Abstract
We describe the ontogeny of feline temporal lobe epilepsy after amygdala kindling in 24 cats, aged 2.5 months to over 1 year. In so doing, we report the first experimental model of spontaneous epilepsy in immature animals. Preadolescent kittens ( n = 12 ⩽ 6.5months) are far more likely to develop epilepsy, indexed by spontaneous seizures, than are adult cats ( n = 12 > 1year). Moreover, youth accelerated the development of epilepsy. The younger the kitten at the beginning of kindling, the more probable and rapid the onset of spontaneous seizures. Failed postictal depression was the most reliable precursor of spontaneous seizures in immature cats. However, spontaneous epilepsy continued after postictal refractory periods stabilized and was still present when kittens matured to adulthood. Collectively, the results suggest that failed inhibition contributes to the onset of spontaneous epilepsy in immature animals but that other morphologic, physiological and/or chemical changes might sustain epilepsy afterwards.
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