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  • 1
    Electronic Resource
    Electronic Resource
    Springer
    Experimental brain research 38 (1980), S. 363-373 
    ISSN: 1432-1106
    Keywords: Passive movements ; Cerebellar cortex ; Climbing fiber input ; Purkinje cells
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Summary Discharges of Purkinje cells (PCs) with simple (SS) and complex spikes (CS) in the c1zone of lobule Vc of the anterior lobe of the cerebellar cortex were analyzed in the decerebrate cat during a passive movement of the cat forepaw. The CS of the PC responded differentially and/or proportionally to the position of the extremity, amplitude of the movement, velocity and acceleration. Inphase and outphase responses of the climbing fiber (CF) system to sinusoidal movements could depend on the position of the extremity within the operational range. From these results we deduce that peripheral events can be signalled by the CF system. The possible function of the interaction between the two inputs at the PC level is discussed.
    Type of Medium: Electronic Resource
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  • 2
    ISSN: 1432-2013
    Keywords: Cerebellärer Kortex ; Lernen am Erfolg ; Licht-Dunkelheit-Diskrimination ; Cerebellum ; Instrumental Conditioning ; Light-Dark Discrimination
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Description / Table of Contents: Summary Ten adult cats were used as subjects in a study which was designed to investigate the effects of cortical ablations of the cerebellar hemispheres upon learning and retention of a light-dark discrimination task. The discrimination task was instrumentally conditioned in food-deprived cats. The results of this study showed that unilateral or bilateral ablations of the cerebellar hemispheres have no effects upon retention of a learned discrimination task. The data further indicated that bilateral ablations of the cerebellar hemispheres seem to retard learning of a discrimination task during the first 5 days of the learning period. This latter effect was interpreted to be due to a dynamic period of compensation, during which, asCarrea andMettler [3] assumed, the cerebral cortex takes over the functions of the ablated parts of the cerebellum.
    Notes: Zusammenfassung Zehn Katzen wurden als Versuchstiere in einem Experiment benutzt, welches die Einflüsse der Entfernung der corticalen cerebellären Hemisphären auf das Erlernen und Behalten einer Licht-Dunkelheit Diskrimination untersuchte. Die Diskriminationsaufgabe wurde bei hungrigen Katzen nach der Skinner Methode durchgeführt. Die Ergebnisse dieser Studie zeigten, daß unilaterale oder bilaterale Entfernungen der cerebellären corticalen Hemisphären keinen Einfluß auf das Behalten der erlernten Diskriminationsaufgabe hatten. Dagegen schien die bilaterale Entfernung der cerebellären corticalen Hemisphären das Erlernen der Diskriminationsaufgabe zu verzögern, besonders während der ersten 5 Tage der Lernperiode. Es wurde angenommen, daß dieser einfluß auf einer dynamischen Kompensationsperiode beruht, während der, wieCarrea undMettler [3] vermuteten, der cerebrale Kortex die Funktion der entfernten Teile des Kleinhirns übernimmt.
    Type of Medium: Electronic Resource
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