Actions of Hypoxia and Hypercapnia on Single Mammalian Neurons
The actions of oxygen deficiency on the bioelectrical activity of single neurons have been described in a number of papers (1–7, 9, 12). In these studies rather complex and sometimes even controversial neuronal responses were observed. Since a critical lowering of the pO2 evokes an insufficiency of circulation and consequently an increase of the pCO2, it may be assumed that the complex neuronal reactions are due partly to interactions of hypoxia and hypercapnia. This assumption was tested by intracellular recordings from moto- and interneurons in anesthetized and artificially ventilated rats and cats. In the experiments at first the isolated effects of hypoxia and hypercapnia were examined under continuous control of pO2 and pCO2 in blood and tissue. Subsequently the interactions of both effects were studied.
KeywordsIntracellular Recording Discharge Frequency Bioelectrical Activity Critical Lowering Complex Neuronal Network
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