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Long-term changes in entorhinal-dentate evoked potentials induced by electroconvulsive shock seizures in rats
W M Burnham1, G A Cottrell, D Diosy
1Bloorview Epilepsy Program, University of Toronto, Ont., Canada.
Brain Research
|November 6, 1995
Abstract:
Entorhinal-dentate evoked potentials were measured in rats before and after: (1) eight electroconvulsive shock (ECS) seizures, or (2) matched handling. In animals that received ECS, evoked potentials were significantly enhanced, as evidenced by a long-lasting increase in the amplitude of the population spike. This increase in population-spike amplitude lasted for at least 3 months after the last ECS trial. No evoked-potential changes were observed in the subjects that received matched handling. These data suggest that ECS seizures produce long-lasting, perhaps permanent, changes in the brain.