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  • 1965-1969  (2)
  • Medial vestibular nucleus  (1)
  • Purkinje cells  (1)
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Year
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  • 1
    Electronic Resource
    Electronic Resource
    Monosynaptic inhibition of neck motoneurons by the medial vestibular nucleus (1969)
    Springer
    Experimental brain research 9 (1969), S. 365-380 
    Details
    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
    URL: http://dx.doi.org/10.1007/BF00235245
    Library Location Call Number Volume/Issue/Year Availability
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    Paper (German National Licenses)
    Fulltext
  • 2
    Electronic Resource
    Electronic Resource
    The origin of cerebellar-induced inhibition of Deiters neurones I. Monosynaptic initiation of the inhibitory postsynaptic potentials (1966)
    Springer
    Experimental brain research 2 (1966), S. 330-349 
    Details
    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
    URL: http://dx.doi.org/10.1007/BF00234779
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
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