[Stabilometric features of vertical stability in healthy individuals by short-time bite change].

The aim of the study was to evaluate vertical stability changes according to stabilometric findings under artificial short-time disturbed occlusion. Twelve individuals were included in the study and vertical stability was assessed in stability platform before and under short-time bite change. The registered changes might be connected with an approximate reaction and random reasons. There is a possibility of bias by mechanical transfer of the stabilometric study results on the diagnosis of dental status.

[Increase in patient vertical stability in acute period of ischemic stroke]. / Povyshenie vertikal'noi ustoichivosti patsientov v ostrom periode ishemicheskogo insul'ta.

OBJECTIVES: To develop a technique of physical rehabilitation of stroke based on the gradual increase of motor/cognitive loading using biofeedback to supporting reaction based on stabilometry with a focus on the changes in peripheral afferentation with the help of an axial loading suit and simple non-apparatus vestibular and respiratory exercises. The efficacy of standard scheme of restorative treatment and a new technique of optimized complex rehabilitative treatment of acute ischemic stroke in the vertebral-basilar system was compared. MATERIAL AND METHODS: We examined 28 patients with acute stroke in the vertebrobasilar area manifesting with dizziness, disturbances of equilibrium and stability. The patients were randomized into two equal groups (n=14). In the main group, a new technique was added to standard treatment. In the control group, traditional pharmacological and physical treatment was used. We administered clinical scales and instrumental stabilometric assessment as well. RESULTS: A significant improvement of the vertical stability assessed with clinical scales (Bohannon, Perry, Stolyarova, Berg Balance Scale) and stabilometric parameters (the Romberg's test) was shown in the main group compared to the control one. CONCLUSION: The new technique expands the potentials of rehabilitation in the acute stage of stroke and allows to prepare the patient to independent gait.

[Some issues of the relevant values of stabilometric study in dentistry].

New stabilometry value associated with energy consumption of the examinee is proposed and clinical case illustrating its use for complex prosthodontic treatment quality assessment. Need for national guidelines on stabilometry for dental practice is also discussed.

[Electroencephalographic signs of internal attention in the mental counting of heart beats].

Attention is regarded as a dynamic spatio-temporal structure reflected inter alia in distribution patterns of total spectral power density of EEG alpha-rhythm obtained in volunteers. Factors influencing formation, time of existence and parameters of such structure are related to dynamics of the observation object (heart), to the use of individual combinations of perception codes, by the volunteers etc. It is supposed that localization of a single "cerebral area of attention" can not be universal for all individuals. An approach to the description of different types of attention to one's own heart is proposed in which attention is characterized based on distinguishing critical points or EEG registration zones in which the loss of system's stability is most likely reflected as transition to another functional state.

[The method of the short term cardiorhytmogram analysis in estimation of estimation of fast change of human activity types].

A new high accuracy method of evaluation of individual RR-intervals distribution is described. The twofold benefits of quantiles measurement of short term RR-intervals distribution are high accuracy and reability of results as well as possibility to compare the results among different time spans. The method offered might be used to measure quick changes of human activity. The differences of individual RR-intervals distribution are revealed correlate to type and effectiveness of the activity during 60 sec periods.

[Characteristics of the heart rate during mental tracing of heartbeats in healthy subjects].

Mental counting of self heartbeats results in changes of parameters of heart rhythm--domain and other frequencies of the RR-intervals, especially, high frequencies (0.15-0.4 Hz), which are relevant to respiration. The accuracy of mental counting of the heartbeats (the ratio of traced beats to the number of registered ones) corresponds to individual relations between the frequencies, regularity, and total number of the heartbeats. A possibility of the voluntary regulation of respiration as the cause of changes in the heartbeat frequency is discussed in terms of the center-periphery integration (system approach) for optimal perception of self heartbeats.