Amplitude of One-Minute Fluctuations of Secondary Cosmic Rays as a Marker of Environmental Factor Determining Ultradian Rhythms in Body Temperature of Laboratory Rats

2021 ◽  
Author(s):  
M. A. Diatroptova ◽  
M. E. Diatroptov
Keyword(s):  
Body Temperature ◽  
Cosmic Rays ◽  
Environmental Factor ◽  
Ultradian Rhythms ◽  
Laboratory Rats

scholarly journals Ultradian Rhythms in Heart Rate Variability and Distal Body Temperature Anticipate the Luteinizing Hormone Surge Onset

2020 ◽  
Author(s):  
Azure D. Grant ◽  
Mark Newman ◽  
Lance J. Kriegsfeld
Keyword(s):  
Heart Rate ◽  
Heart Rate Variability ◽  
Menstrual Cycle ◽  
Body Temperature ◽  
Inflection Point ◽  
Ultradian Rhythms ◽  
Fertility Awareness ◽  
Lh Surge ◽  
Non Invasive ◽  
Sleep Timing

AbstractThe human menstrual cycle is characterized by predictable patterns of physiological change across timescales, yet non-invasive anticipation of key events is not yet possible at individual resolution. Although patterns of reproductive hormones across the menstrual cycle have been well characterized, monitoring these measures repeatedly to anticipate the preovulatory luteinizing hormone (LH) surge is not practical for fertility awareness. In the present study, we explored whether non-invasive and high frequency measures of distal body temperature (DBT), sleeping heart rate (HR), sleeping heart rate variability (HRV), and sleep timing could be used to anticipate the preovulatory LH surge in women. To test this possibility, we used signal processing to examine these measures across the menstrual cycle. Cycles were examined from both pre- (n=45 cycles) and perimenopausal (n=10 cycles) women using days of supra-surge threshold LH and dates of menstruation for all cycles. For a subset of cycles, urinary estradiol and progesterone metabolites were measured daily around the time of the LH surge. Wavelet analysis revealed a consistent inflection point of ultradian rhythm (2-5 h) power of DBT and HRV that enabled anticipation of the LH surge at least 2 days prior to its onset in 100% of individuals. In contrast, the power of ultradian rhythms in heart rate, circadian rhythms in body temperature, and metrics of sleep duration and sleep timing were not predictive of the LH surge. Together, the present findings reveal fluctuations in distal body temperature and heart rate variability that consistently anticipate the LH surge and may aid in fertility awareness.Key PointsUltradian (2-5 h) rhythm power of distal body temperature and heart rate variability (RMSSD) exhibits a stereotyped inflection point and peak in the days leading up to the LH surge in premenopausal women.Circadian rhythms of distal body temperature and single time-point/day metrics do not permit anticipation of the LH surge.Measurement of continuous metabolic and autonomic outputs, enabling assessment of ultradian rhythms, may be of value to the fertility awareness method.

Infradian and Ultradian Rhythms of Body Temperature Resumption during Hibernation

2019 ◽  
Vol 168 (2) ◽  
pp. 291-294
Author(s):  
M. E. Diatroptov ◽  
M. V. Rutovskaya ◽  
E. V. Kuznetsova ◽  
M. A. Diatroptova ◽  
A. M. Kosyreva ◽  
...  
Keyword(s):  
Body Temperature ◽  
Ultradian Rhythms

Combination of ketamine and xylazine with opioids and acepromazine in rats: Physiological changes and their analgesic effect analysed by ultrasonic vocalization

2019 ◽  
Vol 54 (2) ◽  
pp. 171-182
Author(s):  
Jilma Alemán-Laporte ◽  
Luciana A Bandini ◽  
Mariana SA Garcia-Gomes ◽  
Dennis A Zanatto ◽  
Denise T Fantoni ◽  
...  
Keyword(s):  
Postoperative Pain ◽  
Body Temperature ◽  
Analgesic Effect ◽  
Formalin Test ◽  
Recovery Period ◽  
Ultrasonic Vocalization ◽  
Physiological Changes ◽  
Good Recovery ◽  
Laboratory Rats ◽  
Balanced Anaesthesia

In this study, the effect of four anaesthetic protocols that included the combination of xylazine (X) and ketamine (K) with acepromazine (A) and opioids (methadone (Me), morphine (Mo) or tramadol (T)) was evaluated in laboratory rats of both sexes. Ultrasonic vocalization (USV) was used as an indicator of pain during the recovery period. The objective was to evaluate the physiological parameters and the analgesic effect of each protocol to determine which protocol was the safest and fulfil the requirements of a balanced anaesthesia. The better protocols were the XKA protocol for both sexes and the XKMe protocol for females because the combinations achieve surgical plane of anaesthesia in rats. However, pain assessment during the formalin test revealed that rats anaesthetized with XKA produced more numbers of USV, suggesting that it is not a good protocol for the control of immediate postoperative pain. All protocols produced depression in body temperature and respiratory and heart rates, and had important effects, such as micturition and maintenance of open eyes. Only rats anaesthetized with XKA protocol did not present piloerection. These results demonstrated that good monitoring and care during anaesthesia must be included to prevent complications that compromise the life of the animal and to ensure a good recovery. The inclusion of analgesia in anaesthesia protocols must be used routinely, ensuring minimal presence of pain and thus more reliable results in the experimental procedures.

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