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Biomedical subjects

F A Solodovnik

Publications and source records attributed to F A Solodovnik.

At least 19 recordsLinked to original sources
PubMedDate not supplied

Experimental study of some features of the etiology and pathogenesis of motion sickness.

A study was made of vestibular stability in man as affected by acceleration in various directions and of acceleration affecting receptors of the vestibular apparatus with varying frequency. It was established that tolerance for vestibular stimulation in certain individuals may be affected by direction of acceleration and frequency of the action. Individual susceptibility to motion sickness is widely expressed under conditions of specific vestibular stimulation. The results obtained indicate that development of motion sickness does not depend on the activity of the vestibular analyzer and motion sickness is not its specific vestibular reaction. Motion sickness is a reaction of the whole organism and its manifestation under long stimulation of receptors of the vestibular apparatus in individuals predisposed to motion sickness depends on specific features of the activity of the limbico-reticular complex.

Acceleration↗
PubMedDate not supplied

[Effect of human body position and its holding on the level of manifestation of spatial illusions in weightlessness].

Test subjects were exposed to short-term weightlessness in various positions: standing, seated, supine in the cosmonaut's chair and on the flat surface, with the head kept straight ahead, bent forward or backward. Their susceptibility to illusionary sensations was measured. It was found that the development of spatial illusions in the weightless state was not correlated with body position, head position relative to the torso or restraint type.

Humans↗
PubMedDate not supplied

[Effect of blood redistribution on illusional sensations of spatial position in weightlessness].

The study was performed onboard a specially equipped aircraft which allowed zero-g and high-g studies. Blood redistribution was produced using a tilt table (-30 degrees) and a LBNP device. Illusionary sensations were measured by a Birtok unit and subjective reports of the test subjects. In the head-down position the feeling of blood rush to the head disappeared as soon as the weightless state was reached. In most cases illusionary sensations were similar to those in the horizontal position. When exposed to LBNP tests, the subjects developed no illusionary sensations during horizontal flight and felt their upper body going upwards and legs going downwards in the weightless state. Thus, illusionary sensations of the spatial position depend at large on blood redistribution in the human body.

Aerospace Medicine↗