DL Alekseev

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The paper presents rheographic investigations of regional haemodynamics (brain, lungs, liver and limbs) during antiorthostatic exposures of varying intensity (-15, -30, -45 degrees, times of exposure 20, 40 and 60 min). Our findings show that the pattern and time of the function of compensatory mechanisms preventing excessive vascular compliance [correction(More)
In response to simulated space flights cardiovascular and metabolic changes of 86 volunteers, aged 40-49 and 50-56, were similar to those of young people (25-39 years old). In most aged test subjects, the changes produced by 8-day head-down tilt (-8 degrees) and 7-day water immersion were moderate and reversible. This type of variation of the(More)
The cerebral, pulmonary, liver and peripheral circulation was studied simultaneously in 12 test subjects (aged 24--30) rheographically, photoplethysmographically and rheoplethysmographically; arterial pressure was measured by the Korotkoff method. The measurements were carried out during three antiorthostatic tests at --15degrees for 20 min or --30degrees(More)
Cerebral bioelectric activity of 18 healthy test subjects, aged 31-40, was examined during and after their 182-day head-down tilting. The test subjects were divided into a group that performed countermeasures (exercise, muscle stimulation) against hypokinesia-induced disorders and a control group. During the study EEG changes were most pronounced in the(More)
Postflight rheographic examinations carried out at rest and during postural tests showed noticeable changes in the vascular regulation and significant blood redistribution. On the recovery day there were no signs of the intracranical venous congestion to weightlessness. The tone of cerebral vessels, however, increased to prevent the development of cerebral(More)
Methods The analysis includes data of 60 patients with JIA who were getting ABA in 2010 2013. The average age of patients is 12,5 years (from 6 to 18 years). 21 (35%) patients suffered from active uveitis (2 patients had one eye affection, 19 had affection of both eyes). 10 (16%) patients were diagnosed as sJIA without current systemic features. Patients(More)
  • D A Alekseev
  • Kosmicheskaia biologiia i aviakosmicheskaia…
  • 1979
Cerebral bioelectric activity of 18 male test subjects (9 test subjects with early manifestations of autonomic-vascular dysfunctions of the hypertensive, hypotensive or cardiac type, and 9 healthy test subjects), aged 25 to 42, was studied during their 49-day head-down tilting (-4 degrees) and during recovery. On the 5th experimental day their EEG showed(More)