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  • 1980-1984  (3)
  • Audio-ocular responses  (1)
  • Optokinetic  (1)
  • associated solvents  (1)
  • 1
    Electronic Resource
    Electronic Resource
    Re-interpretation of the solvent dielectric constant in coordination chemical terms (1983)
    Springer
    Journal of solution chemistry 12 (1983), S. 135-152 
    Details
    ISSN: 1572-8927
    Keywords: Dielectric constant ; empirical solvent parameters ; associated solvents ; solvent-reactivity correlations
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Notes: Abstract It is found for common aprotic solvents that the logarithm of the dielectric constants can be represented by a linear combination of the acceptor numbers (AN) and the donor numbers (DN) (or equivalent parameters), $$log \in = c_1 ({\rm A}{\rm N}){\text{ }} + {\text{ }}c_2 (DN){\text{ }} + {\text{ }}c_3 $$ With this equation, concepts of specific and non-specific solvation are brought under the umbrella of one treatment. The equation does not hold for the highly structured solvents. For these, the dielectric constants predicted on the basis of the acceptor and donor numbers are orders of magnitude larger than the experimental values, revealing how poorly the associates are dissociated by the macroscopically attainable electric fields.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00645354
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    Paper (German National Licenses)
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  • 2
    Electronic Resource
    Electronic Resource
    Influence of otolithic stimulation by horizontal linear acceleration on optokinetic nystagmus and visual motion perception (1980)
    Springer
    Experimental brain research 39 (1980), S. 165-176 
    Details
    ISSN: 1432-1106
    Keywords: Vestibular system ; Optokinetic ; Otoliths ; Eye movements ; Motion perception
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Summary Several studies in the past have demonstrated the existence of an Otolith-Ocular Reflex (OOR) in man, although much less sensitive than canal ocular reflex. The present paper 1 confirms these previous results. Nystagmic eye movements (L-nystagmus) appear in the seated subject during horizontal acceleration along the interaural axis in the dark for an acceleration level (1 m/s2) about ten times the perception threshold with a sensitivity of about 0.035 rad/m. When sinusoidal linear acceleration is combined with optokinetic stimulation, the recorded nystagmus slow phase velocity exhibits strong periodic modulation related to subject motion. This marked effect of linear acceleration on the optokinetic nystagmus (OKN) appears at a level (0.1 m/s2) close to the acceleration perception threshold and has a 4-fold higher sensitivity than L-nystagmus. Modulation of OKN can reach a peak-to-peak amplitude as great as 20 °/s; for a given optokinetic field size it increases with the velocity of the optokinetic stimulus, i.e. with the slow phase eye velocity. In parallel with changes in OKN slow phase velocity, linear acceleration induces a motion related decrease in the perceived velocity of the visual scene and modifications in selfmotion perception. The results are interpreted in terms of a mathematical model of visual-vestibular interaction. They show that sensory interaction processes can magnify the contribution given to the control of eye movements by the otolithic system and provide a way of exploring its function at low levels of acceleration.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00237547
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    Paper (German National Licenses)
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  • 3
    Electronic Resource
    Electronic Resource
    Saccadic responses evoked by presentation of visual and auditory targets (1982)
    Springer
    Experimental brain research 47 (1982), S. 417-427 
    Details
    ISSN: 1432-1106
    Keywords: Saccades ; Audio-ocular responses ; Fixation ; Sound localization
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Summary Saccadic eye movements evoked by the presentation of visual and auditory targets were examined and compared. Differences were found either in the pattern of the saccadic response and in the characteristics of single saccades of the same amplitude. The longer latency and the higher percentage of multiple saccade responses in the auditory case were attributed to a more complex central processing, whereas the longer duration and the lower peak velocity of the saccades to auditory targets were attributed to reduced performances of the execution mechanism in the absence of vision.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00239359
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    Paper (German National Licenses)
    Fulltext
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