The influence of ambient temperature on brain homeothermia in the ox (Bos taurus)

Chęsy, G.; Caputa, M; Kędziela, W.; Kozak, Wiesław; Lachowski, A.

doi:10.1016/0306-4565(83)90006-2

Cited by 13 publications

(2 citation statements)

References 22 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Because T re always exceeded T car (under the conditions of our study), the use of T re to estimate SBC will result in an overestimate of SBC. The magnitude of SBC we observed in sheep is consistent with that reported in other ungulates where T car has been used to calculate SBC (11,15,21,23,27,28,34).…”

Section: Discussionsupporting

confidence: 90%

Rectal temperature measurement results in artifactual evidence of selective brain cooling

Maloney

Fuller

Mitchell

et al. 2001

American Journal of Physiology-Regulatory, Integrative and Comp

View full text Add to dashboard Cite

Selective brain cooling (SBC) is defined as a brain temperature cooler than the temperature of arterial blood from the trunk. Surrogate measures of arterial blood temperature have been used in many published studies on SBC. The use of a surrogate for arterial blood temperature has the potential to confound proper identification of SBC. We have measured brain, carotid blood, and rectal temperatures in conscious sheep exposed to 40, 22, and 5 degrees C. Rectal temperature was consistently higher than arterial blood temperature. Brain temperature was consistently cooler than rectal temperature during all exposures. Brain temperature only fell below carotid blood temperature during the final few hours of 40 degrees C exposure and not at all during the 5 degrees C exposure. Consequently, using rectal temperature as a surrogate for arterial blood temperature does not provide a reliable indication of the status of the SBC effector. We also show that rapid suppression of SBC can result if the animals are disturbed.

show abstract

Section: Discussionsupporting

confidence: 90%

Rectal temperature measurement results in artifactual evidence of selective brain cooling

Maloney

Fuller

Mitchell

et al. 2001

American Journal of Physiology-Regulatory, Integrative and Comp

View full text Add to dashboard Cite

show abstract

“…In mammals, the temperature of the CNS is also important in regulating tissue activity (Blumberg and Moltz, 1988;Caputa et al, 1983;Chesy et al, 1983;Miller and South, 1979;Wunnenberg, 1973) and contributes to prolonging dives in marine mammals by reducing metabolic demands (Cossins and Bowler, 1987;Elsner, 1999;Hochachka and Guppy, 1986;Ponganis et al, 2003). The superficial venous returns from the skin and evaporatively cooled blood at or near respiratory structures provide cooled blood that could modify deep body temperatures and extend dive capabilities (Rommel et al, 1995); deeper divers (such as beaked whales) could conceivably have excellent control of this thermoregulation mechanism.…”

Section: The Vascular Systemmentioning

confidence: 99%

Elements of beaked whale anatomy and diving physiology and some hypothetical causes of sonar-related stranding

Rommel¹,

Costidis²,

Fernández³

et al. 2023

JCRM

View full text Add to dashboard Cite

A number of mass strandings of beaked whales have in recent decades been temporally and spatially coincident with military activities involving the use of midrange sonar. The social behaviour of beaked whales is poorly known, it can be inferred from strandings and some evidence of at-sea sightings. It is believed that some beaked whale species have social organisation at some scale; however most strandings are of individuals, suggesting that they spend at least some part of their life alone. Thus, the occurrence of unusual mass strandings of beaked whales is of particular importance. In contrast to some earlier reports, the most deleterious effect that sonar may have on beaked whales may not be trauma to the auditory system as a direct result of ensonification. Evidence now suggests that the most serious effect is the evolution of gas bubbles in tissues, driven by behaviourally altered dive profiles (e.g. extended surface intervals) or directly from ensonification. It has been predicted that the tissues of beaked whales are supersaturated with nitrogen gas on ascent due to the characteristics of their deep-diving behaviour. The lesions observed in beaked whales that mass stranded in the Canary Islands in 2002 are consistent with, but not diagnostic of, decompression sickness. These lesions included gas and fat emboli and diffuse multiorgan haemorrhage. This review describes what is known about beaked whale anatomy and physiology and discusses mechanisms that may have led to beaked whale mass strandings that were induced by anthropogenic sonar. Beaked whale morphology is illustrated using Cuvier’s beaked whale as the subject of the review. As so little is known about the anatomy and physiology of beaked whales, the morphologies of a relatively well-studied delphinid, the bottlenose dolphin and a well-studied terrestrial mammal, the domestic dog are heavily drawn on.

show abstract

Selective Brain Cooling during Fever ?

Kuhnen

1994

Thermal Balance in Health and Disease

View full text Add to dashboard Cite

The influence of ambient temperature on brain homeothermia in the ox (Bos taurus)

Cited by 13 publications

References 22 publications

Rectal temperature measurement results in artifactual evidence of selective brain cooling

Rectal temperature measurement results in artifactual evidence of selective brain cooling

Elements of beaked whale anatomy and diving physiology and some hypothetical causes of sonar-related stranding

Selective Brain Cooling during Fever ?

Contact Info

Product

Resources

About