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Biomedical subjects

T Radil

Publications and source records attributed to T Radil.

At least 37 records · Page 2Linked to original sources
PubMed1991

Some neuropsychological and psychological parameters in children with minimal brain dysfunction: a transcultural comparison.

Performances of groups of second grade elementary school boys with Minimal Brain Dysfunction (ns = 34) and matched with normal boys (ns = 30) were studied using mostly psychometric criteria in Prague, Czechoslovakia and Skopje, Macedonia. Boys with brain dysfunctions scored more poorly than normal ones at both places, but normal boys from both cultures did not differ. Information-processing capability (derived from Wechsler scale) was lower and its rank among disordered features higher among Skopje boys, probably because organized care for minimal brain dysfunctioning children was relatively lower.

Achievement↗
PubMed1991

Correlations between symbolic motor performance and achievement in school for children with minimal brain dysfunction.

Significant correlations were found between grades for reading, writing, and calculating and each child's individual mean reaction time for symbolic motor performance tasks with letters and numbers as stimuli for 240 elementary school boys with minimal brain dysfunction and in first to fourth classes in Prague (Czechoslovakia) and Skopje (Yugoslavia). For age(class)-matched groups of 382 healthy boys the correlations disappeared by the age of ten years. Similar results were noted for groups of boys in both cities.

Achievement↗
PubMed1991

Sensorimotor synchronization: motor responses to regular auditory patterns.

Subjects (N = 32) were asked to synchronize a motor response with tones in auditory patterns. These patterns were created from six tones and six intertone intervals of equal duration. The pitch of the first tone differed from the others. It was found that subjects used three types of timing in their motor response: (1) the first intertone interval was prolonged and the second interval was shortened, (2) the second intertone interval was prolonged and the first interval was shortened, and/or (3) the first interval and the second interval were of approximately the same length. The prolongation of the fifth interval was observed during all three types of timing. The results are explained using the concept of suprasegmental control of timing, which explains a prolongation of intervals at critical control point of the patterns. The occurrence of three different strategies of timing is discussed in connection with similar principles in musical performance.

Acoustic Stimulation↗
PubMed1991

Cardiac frequency, phase and errors in one-dimensional sensorimotor tracking.

One dimensional manual tracking was investigated in relation to actual heart rate and phase of cardiac cycle. Higher heart rate was combined with increased tracking error incidence and decreased successful tracking time (light spot inside target). Error incidence was time-locked with respect to the phase of cardiac cycle.

Electrocardiography↗
PubMed1990

[Laufberger's excitation theory].

The author gives an account of V. Laufberger's Excitation theory at the occasion of the 100th anniversary of his birthday. This work was published as a monograph in 1947 and contains many data which foresee the further development of neuro-sciences and other scientific disciplines. From a certain aspect it is more cybernetic than Wiener's "Cybernetics" published one year later. It applies in a genial way the principle of logical elements made up of binary functional elements, backfeeds, parallel organization of neuron networks, and memories based on so-called spinning excitations. It is the first modern model of cerebral activity. It combines within one system the neuron and psychic level of organization of the brain.

Cybernetics↗
PubMed1990

Stimulus anticipation in following rhythmic acoustical patterns by tapping.

Subjects followed rhythmic acoustical sequences by finger-tapping. Tapping onset preceded stimulus onset by a value close to 30 ms. It is suggested that this temporal difference might correspond to one cycle of a hypothetical timing mechanism in the brain which has been observed with other experimental paradigms.

Auditory Perception↗