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Biomedical subjects

P Jaśkowski

Publications and source records attributed to P Jaśkowski.

23 records · Page 2Linked to original sources
PubMed1984

Human reaction time to negative contrast stimuli.

Simple motor reaction time (RT) to 100 percent negative contrast stimuli was measured for various background luminances as well as after bleaching a fraction of retinal photopigments. RT decreased to asymptotical value with the increase of background intensity. The intensity-dependent portion of RT behaved identically for 100 percent positive and negative contrast. Moreover, RT to 100 percent negative contrast was extended by bleaching and falls down during the adaptation to the lower background luminance. The results were discussed on the basis of the Pulfrich latency researches.

Cues↗
PubMed1983

Distribution of the human reaction time measurements.

Simple motor reaction time to, visual stimuli in dependence of stimulus intensity was measured and the histograms representing the distribution of reaction time were constructed. It was found that the reaction time distributions are positively skewed for all stimulus intensities used. The mean value, the standard deviation as well as the coefficient of skewness increases as the stimulus intensity decreases.

Humans↗
PubMedDate not supplied

[Spontaneous Pulfrich's effect in patients with dysfunction of the optic nerve].

Twenty patients with various dysfunctions of the optic nerve were subjected to examinations by means of a test based on the Pulfrich's phenomenon. The Pulfrich's effect was observed in 18 among them. The survey of the phenomenon was continued in 5 patients in the course of the treatment. It was detected that the dimension of the spontaneous Pulfrich's illusion diminishes gradually tending towards norm. The results obtained assure us of the usefulness of the application of the Pulfrich's effect as a diagnostic test in ophthalmology and neurology.

Evoked Potentials, Visual↗