Cerebral extracellular calcium activity in severe hypoglycemia : Relation to extracellular potassium and energy state
The changes in extracellular Ca2+ (Cae) and K+ (Ke) activities were studied in the rat brain during insulin-induced hypoglycemia. At about the time of onset of isoelectric EEG in severe insulin-induced hypoglycemia (300-g male Wistar rats under 70% N2O anaesthesia), there was an increase in Ke which, at ∼13 mM, was associated with a fall in Cae. Ke peaked at 48 ± 12 mM, and Cae at 0.18 ± 0.28 mM.
