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  • 1
    Electronic Resource
    Electronic Resource
    Springer
    Pflügers Archiv 406 (1986), S. 351-355 
    ISSN: 1432-2013
    Keywords: Salivary secretion ; Hyperthermia ; Scrotal temperature ; Abdominal temperature ; Facial temperature ; Hypothalamic temperature ; Rat
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Abstract Effect of thermal stimulation on salivary secretion was examined in urethane anesthetized (i.p., 1.0 g/kg) rats. First, rectal temperature (T re) was maintained at various levels by warming the whole trunk with a heating blanket. Copious salivary secretion occurred whenT re reached a threshold value above 40°C, which is considerably higher than the threshold for tail vasodilation. Local warming of the scrotum, face, or hypothalamus also elicited salivary secretion, but only ifT re was in a limited range just below the threshold temperature at whichT re alone would induce salivary secretion. The higher theT re within that limited range, the lower the temperature of the site locally warmed at which salivary secretion began. Changes in temperature of the abdomen, not including the scrotum, modulated the salivary secretion elicited by scrotal warming. Hypothalamic and scrotal temperatures interacted with each other to affect salivary secretion. Temperature signals from both core and periphery thus appear to be integrated in bringing about salivary secretion. Thermally induced salivary secretion may function as a basis for saliva spreading behavior observed in rats in a hot environment.
    Type of Medium: Electronic Resource
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  • 2
    Electronic Resource
    Electronic Resource
    Springer
    European journal of applied physiology 58 (1989), S. 446-451 
    ISSN: 1439-6327
    Keywords: Rectal temperature ; Tail vasomotor response ; Exercise ; Estrus cycle ; Rat
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Summary In female rats, rectal temperature (T re), tail vasomotor response, oxygen uptake $$\left( {\dot V_{{\text{O}}_{\text{2}} } } \right)$$ , and carbon dioxide production $$\left( {\dot V_{{\text{CO}}_{\text{2}} } } \right)$$ were measured in proestrus and estrus stages during treadmill running at two different speeds at an ambient temperature (T a) of 24° C. Experiments were performed at 2.00–6.00 a.m., when the difference inT re was greatest between the two stages;T re at rest in the estrus stage was 0.54° C higher than in the proestrus stage. In a mild warm environment, thresholdT re for a rise in tail skin temperature (T tail) was also higher in the estrus stage than in the proestrus stage. In contrast, no difference was seen in the thresholdT re and steady stateT re at the end of exercise between proestrus and estrus stages. These values were higher at the higher work intensity. $$\dot V_{{\text{O}}_{\text{2}} } $$ was also similar between the two stages, except in the second 5 min after the beginning of exercise, when $$\dot V_{{\text{O}}_{\text{2}} } $$ was greater andT re rose more steeply in the proestrus stage. These data indicate that deep body temperature during exercise is regulated at a certain level depending on the work intensity and is not influenced by the estrus cycle.
    Type of Medium: Electronic Resource
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