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Human temporal lobe epilepsy is associated with complex partial seizures that can produce secondarily generalized seizures and motor convulsions. In some patients with temporal lobe epilepsy, the seizures and convulsions occur following a latent period after an initial injury and may progressively increase in frequency for much of the patient's life.(More)
When neuronal excitability is increased in area CA3 of the hippocampus in vitro, the pyramidal cells generate periodic bursts of action potentials that are synchronized across the network. We have previously provided evidence that synaptic depression at the excitatory recurrent collateral synapses in the CA3 network terminates each population burst so that(More)
Mossy fiber reorganization has been hypothesized to restore inhibition months after kainate-induced status epilepticus. The time course of recovery of inhibition after kainate treatment, however, is not well established. We tested the hypothesis that if inhibition is decreased after kainate treatment, it is restored within the first week when little or no(More)
This report examines several concepts concerning the latent period to the first convulsive seizure, subsequent increases in seizure frequency, and possible mechanisms of epileptogenesis after kainate-induced status epilepticus. Previous data concerning the latent period and seizure progression from intermittent and continuous behavioral monitoring are(More)
Interictal spikes are periodic, very brief bursts of neuronal activity that are observed in the electroencephalogram of patients with chronic epilepsy. These spikes are useful diagnostically, but we do not know why they are so strongly associated with the spontaneous seizures that characterize chronic epilepsy. Interictal spikes appear before the first(More)
Animal models of injury-induced epilepsy may provide insight into the mechanisms of acquired epilepsy. Previous animal models of temporal lobe epilepsy (TLE) were produced by acute treatments that often have high mortality rates and/or are associated with a low proportion of animals developing spontaneous, chronic motor seizures. In this unit, a protocol is(More)
BACKGROUND Mothers' self-reported stroking of their infants over the first weeks of life modifies the association between prenatal depression and physiological and emotional reactivity at 7 months, consistent with animal studies of the effects of tactile stimulation. We now investigate whether the effects of maternal stroking persist to 2.5 years. Given(More)
Chronic epilepsy, as a consequence of status epilepticus, has been studied in animal models in order to analyze the cellular mechanisms responsible for the subsequent occurrence of spontaneous seizures. Status epilepticus, induced by either kainic acid or pilocarpine or by prolonged electrical stimulation, causes a characteristic pattern of neuronal death(More)
Kainate treatment in rats can result in a chronic behavioral state that is similar to human temporal lobe epilepsy. We tested the hypothesis that, like some humans with epilepsy, rat with kainate-induced epilepsy have more spontaneous motor seizures during inactivity (i.e. little to no volitional movement, including apparent sleep) than during activity(More)
Oxidative stress and mitochondrial dysfunction are acute consequences of status epilepticus (SE). However, the role of mitochondrial oxidative stress and genomic instability during epileptogenesis remains unknown. Using the kainate animal model of temporal lobe epilepsy, we investigated oxidative mitochondrial DNA (mtDNA) damage and changes in the(More)