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Biomedical subjects

V N Kamenskaia

Publications and source records attributed to V N Kamenskaia.

14 recordsLinked to original sources
PubMed1976

[A new model of the cardio-cardiac reflex].

A special cardiac vagal afferent stimulation was used in frogs. Bursts of stimuli were applied to the central end of the left cardiac bransh of the vagus with frequency of 1 burst per a heart beat during 2--5 heart beats. In this way the R-wave of the ECG triggered the stimulator after a desired delay. The stimulation induced hypotension and decreased the heart rate, both effects being abolished by cutting the right cardiac branch of the vagus. Every burst of stimuli applied to the left cardiac branch evoked a discharge of the efferent cardiac fibers in the right vagus. Both bradycardia and the energy of the efferent discharges were found to depend on the intensity of stimulation and on the bursts relation to the phases of the cardiac cycle. Maximal cardiac slowing and maximal energy of the efferent vagal discharges were observed when the bursts were synchronized with S--T interval, while minimal those - when the stimulation occurred during T--P interval of the ECG.

Animals↗
PubMedDate not supplied

[Characteristics of the afferent activity of the cardiac nerves of Agrionemys horsfieldi turtles].

On the basis of changes in afferent impulsation emerging from the heart of the tortoise A. horsfieldi under various conditions of cardiac haemodynamics, it was shown that bursting activity of the superior cardiac nerves belongs to mechanoreceptors which are located in the ventricle and the adjacent arterial vessels. The discharge in these mechano-receptors coincides with ventricular systole. The second, predominant, type of afferentation is presented by irregular continued activity in both the superior and inferior vagal branches. The origin of this activity remains uncertain.

Animals↗