Thermoregulatory responses to altering hypothalamic temperature in the harbor seal.

摘要: The rostral brainstem of the harbor seal Phoca vitulina was cooled and heated 33-41 degrees C while oxygen consumption rectal, hypothalamic, flipper dorsal skin temperatures were measured. These experiments made on restrained seals at ambient -15 to 30 C. Cooling preoptic hypothalamic (POH) tissue increased in a way that could be approximated by linear regression line with slope threshold temperature which metabolic rate minimal. function rectal temperature. At each temperature, significantly higher for lower all temperatures, did not very consistently or either results are explicable suggesting thermal-sensitive reference neurons POH regulate body inhibited equally extrahypothalamic cold transducing neural elements.