Zusammenfassung
18 Katzen wurden als Versuchstiere in einem Experiment benutzt, welches den Einfluß der bilateralen Entfernung des corticalen Teils der cerebellären Hemisphären auf das Erlernen einer Licht-Dunkelheit-Diskrimination untersuchte. Von der operierten Kontrollgruppe (8 Tiere) wurden 5 zwei Wochen und 3 drei Wochen nach der Operation getestet. Von der experimentellen Gruppe (10 Tiere) wurden 4 zwei Wochen und 6 drei Wochen nach der Operation getestet. Die Diskriminationsaufgabe bestand aus Hebeldrücken nach der Skinner-Methode. Die Ergebnisse zeigten, daß die experimentellen Tiere fast während der ganzen Lernperiode (23 Tage) weniger Diskriminationsvermögen aufweisen als die Kontrolltiere. Es wurde vermutet, daß dieser Unterschied zwischen den experimentellen Tieren und den Kontrolltieren darauf beruht, daß die Entfernung eines Teils des cerebellären Cortex die Verbindungen zu Strukturen, die bei dem Habituationsprozeß eine Rolle spielen, stört.
Summary
Eighteen cats were used as subjects in a study which investigated the effects of bilateral cortical cerebellar hemispheric ablations upon light-dark discrimination learning. From the operated control group (8 animals), 5 were tested two weeks and 3 three weeks postoperatively. From the experimental group (10 animals) 4 were tested two weeks and 6 three weeks postoperatively. The discrimination task consisted of an instrumentally conditioned bar-pressing response. The results showed that almost during the entire 23-day learning period, the experimental cats performed more poorly on the discrimination task than their controls. It is hypothesized that the difference between the two groups of animals derives from the disturbance (caused by the ablation) of the connections between the cerebellum and other structures involved in the habituation process.
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Mit Unterstützung der Deutschen Forschungsgemeinschaft.
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Davis, H.N., Watkins, G.M., Angermeier, W.F. et al. The role of the cortical parts of the cerebellar hemispheres in discrimination learning of cats. Pflugers Arch. 318, 346–352 (1970). https://doi.org/10.1007/BF00586974
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DOI: https://doi.org/10.1007/BF00586974