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  • 1
    Electronic Resource
    Electronic Resource
    Eye movement related neurons in the cerebellar nuclei of the alert monkey (1982)
    Springer
    Experimental brain research 45 (1982), S. 253-264 
    Details
    ISSN: 1432-1106
    Keywords: Cerebellar nuclei ; Eye movements ; Nystagmus ; Saccades
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Summary In all cerebellar nuclei saccade related neurons can be recorded. In the alert untrained Rhesus monkey these neurons can be classified into short-lead bursters, complex bursters, and tonic burst neurons. Short-lead bursters can be related to the onset or to the length of saccades and blinks. Complex bursters are active in the early (acceleration) or late (deceleration) phase of saccades. Tonic burst neurons, in addition, display maintained activity which is modulated in a complex manner with eye position, during periods of fixation or slow-phase nystagmus. In agreement with clinical and previous experimental data we view these cerebellar output neurons as elements which are not part of the system which basically generates eye movements, but rather as a system which could influence the execution of movements.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00235785
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    Paper (German National Licenses)
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  • 2
    Electronic Resource
    Electronic Resource
    Habituation of the vestibulo-ocular reflex (VOR) in the monkey during sinusoidal rotation in the dark (1981)
    Springer
    Experimental brain research 41 (1981), S. 108-114 
    Details
    ISSN: 1432-1106
    Keywords: Vestibulo-ocular-reflex ; Habituation ; Monkey ; Nystagmus ; Sinusoidal rotation
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Summary In experimentally naive monkeys the horizontal vestibulo-ocular-reflex (VOR) has a time constant which is in the range of 40–60 s. It can be measured as the nystagmus decline after pulses of angular acceleration, or from the transfer functions obtained from sinusoidal rotation with different frequencies. When frequencies below 0.1 Hz are applied, sinusoidal rotation leads to a pronounced phase advance, a decrease in gain and a shortening of the pre- and post-rotatory nystagmus time constant. Even very low frequencies (e.g., 0.002 Hz) are effective where the phase advance of eye relative to head velocity is already 90 ° in the naive animal. Exposing the animal to stimulation only at a single frequency shifts the whole frequency curve towards a greater phase advance. These results are consistent with habituation experiments in which steps of angular velocity have repeatedly been applied. In these experiments nystagmus duration is shortened, whereas the initial response at the end of acceleration does not change. This corresponds to a phase shift and a gain reduction in the low frequency range (below 0.1 Hz) which we have also observed during sinusoidal rotation.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00236599
    Library Location Call Number Volume/Issue/Year Availability
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    Paper (German National Licenses)
    Fulltext
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