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V Kuthan

Publications and source records attributed to V Kuthan.

16 recordsLinked to original sources
PubMed1991

Contributions to the history of psychology: LXXXIII. J.E. Purkinje and Mathias Klotz: who first described "the phenomenon"?

In 1825 Purkinje described the effects of increasing ambient illumination at early dawn, beginning with darkness, on the perception of spectral colors. The blues were seen first. When reds became visible, they appeared less bright than the blues. The usually dependable Brockhaus Encyclopedia stated (1972) that the phenomenon was described in 1816 by Mathias Klotz and rediscovered ("erneut entdeckt") by Purkinje. As it turns out, Klotz correctly described the effects of low ambient illumination on the relative brightness but his report on visibility contradicts Purkinje's observations, amply confirmed by subsequent investigators and known, in fact, prior to Purkinje's report.

Color Perception↗
PubMed1990

[The practicum in physiology: from Laufberger to today].

An outline of Prof. Laufberger's concept of practical exercises in physiology, proposed just after the Second World War, is given. Especially, his new pedagogical approach is emphasized, here. Further, the development of the organization of practical courses in the Institute of Physiology in Prague is described: e.g. the modernization of the methods used, and of the educational process in early 70 s'. Today, the importance of biocybernetics is growing.

Czechoslovakia↗
PubMed1990

Contributions to the history of psychology: LXXI. "Purkinje phenomenon": the genesis and the early uses of the term in French, German, and English.

In an earlier note (Brozek, 1989) regret was expressed that Zusne's valuable book Eponyms in Psychology (1987) did not provide information on persons who coined the eponyms as well as on the time and place in which they were introduced into the scientific literature. The present report provides such information for the term "Purkinje phenomenon." In French it was used by J. Macé de Lepinay and W. Nicati in 1882, in Germany by Ewald Hering in 1895, and in English by J. B. Haycraft in 1897.

Color Perception↗
PubMed1987

Some contributions of I.E. Purkynĕ to the visual physiology.

In the research of binocular vision J. E. Purkynĕ pointed out the role of retinal corresponding areas. He observed binocular interaction of pressure phosphenes elicited in them and the fusion of images projected on the corresponding foveal areas even in eyes with artificial divergency. For the first time he proposed the examination of visual fields (perimetry) in several planes and he also introduced the colour perimetry. Purkynĕ analyzed profoundly the different functions of direct (foveal) and indirect (peripheral) vision. In indirect vision he anticipated the modern concept of the useful field of view. Of fundamental importance was Purkynĕ's research of the strategy and different types of ocular movements. In analysis of motion perception, he evolved the hypothesis of "general sense of space" which is very close to modern feed-back conception of "corollary discharge".

Czechoslovakia↗