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Background. The functional integration (»binding«) of different brain areas, for example as a possible mechanism for stimulus perception, may be mediated by the synchronizing oscil­latory activity of neuronal populations, which can be determined by electroencephalographic coherence analysis. Visuomotor integration in a visuomotor task requires functional coop­eration between the motor and visual cortical areas. Unilateral limb movements are based on the … Preberite več >>

The endocardial surface and the volume of the left ventricle were determined experimentally by an original noninvasive method with the goal of understanding the mechanism of the influence of the change of left ventricle shape on the execution of its pumping function. The chore parameters were studied by echocardiography and ECG at the end of diastole and systole. Three groups … Preberite več >>

In spite of long term expectations of the discovery of heart natriuretic substance only nine years ago the atrial natriuretic peptide was discovered. Some essential data about structure, synthesis, secretion and effects of the peptide are given in the article The regulation of the synthesis and excretion is presented. Two groups of the structurally and functionally different peptide’s receptors are … Preberite več >>

Anatomy and physiology of nervous structures involved in temperature and pain perception, as well as single sensations, receptive structures and afferent nerve fibers are defined. Peripheral nerves and spinal cord contribution in these processes are briefly described, and the role of ascending tracts and cerebral cortex specified.… Preberite več >>

The paper surveys the physiological aspects of androgens. It describes in more detail synthesis of C19 steroids, their metabolism and transport, and presents serum salivary levels of individual androgens in males and females, in different time periods.… Preberite več >>

Small intestinal mucosa of rats was tested for the presence of estrogen receptors. For determination of estrogen receptors  3H-estradiol 17-beta binding assay with or with our excess 1H-estradiol 17-beta was used. Three sub cellular fractions including nuclei, microsomes and cytosol, were analyzed. Some animals were pretreated with 1H-estradiol in order to determine whether it induces an increase in specific binding … Preberite več >>

Tests of cardiovascular reflexes and heart rate variability are reliable and noninvasive and therefore useful in children with suspected autonomic nerve dysfunction. The aim of this study was to calculate normal reference values and investigate the relationship between car­diovascular reflex ratios, gender and age. A batery of cardiovascular tests was performed in 81 healthy children, aged 7 to 16 years. … Preberite več >>

The basics of visual evoked potentials are described. In the first part of the paper, the anatomical and physiological principles of the electrical activity recorded over the occipital cortex, the visual evoked potential recording technique, the characteristics of visual evoked potentials in healthy subjects and their interpretation are described. The second part deals with the visual evoked potential abnormalities and … Preberite več >>

The electroretinogram demonstrates a flash-evoked potentials of the retina recorded by surface electrodes. Electroretinography is a noninvasive and objective, yet nonstandardised examination technique, which has been in clinical use for number of years. The aim of this study was to record electroretinographic responses according to ISCEV standards, and to test a new laboratory-produced non-corneal HK – loop electrode. Electroretinograms were … Preberite več >>