[THE INFLUENCE OF INFORMATION LOAD ON THE TIMECOURSE OF SPECTRAL PARAMETERS OF HEART RATE VARIABILITY IN STUDENTS WITH DIFFERENT CHRONOTYPES].

In the study, distinctions in daily timecourse of spectral parameters of the heart rate variability (HRV) at rest wakefulness and at information load in students with different chronotypes are revealed. The most pronounced changes in the general spectral power of HRV due to fluctuations of all parameters, but especially the VLF, LF, HF waves and the LF/HF index were found in students with a daily chronotype at rest and after implementation of load tests during the different periods of the school day. In persons with an evening chronotype in conditions of rest, the greatest variability was found in a spectral HF component of HRV, and responses to information load were found during the day in different combinations of changes of LF and HF components and the LF/HF index. In students with a morning chronotype during rest wakefulness, considerable fluctuations of a proportion of LF waves were observed, whereas in response to information load during certain periods of the day, representation of LF and HF components of the spectrum was changed. The wide variability of HRV spectral parameters in students with daily activity, compared to students with early and late activities, reflects the advantages of persons with a daily chronotype in terms of adaptation to different operation modes and irregular stress information in the course of the day.

[Functional treatment of diaphyseal fractures of the humerus using a polyvic orthosis]. / Funktsional'noe lechenie diafizarnykh perelomov plecha s pomoshch'iu orteza iz polivika.

The authors expound a method of functional treatment with a "short" polyvic orthosis on the basis of their experience in treating 38 patients. The degree of mobility of the fragments fixed with this orthosis has been investigated in clinical, biomechanical and roentgenometrical studies. It has been determined that the mobility of the fragments within 15 degrees has no negative impact on the consolidation process. The results of the treatment have been given a comparative evaluation. The terms of the treatment were up to 2 months in 2 patients, up to 3 months in 26 patients and up to 4 months in 3 patients. Consolidation with the deformation of 5-15 degrees has been observed in 18 patients.