| Abstrakt: |
Experiments were performed on cats under urethane anesthesia. The effect of cooling on the content of the phosphorus fractions and transmission of nervous excitation in the superior cervical ganglion was studied. Experiments showed that ganglionic transmission is facilitated in cooling to 28°C. There is likewise increased content of adenosinetriphosphate (ATP) and phosphocreatine (PC) in the superior cervical ganglion, while the content of inorganic phosphorus remains almost the same. The ganglionic transmission is hindered in cooling to 25°C. However, the content of ATP and PC is increased in comparison with normal conditions, while the content of inorganic phosphorus is decreased or remains unchanged. The ganglionic transmission is hindered in introduction of ATP in the dose of 1 to 2 mg/kg of the body weight in conditions of cooling. Cooling of animals down to the temperature of 15 to 20°C is connected with decrease of phosphorus fractions and inhibition of ganglionic transmission up to complete block. |
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