Operant behavior and rectal temperature of squirrel monkeys during 2.45-GHz microwave irradiation

Radio Science ◽  
1979 ◽  
Vol 14 (6S) ◽  
pp. 217-225 ◽  
Author(s):  
John de Lorge
Keyword(s):  
Microwave Irradiation ◽  
Rectal Temperature ◽  
Operant Behavior ◽  
Squirrel Monkeys

Group Operant Behavior in Free-Feeding Squirrel Monkeys

1972 ◽  
Vol 30 (2) ◽  
pp. 572-574 ◽  
Author(s):  
Marion D. Harless
Keyword(s):  
Operant Behavior ◽  
Squirrel Monkeys ◽  
Free Feeding

Colony caged squirrel monkeys provided with ad lib. food lever pressed at high rates for Noyes pellets on CRF. 4 males had been hand shaped in individual chambers earlier but 7 females were naive; all but 2 females were observed pressing the bar on the first day.

Baroreflexive depression of oxygen consumption in the squirrel monkey at 10 degrees C

1977 ◽  
Vol 232 (5) ◽  
pp. H451-H458 ◽  
Author(s):  
N. Wasserstrum ◽  
J. A. Herd
Keyword(s):  
Blood Pressure ◽  
Heart Rate ◽  
Oxygen Consumption ◽  
Rectal Temperature ◽  
Cold Exposure ◽  
Squirrel Monkeys ◽  
Inhibitory Effects ◽  
Arterial Blood ◽  
Total Body ◽  
Total Body Oxygen

Unanesthetized squirrel monkeys exposed to an ambient temperature of 10 degrees C showed elevations in total body oxygen consumption (VO2), arterial blood pressure (BP), and heart rate (HR) above values recorded at 28 degrees C. Further elevation of BP in the cold by intravenous infusion of phenylephrine was accompanied by immediate reduction in VO2, inhibition of shivering, and decrease in rectal temperature, as well as immediate reduction in HR. The magnitude of reduction in VO2 correlated with the magnitude of the concomitant baroreflexive bradycardia. When the pressor effects of phenylephrine were opposed by administration of diazoxide or phentolamine, the inhibitory effects of phenylephrine on both HR and VO2 were abolished. In animals previously subjected to bilateral sinoaortic denervation, both the bradycardia and depression in oxygen consumption normally associated with BP elevation were markedly reduced. These results suggest that elevation of blood pressuere can inhibit the thermoregulatory increase in total body oxygen consumption normally produced by cold exposure, and that this inhibition, like the concomitant bradycardia, is probably mediated via the sinoaortic baroreceptors.

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