scholarly journals Effects of Different Light Intensities during the Daytime on Circadian Rhythm of Core Temperature in Humans.

1998 ◽  
Vol 17 (6) ◽  
pp. 253-257 ◽  
Author(s):  
Shin-Jung Park ◽  
Hiromi Tokura
Keyword(s):  
Circadian Rhythm ◽  
Core Temperature ◽  
Light Intensities

Core temperature circadian rhythm across aging in Spontaneously Hypertensive Rats

2021 ◽  
Vol 97 ◽  
pp. 102807
Author(s):  
Leonardo M.T. de Rezende ◽  
Leandro C. Brito ◽  
Anselmo G. Moura ◽  
Alexandre J.L.D. Costa ◽  
Tiago F. Leal ◽  
...  
Keyword(s):  
Circadian Rhythm ◽  
Core Temperature ◽  
Spontaneously Hypertensive Rats ◽  
Hypertensive Rats ◽  
Spontaneously Hypertensive

Circadian rhythm changes in core temperature over the menstrual cycle: method for noninvasive monitoring

2000 ◽  
Vol 279 (4) ◽  
pp. R1316-R1320 ◽  
Author(s):  
Mary D. Coyne ◽  
Christina M. Kesick ◽  
Tammy J. Doherty ◽  
Margaret A. Kolka ◽  
Lou A. Stephenson
Keyword(s):  
Circadian Rhythm ◽  
Menstrual Cycle ◽  
Core Temperature ◽  
Temperature Sensor ◽  
Temperature Sensors ◽  
Cycle Phase ◽  
Noninvasive Method ◽  
Menstrual Cycle Phase ◽  
Cosinor Analysis ◽  
Temperature Amplitude

The purpose of this study was to determine whether core temperature (Tc) telemetry could be used in ambulatory women to track changes in the circadian Tc rhythm during different phases of the menstrual cycle and, more specifically, to detect impending ovulation. Tcwas measured in four women who ingested a series of disposable temperature sensors. Data were collected each minute for 2–7 days and analyzed in 36-h segments by automated cosinor analysis to determine the mesor (mean temperature), amplitude, period, acrophase (time of peak temperature), and predicted circadian minimum core temperature (Tc-min) for each cycle. The Tcmesor was higher ( P ≤ 0.001) in the luteal (L) phase (37.39 ±0.13°C) and lower in the preovulatory (P) phase (36.91 ±0.11°C) compared with the follicular (F) phase (37.08 ±0.13°C). The predicted Tc-min was also greater in L (37.06 ± 0.14°C) than in menses (M; 36.69 ± 0.13°C), F (36.6 ± 0.16°C), and P (36.38 ± 0.08°C) ( P ≤ 0.0001). During P, the predicted Tc-min was significantly decreased compared with M and F ( P ≤ 0.0001). The amplitude of the Tc rhythm was significantly reduced in L compared with all other phases ( P ≤ 0.005). Neither the period nor acrophase was affected by menstrual cycle phase in ambulatory subjects. The use of an ingestible temperature sensor in conjunction with fast and accurate cosinor analysis provides a noninvasive method to mark menstrual phases, including the critical preovulatory period.

The Circadian Rhythm of Core Temperature: Origin and some Implications for Exercise Performance

2005 ◽  
Vol 22 (2) ◽  
pp. 207-225 ◽  
Author(s):  
Jim Waterhouse ◽  
Barry Drust ◽  
Dietmar Weinert ◽  
Benjamin Edwards ◽  
Warren Gregson ◽  
...  
Keyword(s):  
Circadian Rhythm ◽  
Core Temperature ◽  
Exercise Performance

11 Circadian Rhythm of Core Temperature, Blood Pressure and Heart Rate in Hypothyroid and Normal Rats

2015 ◽  
pp. 55-59
Author(s):  
P De Remigis ◽  
P Cugini ◽  
F Halberg ◽  
S Sensi ◽  
D Scavo
Keyword(s):  
Blood Pressure ◽  
Heart Rate ◽  
Circadian Rhythm ◽  
Core Temperature

Changes with Age Characterize Circadian Rhythm in Telemetered Core Temperature of Stroke-Prone Rats

1981 ◽  
Vol 36 (1) ◽  
pp. 28-30 ◽  
Author(s):  
J. Halberg ◽  
E. Halberg ◽  
P. Regal ◽  
F. Halberg
Keyword(s):  
Circadian Rhythm ◽  
Core Temperature

A statistical model of the human core-temperature circadian rhythm

2000 ◽  
Vol 279 (3) ◽  
pp. E669-E683 ◽  
Author(s):  
Emery N. Brown ◽  
Yong Choe ◽  
Harry Luithardt ◽  
Charles A. Czeisler
Keyword(s):  
Circadian Rhythm ◽  
Statistical Model ◽  
Core Temperature ◽  
Biological Clock ◽  
Autoregressive Process ◽  
Van Der Pol Oscillator ◽  
Model Parameters ◽  
Circadian Pacemaker ◽  
Van Der Pol ◽  
New Model

We formulate a statistical model of the human core-temperature circadian rhythm in which the circadian signal is modeled as a van der Pol oscillator, the thermoregulatory response is represented as a first-order autoregressive process, and the evoked effect of activity is modeled with a function specific for each circadian protocol. The new model directly links differential equation-based simulation models and harmonic regression analysis methods and permits statistical analysis of both static and dynamical properties of the circadian pacemaker from experimental data. We estimate the model parameters by using numerically efficient maximum likelihood algorithms and analyze human core-temperature data from forced desynchrony, free-run, and constant-routine protocols. By representing explicitly the dynamical effects of ambient light input to the human circadian pacemaker, the new model can estimate with high precision the correct intrinsic period of this oscillator (∼24 h) from both free-run and forced desynchrony studies. Although the van der Pol model approximates well the dynamical features of the circadian pacemaker, the optimal dynamical model of the human biological clock may have a harmonic structure different from that of the van der Pol oscillator.

The circadian rhythm of body core temperature (CRT) is normal in patient with congenital generalized anhidrosis

2002 ◽  
Vol 12 (3) ◽  
pp. 170-173 ◽  
Author(s):  
Sabina Cevoli ◽  
Giulia Pierangeli ◽  
Fabiola Magnifico ◽  
Giuseppe Bonavina ◽  
Giorgio Barletta ◽  
...  
Keyword(s):  
Circadian Rhythm ◽  
Core Temperature ◽  
Body Core Temperature ◽  
Body Core
Sign in / Sign up

Export Citation Format

Share Document