Abstract
Wistar rats, made diabetic by intravenous administration of alloxan, 40 mg/kg, were submitted to amygdala kindling. The EEG and behavioral responses elicited by stimulating the amygdala nuclei in these animals were compared with those observed in control rats. Alloxan-treated rats required more stimulation to kindle, had increased duration of afterdischarges (AD), presented intense interictal spiking, and exhibited greater number of wet-dog shakes than controls. Although the AD threshold was not different between control and experimental rats, the above results seem to indicate an increase in the local epileptic susceptibility represented by longer ADs. On the other hand, this increased local discharge seems to be unable to access the generalization mechanism, which can be verified by the increased kindling rate. Hyperosmolarity, pH alterations, or other generalized metabolic changes frequently associated with diabetes could be implicated in these results.
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