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Body temperature: possible ionic mechanism in the hypothalamus controlling the set point
Science (New York, N.Y.)
|October 2, 1970
Summary
Mammalian body temperature regulation relies on posterior hypothalamus ion balance. Sodium ions increase body temperature, while calcium ions decrease it when the other is absent.
Area of Science:
- Neuroscience
- Physiology
- Thermoregulation
Background:
- Mammalian body temperature is typically regulated around 37°C.
- This thermoregulation is linked to ion balance in the posterior hypothalamus.
Purpose of the Study:
- To investigate the role of sodium and calcium ions in the posterior hypothalamus on body temperature regulation.
Main Methods:
- Perfusion of the posterior hypothalamus in unanesthetized cats.
- Varying concentrations of extracellular sodium and calcium ions.
Main Results:
- Excess extracellular sodium ions, without calcium, elevated body temperature.
- Excess extracellular calcium ions, without sodium, decreased body temperature.
Conclusions:
- The balance of sodium and calcium ions in the posterior hypothalamus is critical for maintaining body temperature set points.
- Specific ion concentrations directly influence thermoregulation.