Seasonal differences in brown adipose tissue density and pulse rate variability in a thermoneutral environment
| Autor: | Naoki Sakane, Yuko Kurosawa, Takafumi Hamaoka, Sawako Wakui, Shinsuke Nirengi, Toshiyuki Homma, Shiho Amagasa |
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| Rok vydání: | 2018 |
| Předmět: |
Adult
Male 0301 basic medicine Physiology Cold exposure Human Factors and Ergonomics lcsh:GN49-298 030204 cardiovascular system & hematology Biology Brown adipose tissue Anthropology Physical Young Adult 03 medical and health sciences 0302 clinical medicine Animal science Adipose Tissue Brown Heart Rate Physiology (medical) Heart rate medicine Humans Autonomic nervous system Orthopedics and Sports Medicine Very low frequency Students lcsh:Physical anthropology. Somatology Spectroscopy Near-Infrared Anthropometry Public Health Environmental and Occupational Health Seasonality Near-infrared time-resolved spectroscopy medicine.disease 030104 developmental biology medicine.anatomical_structure Anthropology Female Original Article Seasons Thermogenesis Pulse rate variability |
| Zdroj: | Journal of Physiological Anthropology Journal of Physiological Anthropology, Vol 37, Iss 1, Pp 1-7 (2018) |
| ISSN: | 1880-6805 |
| Popis: | Background Brown adipose tissue (BAT) is sympathetically activated and induces thermogenesis during cold exposure, thereby influencing energy expenditure and body fat levels. The very low frequency (VLF) components of pulse rate variability could be a form of thermogenic sympathetic nervous activity, but no clear relationship has yet been reported between VLF activity and BAT density. We therefore aimed to evaluate the association between them. Methods We enrolled 20 adults in winter and 20 matched adults in summer. We assessed BAT densities based on total hemoglobin concentrations ([total-Hb]) measured with near-infrared time-resolved spectroscopy. We calculated VLF activity from pulse rate variability measurements. Results BAT density ([total-Hb]; winter 70.5 ± 17.0 μM, summer 57.8 ± 18.3 μM) and VLF activity (winter 6.7 ± 0.8, summer 6.1 ± 0.9) were significantly higher in winter than in summer (P |
| Databáze: | OpenAIRE |
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