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  • 1
    Electronic Resource
    Electronic Resource
    Springer
    Experimental brain research 2 (1966), S. 330-349 
    ISSN: 1432-1106
    Keywords: Deiters neurones ; IPSP ; Monosynaptic ; Purkinje cells ; Inhibitory neurones
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Summary During stimulation of the anterior lobe of the cerebellum, postsynaptic potentials were recorded intracellularly from ipsilateral Deiters neurones of the cat. In the majority of examined cells, the inhibitory postsynapic potentials were induced with short latency; 1.06 msec on the average from lobule III or IV. The latency was longer (1.23 msec) when the lobule V was stimulated, while it was shorter (0.86 msec) from the juxtafastigial region. It follows that the IPSP was produced via a monosynaptic pathway at a conduction velocity of 15 to 20 m/sec. Recording of the extracellular field potentials and focal stimulation within and around Deiters' nucleus further indicated that the inhibitory impulses propagated out of the cerebellum along a remarkable bundle of fibres which terminated within Deiters' nucleus. These results are all explicable by assuming that the cerebellar Purkinje cells are inhibitory in nature and so produce IPSPs monosynaptically in Deiters neurones via the long corticofugal fibres. Monosynaptic EPSPs were also detected in some Deiters neurones. They are considered to be mediated by the other pathways formed of axon collaterals of the cerebellar afferents.
    Type of Medium: Electronic Resource
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  • 2
    Electronic Resource
    Electronic Resource
    [s.l.] : Nature Publishing Group
    Nature 218 (1968), S. 367-368 
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] This cytogenetic study was designed to evaluate the sensitivity to radiation of human germ cell chromosomes, on the assumption that subtle but detectable chromosomal rearrangements induced in the meiotic chromosomes of an exposed parent would be reflected in the somatic cells of the progeny, even ...
    Type of Medium: Electronic Resource
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  • 3
    Electronic Resource
    Electronic Resource
    Springer
    Experimental brain research 9 (1969), S. 365-380 
    ISSN: 1432-1106
    Keywords: Medial vestibular nucleus ; Neck motoneurons ; Monosynaptic IPSP
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Summary Stimulation of the brain stem in cats anesthetized with pentobarbital evoked short-latency IPSPs in many neck motoneurons. From the segmental delay of these IPSPs, and from comparison of their latencies with those of monosynaptic EPSPs evoked in the same motoneuron population by stimulation of the brain stem, it is concluded that the IPSPs are monosynaptic and are produced by descending inhibitory fibers. As many as thirteen electrodes were inserted into the medulla and pons to compare threshold stimuli required to evoke monosynaptic IPSPs from different locations. The points with the lowest threshold were in the medial vestibular nucleus and the medial longitudinal fasciculus. The IPSPs are apparently produced by fibers that originate in the medial vestibular nucleus and reach the upper cervical segments via the MLF. Electrical stimulation of the ipsilateral labyrinth often produces disynaptic IPSPs in neck motoneurons, very probably by means of a relay in the medial nucleus. This inhibitory pathway between labyrinth and neck motoneurons, together with the previously described excitatory pathway relaying in Deiters' nucleus, provides some of the pathways utilized by the labyrinth in regulation of head position.
    Type of Medium: Electronic Resource
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  • 4
    Electronic Resource
    Electronic Resource
    Springer
    Cellular and molecular life sciences 22 (1966), S. 331-332 
    ISSN: 1420-9071
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Notes: Résumé L'activité électrique des neurones du faisceau pyramidal est étudiée ici chez des chats anesthésiés au Nembutal au moyen d'un enregistrement intracellulaire. La stimulation du noyau ventral latéral thalamique induit un potentiel postsynaptique excitateur (EPSP) monosynaptique et la stimulation du brachium conjunctivum induit un EPSP disynaptique dans les neurones pyramidaux de conductibilité rapide.
    Type of Medium: Electronic Resource
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  • 5
    Electronic Resource
    Electronic Resource
    Springer
    Cell & tissue research 88 (1968), S. 138-144 
    ISSN: 1432-0878
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Description / Table of Contents: Zusammenfassung Je drei sympathische und parasympathische Ganglien des Goldhamsters wurden elektronenmikroskopisch vergleichend untersucht. Folgende Befunde wurden erhoben: 1. Freie Ribosomen und Ergastoplasma erscheinen in den Perikaryen sympathischer Ganglienzellen deutlicher inselförmig geordnet als in denen parasympathischer Zellen. 2. Granula vom Typus der Katecholaminkörnchen kommen in den parasympathischen Ganglienzellen und in den sympathischen Ganglienzellen in annähernd gleicher Form und Zahl vor; sie entstehen offenbar im Golgiapparat. Auch in den Synapsen der parasympathischen und sympathischen Ganglien treten Granula vom Typus der Katecholaminkörnchen auf. Das Ganglion ciliare zeichnet sich jedoch durch Armut an derartigen Granula aus. 3. In den parasympathischen Ganglien des Goldhamsters kommen markhaltige Nervenfasern häufiger als in sympathischen Ganglien vor. Die vergleichende Untersuchung läßt somit keine wesentlichen Unterschiede in der Ultrastruktur sympathischer und parasympathischer Neurone der untersuchten Species erkennen.
    Notes: Summary Three different ganglia each of the sympathetic and the parasympathetic nervous sytem of Syrian golden hamsters were comparatively investigated by means of electron microscopy. 1. It appears that in the perikarya ergastoplasm and free ribosomes are distributed in islet-like formations more distinctly within the sympathetic neurons than in the parasympathetic neurons. 2. Granules of the so called catecholamine-type exist in both sympathetic and parasympathetic neurons in comparable size and number, except for the ciliary ganglion in which they occur very rarely. They originate evidently in the Golgi apparatus. Similar granules occur also in the synapses of the sympathetic and the parasympathetic ganglia. 3. Myelinated nerve fibers are more abundant in the parasympathetic than in the sympathetic ganglia of the golden hamster. Thus, the comparative examination does not show essential ultrastructural differences between sympathetic and parasympathetic neurons in the species investigated.
    Type of Medium: Electronic Resource
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