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  • 1
    Electronic Resource
    Electronic Resource
    Springer
    Cellular and molecular life sciences 40 (1984), S. 70-73 
    ISSN: 1420-9071
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Notes: Summary The intensity of sound-induced convulsions in the genetically epilepsy-prone rat (GEPR) was reduced in a dose related fashion by intracerebroventricular administration of dobutamine, (β1 agonist), terbutaline (β2 agonist) or phenylephrine (α1 agonist). BHT-920 (α2 agonist) did not cause a dose-related decrease in sound-induced convulsion intensity. Binding studies showed that whole brain α and β receptor densities (Bmax) were normal while the Kd was increased for the β ligand in GEPR brain.
    Type of Medium: Electronic Resource
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  • 2
    Electronic Resource
    Electronic Resource
    [S.l.] : American Institute of Physics (AIP)
    Journal of Applied Physics 65 (1989), S. 596-599 
    ISSN: 1089-7550
    Source: AIP Digital Archive
    Topics: Physics
    Notes: A photoluminescence, photocapacitance, and thermal annealing study of Ga-rich GaAs has revealed the complex behavior of acceptor levels at 68–77 and 200 meV above the valence band. The concentration of all levels is enhanced by Ga-rich growth conditions, however, only the 77- and 200-meV levels formed preferably in n-type GaAs are consistent with a double-acceptor model of the gallium antisite defect. In p-type GaAs the 68-meV level associated with a different single-acceptor defect is dominant. It is argued that the inhibited formation of double-acceptor GaAs defects in p-type crystals is caused by the Fermi-energy control of the defect formation.
    Type of Medium: Electronic Resource
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  • 3
    Electronic Resource
    Electronic Resource
    Springer
    Neurological sciences 16 (1995), S. 91-99 
    ISSN: 1590-3478
    Keywords: GEPR ; Genetically Epilepsy-Prone Rats ; seizures ; epilepsy ; forebrain seizure ; brainstem seizure ; electroencephalography
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Description / Table of Contents: Sommario Due ceppi indipendenti di ratti geneticamente suscettibili ad epilessia (GEPRs) sono stati ottenuti mediante reincroci. GEPR-3s e GEPR-9s differiscono per il grado di predisposizione alle crisi della loro espressione rispettivamente moderato e importante. La predisposizione alle crisi stabilisce una distinzione fondamentale tra cervello normale ed epilettico. Sia nei GEPRs che nell'uomo la predisposizione alle crisi riguarda sia le crisi spontanee sia il grado di responsività o la soglia di risposta a stimoli che possono causare crisi anche in soggetti non epilettici. L'attivazione di circuiti epilettogeni del tronco da parte dell'input uditivo, attraverso il collicolo inferiore, provoca nei GEPR-9s risposte elettrografiche e comportamentali che riproducono le crisi generalizzate tonico-cloniche dell'uomo. L'attivazione dei circuiti epilettogeni del tronco da parte di circuiti epilettogeni proencefalici nei GEPRs rappresenta un modello recentemente individuato di crisi parziali complesse con generalizzazione secondaria a crisi tonico-cloniche. Per questi motivi la predisposizione epilettica nei GEPRs rappresenta una opportunità privilegiata per lo studio delle epilessie umane non riscontrabile in studi sul cervello normale esposto a stimoli epilettogeni.
    Notes: Abstract Two independently inbred strains of genetically epilepsy-prone rats (GEPRs) have been developed. GEPR-3s and GEPR-9s have moderate and severe degrees of seizure predisposition as well as expression, respectively. Seizure predisposition is a fundamental distinction between the normal and epileptic brain. Seizure predisposition in GEPRs and in humans with epilepsy includes spontaneous seizures and exaggerated seizure responsiveness and/or abnormally low thresholds to stimuli which also cause seizures in non-epileptic subjects. Activation of brainstem seizure circuitry by auditory input via the inferior colliculus causes electrographic and behavioral responses in GEPR-9s which replicates human generalized tonic/clonic seizures. Activation of brainstem seizure circuitry by input from forebrain seizure circuitry in GEPRs provides a newly discovered model of complex partial seizures with secondary generalization to tonic/clonic seizures. Thus, seizure predisposition in GEPRs offers a unique opportunity to study the human epilepsies that is not offered in studies of normal brain exposed to convulsant stimuli.
    Type of Medium: Electronic Resource
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  • 4
    ISSN: 1432-0649
    Keywords: PACS: 32.80.Rm; 34.50.Fa
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Type of Medium: Electronic Resource
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