Effects of Low Temperatures on the Formation of Adaptive Reactions: A Review

Patrakeeva, V. P.; Basova, Elena

doi:10.21103/article8(2)_ra1

Cited by 4 publications

(1 citation statement)

References 25 publications

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“…General cooling of the human body can cause different ratios between the activity of the neurophysiological mechanisms, sympathetic and parasympathetic regulation of heart rhythm and vascular tone, (1)(2)(3)(4) and mobilization of the immune system in the form of enhanced pro-and anti-inflammatory reactions. (5) Against the background of general cooling, the core body temperature is maintained through increased vasoconstriction in peripheral tissues (skin, subcutaneous fat) and an increase in BP. It is believed that stable, increased BP in Arctic residents subjected to moderate exposure to cold (-10°С) may not lead to aggravation of symptoms of arterial hypertension, as this action reduces the body's sympathetic response to exposure to cold.…”

Section: Introductionmentioning

confidence: 99%

Relationships between Parameters of the Cardiovascular System, Salivary Lactoferrin Level and Body Temperature during a Short-Term Human Whole-Body Exposure to Cold Air

Поскотинова¹,

Кривоногова²,

Krivonogova³

et al. 2019

IJBM

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Background: The problem of maintaining body temperature in people working outdoors in the cold air of the Arctic remains relevant. The purpose of this study was to determine the autonomic nervous mechanisms of regulation of heart rate (HR), blood pressure (BP) and local immunity on the example of the dynamics of salivary lactoferrin during a decrease in body temperature in humans (the core and the skin of hands) during and after a short-term, whole-body exposure to cold air. Materials and Methods: A total of 15 healthy Russian male volunteers aged between18 and 20 years, born and living in Arkhangelsk, were examined in the winter. Research stages: the registration of indicators before exposure to the cold air (Stage 1), during the 10-minute exposure to the cold air at-20 °C (Stage 2) and after the 10-minute exposure to the cold air (Stage 3). The registration of indicators in Stages 1 and 3 was carried out indoors at an air temperature of +20 °C. HR (bpm), the heart rate variability (HRV) parameters, systolic and diastolic blood pressure (BPsyst, BPdiast, mm Hg), salivary lactoferrin level (ng/ml) by ELISA and the body temperature in the ear canal (Tear, °C) and on the skin of the dorsum of the right hand (Tskin, °C) were determined at each stage of the study. Results: In Stage 2 with significantly decreased Tear and Tskin, compared to the initial indicators in Stage 1, there was a significant increase in HRV indices reflecting the overall HRV and vagal effects on the heart rhythm. At the same time, HR was significantly decreased, as well as stress index. An increase in the total power (TP) of the HRV spectrum was revealed due to a predominant increase in HF and VLF, and to a lesser degree in LF. Both BPsyst and BPdiast significantly increased. After cooling in Stage 3, HR increased, but remained significantly lower than the initial values. The overall HRV according to SDNN and TP decreased, reaching baseline values. Concentrations of salivary lactoferrin during cooling in Stage 2 tended to increase, which was also maintained in Step 3 after cooling. Correlation analysis in the entire sample (n=15) revealed a positive correlation between SDNN and Tear in Stage 2 (r s =0.56, P=0.035). In Stage 2, the change in Tskin was significantly correlated with the salivary lactoferrin level (r s =-0.73, P=0.003); this relationship was also found in Stage 3 (r s =-0.65, P=0.015). Conclusion: The successful return of body temperature after general cooling occurs under the condition of increasing the overall HRV, enhancing vagal influences on the heart rhythm, HF and VLF components of HRV during cooling. An increase in the level of salivary lactoferrin, while maintaining vagal reserves of the vegetative regulation of heart rhythm against a decrease in skin temperature during general cooling, as well as a decrease in the level of lactoferrin against the background of recovery of body temperature after cooling, at least 10 minutes, can be regarded as an adaptive response of the body to exposure to cold temperature with minimal ri...

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Section: Introductionmentioning

confidence: 99%

Relationships between Parameters of the Cardiovascular System, Salivary Lactoferrin Level and Body Temperature during a Short-Term Human Whole-Body Exposure to Cold Air

Поскотинова¹,

Кривоногова²,

Krivonogova³

et al. 2019

IJBM

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Sympathetic Nervous System Co-Transmitters ATP and Norepinephrine Oppositely Modulate Antibody Production in the Rat Spleen under Deep Cooling

Kozyreva,

Meyta

2023

J Evol Biochem Phys

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The Effect of Synchronizing the Human Heart Rhythm with Geomagnetic Field Variations: Are There Distinguished Frequencies?

Zenchenko,

Khorseva,

Stankevich

2024

Biofizika

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Ongoing research continues to explore the phenomenology of the effect of synchronization between oscillations of a human resting heart rate and variations of the geomagnetic field in the period range 3–40 minutes. A total of 508 experiments have been conducted for the period 2012–2023 (each experiment lasted 100–120 minutes) to monitor the minute indicators of heart rate for three healthy women (55, 45, and 30 years old). 328, 113, and 67 measurements were made, respectively. The results indicate that, for each of these three volunteers, approximately 60% of the experiments yielded a wavelet spectrum of heart rate values that closely resembled the spectrum of synchronous variations of at least one of the horizontal components of the geomagnetic field (X or Y). Additionally, within the investigated frequency range of 3–40 minutes, three subbands were identified and in these sub-bands, the degree of synchrony of oscillations was maximal: 3.5 minutes, 10–12 minutes and 33–36 minutes. It can be concluded that the effect of biogeosynchronization is not uniformly implemented over the entire range from 3 to 40 minutes, but it is mainly evident in these sub-bands.

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Effects of Low Temperatures on the Formation of Adaptive Reactions: A Review

Cited by 4 publications

References 25 publications

Relationships between Parameters of the Cardiovascular System, Salivary Lactoferrin Level and Body Temperature during a Short-Term Human Whole-Body Exposure to Cold Air

Relationships between Parameters of the Cardiovascular System, Salivary Lactoferrin Level and Body Temperature during a Short-Term Human Whole-Body Exposure to Cold Air

Sympathetic Nervous System Co-Transmitters ATP and Norepinephrine Oppositely Modulate Antibody Production in the Rat Spleen under Deep Cooling

The Effect of Synchronizing the Human Heart Rhythm with Geomagnetic Field Variations: Are There Distinguished Frequencies?

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