN: 1420-9071
    Keywords: Circadian rhythms ; activity ; wakefulness ; humans ; homeostatic control ; isolation
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Notes: Summary Locomotor activity was recorded in 14 subjects who lived singly in an isolation unit for 16 to 88 days. Their free-running circadian rhythms had a mean period of 25.9 h, with individual means in the duration of wakefulness (α) ranging from 12.1 to 22.9 h. Intraindividually, the hourly means of activity were negatively correlated with α to such a degree that the total amount of activity per ‘day’ remained constant irrespective of large variations in α.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01935542
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    Paper (German National Licenses)
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  • 5
    Electronic Resource
    Electronic Resource
    The dependence of onset and duration of sleep on the circadian rhythm of rectal temperature (1981)
    Springer
    Pflügers Archiv 391 (1981), S. 314-318 
    Details
    ISSN: 1432-2013
    Keywords: Circadian rhythms ; Sleep ; Body temperature ; Internal phase-relationship
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Abstract The sleep-wake cycle and the circadian rhythm of rectal temperature were recorded in subjects who lived singly in an isolation unit. In 10 subjects, the freerunning rhythms remained internally synchronized, 10 other subjects showed internal desynchronization. Times of onset and end of bedrest (“sleep”) were determined in each cycle and referred to the phase of the temperature rhythm. In the synchronized subjects, onset of sleep occurred, on the average, 1.34 h before the minimum of temperature, and end of sleep 6.94 h thereafter, with narrow distributions. The desynchronized subjects had a broad bimodal distribution of sleep onsets (peaks 6.3 and 1.3 h before the minimum); the duration of sleep varied between more than 15 h when sleep began about 10 h before the temperature minimum, and less than 4 h when sleep began several hours after the minimum. The dependence of sleep duration on body temperature is interpreted as a continuing action of the coupling forces between the two rhythms after mutual synchronization is lost.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00581514
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    Paper (German National Licenses)
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