after a na+ or ca++ sensitive site was identified by perfusion at 50 mul/min of an artificial csf containing 10.4 mm excess ca++ ions or 13.6 mm excess na+ ions , several types of experiments were undertaken with the results summarized as follows : if the cat was exposed to a cold or warm environmental temperature as the posterior hypothalamus was perfused with excess cation , the typical hypothermia was produced by ca++ and hyperthermia by na+ ions .
C0007447
cation
C0022023
ions