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  • Title: Convulsive and nonconvulsive epilepsy in rats: effects on behavioral response to novelty stress.
    Author: Midzyanovskaya IS, Shatskova AB, Sarkisova KY, van Luijtelaar G, Tuomisto L, Kuznetsova GD.
    Journal: Epilepsy Behav; 2005 Jun; 6(4):543-51. PubMed ID: 15907748.
    Abstract:
    Behavioral response to a new environment of Wistar and WAG/Rij rats with absence and/or audiogenic seizures (AGSs) was investigated. Behavior was observed in open-field (OF) and light-dark choice (LD) tests. Correlations of test performance with seizure parameters were evaluated. AGS-susceptible Wistar rats exhibited reduced exploration (rearing) in both tests and a tendency toward hyperlocomotion in the OF test. Genetically absence-epileptic WAG/Rij rats demonstrated agitation (increased vertical/horizontal locomotion, enhanced defecation/urination) in the LD test, whereas they exhibited reduced exploration, increased grooming, and hyperlocomotion in the OF test. Anxiety level, as estimated by grooming time in the OF test and latency to first "risk assessment" in the LD test, correlated positively with the propensity for absence seizures in WAG/Rij rats not susceptible to AGSs. It can be concluded that the behavioral response to novelty stress in epileptic subjects depends on the type and severity of seizures.
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