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  • 1
    Electronic Resource
    Electronic Resource
    Springer
    Experimental brain research 14 (1971), S. 95-104 
    ISSN: 1432-1106
    Keywords: GABA ; Strio-nigral neurons ; Elongated synaptic vesicles ; Hemitransection ; Bouton-degeneration
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Summary Interference with the neuronal connection between the substantia nigra and striatum of rat by hemitransection at the subthalamic level or lesion of left side of striatum by a simple suction method was studied in relation to the concentration of γ-aminobutyric acid (GABA) in both regions. Time interval studies, at two, six, and twelve days after hemitransection, showed that the GABA concentration in substantia nigra had markedly decreased, whereas only a slight change was shown on the striatum of the operated side. Destruction of the striatum by suction caused a significant fall of the GABA content in the ipsilateral side of substantia nigra. However, destruction of the frontal cortex alone did not cause any marked change in the GABA content of the substantia nigra. In addition, electron microscopic studies disclosed that within the synaptic organization of the substantia nigra approximately 20 % of the boutons contained elongated synaptic vesicles, and that, following coagulation of the striatum, some large axosomatic terminals containing elongated synaptic vesicles also underwent degeneration.
    Type of Medium: Electronic Resource
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  • 2
    Electronic Resource
    Electronic Resource
    Springer
    European archives of psychiatry and clinical neuroscience 232 (1982), S. 33-38 
    ISSN: 1433-8491
    Keywords: Phosphatidylcholine ; Glutamate ; GABA ; Brain ; CSF ; Friedreich's ataxia ; Phosphatidylcholin ; Glutamat ; GABA ; ZNS ; Liquor cerebrospinalis ; Friedreichsche Ataxie
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Description / Table of Contents: Zusammenfassung Um zu untersuchen, ob die Gabe von Phosphatidylcholin, die den zentralnervösen Azetylcholingehalt erhöht, einen Einfluß auf die Neurotransmitter Glutamat und GABA hat, wurde 17 von 32 Ratten über 14 Tage 1,5g/kg Lethicon® pro die peroral gegeben. Die fluorometrische Messung der Konzentrationen von Glutamat und GABA in frontalem Cortex, Striatum, Nigra, Kleinhirnrinde sowie von Glutamat im Liquor cerebrospinalis ließ keine signifikanten Unterschiede gegenüber Kontrolltieren erkennen. Nach zweiwöchiger Gabe von Phosphatidylcholin konnte keine zentralnervöse Interaktion des cholinergen Systems mit den Neurotransmittern Glutamat und GABA nachgewiesen werden.
    Notes: Summary Phosphatidylcholine increases CNS concentrations of acetylcholine. In rats we investigated whether or not phosphatidylcholine also influences the neurotransmitters glutamate and GABA. In 17 rats 1.5g/kg Lethicon perorally was administered daily for 2 weeks, 15 rats served as controls. In tissue from frontal cortex, striatum, substantia nigra, cerebellar cortex no significant differences between treated and untreated animals were found in glutamate or GABA concentrations. A central nervous interaction between the cholinergic system and the neurotransmitters glutamate and GABA, therefore, could not be demonstrated after 2 weeks of phosphatidylcholine intake.
    Type of Medium: Electronic Resource
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  • 3
    Electronic Resource
    Electronic Resource
    Springer
    European archives of psychiatry and clinical neuroscience 232 (1982), S. 183-189 
    ISSN: 1433-8491
    Keywords: Ethanol ; Barbiturate ; Cortex ; GABA ; Glutamate ; Hippocampus ; Nigra ; Striatum ; Aethanol ; Barbiturat ; Cortex ; GABA ; Glutamat ; Hippocampus ; Nigra ; Striatum
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Description / Table of Contents: Zusammenfassung In zwei Versuchsserien wurde der Einfluß von chronischer Aethanolgabe (5 g/kg täglich) über 2 bzw. 4 Wochen auf die Neurotransmitter Glutamat und GABA bei Ratten untersucht. Dabei fand sich ein durch Barbiturat maskierter Anstieg der GABA-Konzentration in Striatum, Hippocampus und Substantia nigra, 8 bzw. 12 Stunden nach der letzten Aethanolgabe. Für Glutamat konnte ebenfalls ein Anstieg in den untersuchten Hirnregionen gefunden werden, der mit den für Dopamin bekannten Veränderungen unter Aethanol vereinbar ist. Die Bedeutung für die Pathogenese hirnorganischer Anfälle und psychotischer Symptome nach chronischem Alkoholmißbrauch wird diskutiert.
    Notes: Summary The effect of chronic ethanol administration, 5 g/kg per day for 2 or 4 weeks, on the neurotransmitters glutamate and GABA was investigated in rats. An increase in GABA was found in the striatum, hippocampus, and substantia nigra, 8 or 12 h after the last ingestion of ethanol, this being masked by injection of barbiturate. In addition an increase of glutamate has been found in the examined brain areas. This is consistent with the known effect of ethanol on brain Dopa metabolism and release. Finally, the relevance of the results for the pathogenesis of withdrawal seizures and delirious states is discussed.
    Type of Medium: Electronic Resource
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