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  • 1
    Electronic Resource
    Electronic Resource
    Possible use of an analgesic (fentanyl) during electrophysiological investigations of the cerebellar cortex (1979)
    Springer
    Neurophysiology 11 (1979), S. 438-444 
    Details
    ISSN: 1573-9007
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Abstract The effect of the central analgesic fentanyl on evoked potentials and responses of single Purkinje cells in the cerebellar cortex to stimulation of the sensomotor cortex and of somatic nerves was investigated in unanesthetized cats. Injection of fentanyl in an analgesic dose (10–30 µg/kg, intravenously) had no appreciable effect on evoked potentials and led only to very slight changes in spontaneous activity and responses of Purkinje cells. As a rule fentanyl, in a dose of 30 µg/kg, depressed, but in a dose of 10 µg/kg, facilitated responses and spontaneous activity of Purkinje cells. This effect of fentanyl is negligible compared with the action of barbiturate anesthetics on responses of cerebellar cortical neurons. Consequently, fentanyl can be used for analgesia during electrophysiological investigations of the cerebellar cortex in unanesthetized cats.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01062840
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    Paper (German National Licenses)
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  • 2
    Electronic Resource
    Electronic Resource
    Effect of deafferentation of the anterior lobe of the cat cerebellum on background activity of Purkinje cells (1972)
    Springer
    Neuroscience and behavioral physiology 5 (1972), S. 132-138 
    Details
    ISSN: 1573-899X
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Notes: Abstract Background activity of Purkinje cells is compared in the intact cat cerebellar cortex and after deafferentation. Deafferentation causes a slight increase in frequency and regularity of discharge of the Purkinje cells, mainly through a decrease in the percentage of long interspike intervals. Consequently, incoming afferent impulses exert a mainly inhibitory effect on spontaneous activity of Purkinje cells. A study of interaction between neighboring Purkinje cells after deafferentation of the cerebellar cortex showed that they mutually inhibit each other. This effect is evidently mediated by recurrent axon collaterals of the Purkinje cells in the isolated cerebellar cortex; in contrast, with the intact cortex, no “complex” spikes of the Purkinje cells were observed.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01184621
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    Paper (German National Licenses)
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  • 3
    Electronic Resource
    Electronic Resource
    Two types of granular cells in the cerebellar cortex (1969)
    Springer
    Neurophysiology 1 (1969), S. 128-134 
    Details
    ISSN: 1573-9007
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Abstract We recorded the activity of two types of granular cells in the rostral folia of the paramedial lobe (the projection region of the front legs) of the cerebellar cortex in cats immobilized by administration of ditiline; these cells differed in their receptive fields, the characteristics of their reaction to single stimulation of somatic nerves, and the character of their background activity. The granular cells of the first type were excited only when the nerves of the front legs were stimulated (reacting with 1–3 impulses with a latent period of 8–20 msec) and were inhibited between 20–50 and 70–180 msec after stimulation of the nerves of any leg. The cells of the second type responded with volleys of 3–6 impulses with a latent period of 20–40 msec to stimulation of the nerves of all four legs. Comparison of the reactions of the granular cells and other neurons of the cerebellar cortex showed that the cells of the first type cause excitation of the Purkinje and Golgi cells and the neurons of the molecular layer. The granular cells of the second type have an excitatory effect on the Golgi cells. The differences in the reactions of the two types of granular cells result from the fact that they are selectively innervated by the mossy fibers of different afferent pathways. Comparison with the data in the literature enables us to surmise that the fibers of the cuneocerebellar tract terminate at granular cells of the first type, while the reticular fibers terminate at cells of the second type.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01063182
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    Paper (German National Licenses)
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