Brain and Body Temperatures in a Panting Lizard

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Science  04 Aug 1972:
Vol. 177, Issue 4047, pp. 431-433
DOI: 10.1126/science.177.4047.431


Panting in Sauromalus obesus is effective enough to keep deep body temperature (TC) and brain temperature (TB) below an ambient temperature of 45°C for extended periods of time and has a greater cooling effect on the brain than on the remainder of the body. Six animals maintained TC and TB 0.9°C (± 0.08 standard error) and 2.7°C (± 0.2 standard error) respectively lower than the ambient temperature of 45°C. It is possible that intracranial vascular shunts play a role in cranial cooling during panting.