keyword
MENU ▼
Read by QxMD icon Read
search

Thermoregulation

keyword
https://www.readbyqxmd.com/read/28344454/the-effect-of-intermittent-head-cooling-on-aerobic-performance-in-the-heat
#1
Peter Walters, Nathaniel Thom, Kai Libby, Shelby Edgren, Amanda Azadian, Daniel Tannous, Elisabeth Sorenson, Brian Hunt
Thermoregulation is critical for athletes, particularly those for those who must perform in the heat. Most strategies aimed at reducing heat stress have cooled participants before or during activity. The objective of this study is to investigate whether seven minutes of head cooling applied between bouts of aerobic exercise in hot (35 ± 1.0 °C) and dry (14.68 ±4.29% rh) environmental conditions could positively effect participants peak power output (PP) on a maximal effort graded exercise test (GXT). Twenty-two recreational active men ages 18 to 23 (19...
March 2017: Journal of Sports Science & Medicine
https://www.readbyqxmd.com/read/28343577/effects-of-pregnancy-on-body-temperature-and-locomotor-performance-of-velvet-geckos
#2
Buddhi Dayananda, Nora Ibargüengoytía, Martin J Whiting, Jonathan K Webb
Pregnancy is a challenging period for egg laying squamates. Carrying eggs can encumber females and decrease their locomotor performance, potentially increasing their risk of predation. Pregnant females can potentially reduce this handicap by selecting higher temperatures to increase their sprint speed and ability to escape from predators, or to speed up embryonic development and reduce the period during which they are burdened with eggs ('selfish mother' hypothesis). Alternatively, females might select more stable body temperatures during pregnancy to enhance offspring fitness ('maternal manipulation hypothesis'), even if the maintenance of such temperatures compromises a female's locomotor performance...
April 2017: Journal of Thermal Biology
https://www.readbyqxmd.com/read/28343566/living-in-sympatry-the-effect-of-habitat-partitioning-on-the-thermoregulation-of-three-mediterranean-lizards
#3
Kostas Sagonas, Grigoris Kapsalas, Efstratios Valakos, Panayiotis Pafilis
The ability for effective, accurate and precise thermoregulation is of paramount importance for ectotherms. Sympatric lizards often partition their niche and select different microhabitats. These microhabitats, however, usually differ in their thermal conditions and lizards have to adapt their thermoregulation behavior accordingly. Here, we evaluated the impact of habitat partitioning on the thermal biology of three syntopic, congeneric lacertids (Podarcis peloponnesiacus, P. tauricus and P. muralis) from central Peloponnese, Greece...
April 2017: Journal of Thermal Biology
https://www.readbyqxmd.com/read/28343564/embryos-of-non-native-anoles-are-robust-to-urban-thermal-environments
#4
Sarin Tiatragul, Audeline Kurniawan, Jason J Kolbe, Daniel A Warner
The transformation of natural habitats into urban landscapes dramatically alters thermal environments, which in turn, can impact local biota. Ectothermic organisms that are oviparous are particularly sensitive to these altered environments because their embryos cannot behaviorally thermoregulate and the surrounding environment determines the temperature experienced during development. We studied the effects of urban and forested thermal environments on embryo development and hatchling phenotypes in two non-native lizards (Anolis sagrei and A...
April 2017: Journal of Thermal Biology
https://www.readbyqxmd.com/read/28343561/locomotor-and-energetic-consequences-of-behavioral-thermoregulation-in-the-sanguivorous-leech-hirudo-verbana
#5
Amanda C Hitchcock, Erin M Connolly, Karin Darakananda, Janet W Jeong, Arbor J L Quist, Allison B Robbins, David J Ellerby
Medicinal leeches (Hirudo verbana) thermoregulate with respect to their sanguivorous feeding behavior. Immediate postprandial preferences are for warmer than their initial acclimation temperature (Ta, 21°C, Petersen et al. 2011), while unfed leeches have a lower preferred temperature (Tpref, 12.5°C). This may reduce energy expenditure and defer starvation if feeding opportunities are limited. Energetic benefits may have an associated cost if low temperatures reduce mobility and the ability to locate further hosts...
April 2017: Journal of Thermal Biology
https://www.readbyqxmd.com/read/28337635/measurement-of-bovine-body-and-scrotal-temperature-using-implanted-temperature-sensitive-radio-transmitters-data-loggers-and-infrared-thermography
#6
A L Wallage, J B Gaughan, A T Lisle, L Beard, C W Collins, S D Johnston
Synchronous and continuous measurement of body (BT) and scrotal temperature (ST) without adverse welfare or behavioural interference is essential for understanding thermoregulation of the bull testis. This study compared three technologies for their efficacy for long-term measurement of the relationship between BT and ST by means of (1) temperature sensitive radio transmitters (RT), (2) data loggers (DL) and (3) infrared imaging (IRI). After an initial pilot study on two bulls to establish a surgical protocol, RTs and DLs were implanted into the flank and mid-scrotum of six Wagyu bulls for between 29 and 49 days...
March 23, 2017: International Journal of Biometeorology
https://www.readbyqxmd.com/read/28335860/-muscling-throughout-life-integrating-studies-of-muscle-development-homeostasis-and-disease-in-zebrafish
#7
Michelle F Goody, Erin V Carter, Elisabeth A Kilroy, Lisa Maves, Clarissa A Henry
The proper development and function of skeletal muscle is vital for health throughout the lifespan. Skeletal muscle function enables posture, breathing, and locomotion; and also impacts systemic processes-such as metabolism, thermoregulation, and immunity. Diseases of skeletal muscle (myopathies, muscular dystrophies) and even some neurological, age-related, and metabolic diseases compromise muscle function and negatively affect health span and quality of life. There have been numerous, recent examples of studies on skeletal muscle development with exciting, therapeutic implications for muscle diseases...
2017: Current Topics in Developmental Biology
https://www.readbyqxmd.com/read/28332601/trpm8-in-the-negative-regulation-of-tnf%C3%AE-expression-during-cold-stress
#8
Xin-Pei Wang, Xuan Yu, Xiao-Jin Yan, Fan Lei, Yu-Shuang Chai, Jing-Fei Jiang, Zhi-Yi Yuan, Dong-Ming Xing, Li-Jun Du
Transient Receptor Potential Melastatin-8 (TRPM8) reportedly plays a fundamental role in a variety of processes including cold sensation, thermoregulation, pain transduction and tumorigenesis. However, the role of TRPM8 in inflammation under cold conditions is not well known. Since cooling allows the convergence of primary injury and injury-induced inflammation, we hypothesized that the mechanism of the protective effects of cooling might be related to TRPM8. We therefore investigated the involvement of TRPM8 activation in the regulation of inflammatory cytokines...
March 23, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28328067/diminishing-returns-limit-energetic-costs-of-climate-change
#9
Ofir Levy, Jason D Borchert, Travis W Rusch, Lauren B Buckley, Michael J Angilletta
Changes in the time available for organisms to maintain physiologically preferred temperatures (thermal opportunity) is a primary mechanism by which climate change impacts the fitness and population dynamics of organisms. Yet, it is unclear whether losses or gains in thermal opportunity result in proportional changes in rates of energy procurement and use. We experimentally quantified lizard food consumption and energy assimilation at different durations of thermal opportunity. We incorporated these data in an individual-based model of foraging and digestion in lizards to explore the implications of nonlinear responses to shifts in thermal opportunity across a wide geographic range...
March 22, 2017: Ecology
https://www.readbyqxmd.com/read/28324161/thermal-ecology-of-three-coexistent-desert-lizards-implications-for-habitat-divergence-and-thermal-vulnerability
#10
Shu-Ran Li, Yang Wang, Liang Ma, Zhi-Gao Zeng, Jun-Huai Bi, Wei-Guo Du
How ectotherms exploit thermal resources has important implications for their habitat utilization and thermal vulnerability to climate warming. To address this issue, we investigated thermal relations of three sympatric lizard species (Eremias argus, Eremias multiocellata, and Phrynocephalus przewalskii) in the desert steppe of Inner Mongolia, China. We determined the thermoregulatory behavior, body temperature (T b), operative temperature (T e), selected body temperature (T sel), and critical thermal maximum (CTmax) of adult lizards...
March 21, 2017: Journal of Comparative Physiology. B, Biochemical, Systemic, and Environmental Physiology
https://www.readbyqxmd.com/read/28323792/the-effect-of-intermittent-vest-cooling-on-thermoregulation-and-cardiovascular-strain-in-baseball-catchers
#11
Stacy Bishop, David J Szymanski, Greg A Ryan, Robert L Herron, Phil A Bishop
Baseball catchers are exposed to multiple physiological challenges while playing outside during the spring and summer months, many of which deal with recovery and thermoregulation. The purpose of this study was to investigate the effect of intermittent cooling on core temperature, cardiovascular strain, exertion, and recovery during a simulated catching performance in the heat. Six trained college-aged baseball catchers performed in a controlled, hot (35 °C) and humid (25% relative humidity) environment in a counter-balanced, cross-over design...
March 20, 2017: Journal of Strength and Conditioning Research
https://www.readbyqxmd.com/read/28318360/axillary-hyperhidrosis-a-focused-review
#12
Jason E Sammons, Amor Khachemoune
Axillary hyperhidrosis is characterized by an increased amount of sweat production, localized to the armpits, to compensate for environmental conditions and to control thermoregulation. It affects about 3.12% of the US population. It has a significant effect on one's psychological and physical health, as well as one's occupational life. The objective of this paper is to review the epidemiology, clinical presentation, pathophysiology, histology, and genetics, and management and treatment of axillary hyperhidrosis...
March 20, 2017: Journal of Dermatological Treatment
https://www.readbyqxmd.com/read/28317427/fatigue-is-it-all-neurochemistry
#13
Romain Meeusen, Bart Roelands
Fatigue during exercise can be approached from different angles. Peripheral fatigue is usually described as an impairment located in the muscle and characterized by a metabolic end point, while central fatigue is defined as a failure of the central nervous system to adequately drive the muscle. The aim of the present narrative review paper is to look at the mechanisms involved in the occurrence of fatigue during prolonged exercise, predominantly from a brain neurochemical point of view. From studies in rodents it is clear that exercise increases the release of several neurotransmitters in different brain regions, and that the onset of fatigue can be manipulated when dopaminergic influx in the preoptic and anterior hypothalamus is increased, interfering with thermoregulation...
March 19, 2017: European Journal of Sport Science
https://www.readbyqxmd.com/read/28315647/a-device-that-allows-rodents-to-behaviorally-thermoregulate-when-housed-in-vivariums
#14
Christopher J Gordon, Earl T Puckett, Elizabeth S Repasky, Andrew F M Johnstone
Laboratories and vivariums typically are maintained at ambient temperatures of 20 to 24 °C, leading to cold stress in mice. When mice are inactive and sleeping during the light phase, their zone of thermoneutrality associated with a basal metabolic rate is 30 to 32 °C. If given a choice, mice will use thermoregulatory behavior to seek out thermoneutral temperatures during the light phase. The cold stress of a vivarium can be problematic to researchers requiring an animal model that is not stressed metabolically...
March 1, 2017: Journal of the American Association for Laboratory Animal Science: JAALAS
https://www.readbyqxmd.com/read/28314947/seasonal-adaptations-in-energy-budgeting-in-the-primate-lepilemur-leucopus
#15
Janina Bethge, Bianca Wist, Eleanor Stalenberg, Kathrin Dausmann
The spiny forest of South Madagascar is one of the driest and most unpredictable habitats in Africa. The small-bodied, nocturnal primate Lepilemur leucopus lives in this harsh habitat with high diurnal and seasonal changes in ambient temperature. In this study, we investigated seasonal adaptions in energy budgeting of L. leucopus, which allow it to live under these conditions by measuring resting metabolic rate using open-flow respirometry. No signs of heterothermy were detected, and resting metabolic rate was significantly lower in the warmer wet season than in the colder dry season...
March 17, 2017: Journal of Comparative Physiology. B, Biochemical, Systemic, and Environmental Physiology
https://www.readbyqxmd.com/read/28314750/octopamine-and-tyramine-modulate-the-thermoregulatory-fanning-response-in-honey-bees-apis-mellifera-l
#16
Chelsea N Cook, Colin S Brent, Michael D Breed
Biogenic amines regulate the proximate mechanisms underlying most behavior, including those that contribute to the overall success of complex societies. For honey bees, one critical set of behaviors contributing to the welfare of a colony is involved with nest thermoregulation. Worker honeybees cool the colony by performing a fanning behavior, the expression of which is largely influenced by response thresholds modulated by the social environment. Here, we examined how changes in biogenic amines affect this group-performed thermoregulatory fanning behavior in honeybees...
March 17, 2017: Journal of Experimental Biology
https://www.readbyqxmd.com/read/28306631/thermoregulate-autoregulate-and-ventilate-brain-directed-critical-care-for-pediatric-cardiac-arrest
#17
Jonathan E Kurz, Craig M Smith, Mark S Wainwright
PURPOSE OF REVIEW: Cardiac arrest in childhood is associated with a high risk for mortality and poor long-term functional outcome. This review discusses the current evidence for neuroprotective therapies and goals for postarrest care in the context of the pathophysiology of hypoxic-ischemic injury, modalities for neurologic prognostication in these children and potential future monitoring paradigms for maximizing cerebral perfusion in the postarrest period. RECENT FINDINGS: The recent publication of the in-hospital and out-of-hospital Therapeutic Hypothermia After Cardiac Arrest trials demonstrated a lack of statistically significant benefit for the use of postarrest therapeutic hypothermia...
March 16, 2017: Current Opinion in Pediatrics
https://www.readbyqxmd.com/read/28302796/an-adipo-biliary-uridine-axis-that-regulates-energy-homeostasis
#18
Yingfeng Deng, Zhao V Wang, Ruth Gordillo, Yu An, Chen Zhang, Qiren Liang, Jun Yoshino, Kelly M Cautivo, Jef De Brabander, Joel K Elmquist, Jay D Horton, Joseph A Hill, Samuel Klein, Philipp E Scherer
Uridine, a pyrimidine nucleoside present at high levels in the plasma of rodents and humans, is critical for RNA synthesis, glycogen deposition, and many other essential cellular processes. It also contributes to systemic metabolism, but the underlying mechanisms remain unclear. We found that plasma uridine levels are regulated by fasting and refeeding in mice, rats, and humans. Fasting increases plasma uridine levels, and this increase relies largely on adipocytes. In contrast, refeeding reduces plasma uridine levels through biliary clearance...
March 17, 2017: Science
https://www.readbyqxmd.com/read/28291489/modeling-of-gender-differences-in-thermoregulation
#19
Anthony E Iyoho, Laurel J Ng, Lisa MacFadden
In January 2013, the Department of Defense lifted a ban that had prevented women from holding combat positions in the military. However, innate differences in physical traits and physiology between men and women likely will result in differences in physical performance. Sex differences in thermoregulation is a key area that needs to be examined due to the potential impact on physical performance. Therefore, we expanded our previously developed thermoregulation model (TRM) to include the effects of gender. Women have been found to have a lower sweat output in heat stress and lesser shivering in cold stress than men; therefore, the equations for sweat mass loss rate and shivering heat generation were modified for women accordingly...
March 2017: Military Medicine
https://www.readbyqxmd.com/read/28288222/-the-benefits-of-breastfeeding-and-associated-risks-of-replacement-with-baby-formulas
#20
Paulina Brahm, Verónica Valdés
Breastfeeding is the nourishment designed by nature for the newborn and the infant; however its prevalence is nowadays not optimal. The aim of this article is to review the current evidence of the benefits of breastfeeding for children and society, and to elaborate the risks associated with the replacement of lactation with baby formulas. Breastfeeding is a protective factor for several infectious, atopic, and cardiovascular diseases as well as for leukaemia, necrotising enterocolitis, celiac disease, and inflammatory bowel disease...
February 2017: Revista Chilena de Pediatría
keyword
keyword
7367
1
2
Fetch more papers »
Fetching more papers... Fetching...
Read by QxMD. Sign in or create an account to discover new knowledge that matter to you.
Remove bar
Read by QxMD icon Read
×

Search Tips

Use Boolean operators: AND/OR

diabetic AND foot
diabetes OR diabetic

Exclude a word using the 'minus' sign

Virchow -triad

Use Parentheses

water AND (cup OR glass)

Add an asterisk (*) at end of a word to include word stems

Neuro* will search for Neurology, Neuroscientist, Neurological, and so on

Use quotes to search for an exact phrase

"primary prevention of cancer"
(heart or cardiac or cardio*) AND arrest -"American Heart Association"