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EN
The purpose of this study was to assess if 65 dB and 4000 Hz stimuli affect postural stability of young normal hearing people. Methods: Posturography examinations belong to clinical tests which evaluate the motor skills. Posturography can be divided into static posturography and dynamic posturography. In both, static posturography and dynamic posturography, patient stays on the platform with opened and closed eyes, but in the case of dynamic one, platform is unstable. In this study the Multitest Equilibre platform produced by FRAMIRAL was used. Patients took part in tests with opened and closed eyes, on stable and unstable platform. Additionally patients were exposed to 65 dB and 4000 Hz acoustic stimuli. The sound pressure level, and frequency was belonging to the best audibly frequency range. Results: Parameters such as velocity and surface were examined. The difference between velocity measured with acoustic stimuli and without acoustic stimuli was observed. On the other hand there was no difference in surface results. Conclusions: The statistically significant difference between velocity of patients center of gravity movements, measured on unstable platform, in the presence of 4000 Hz, 65 dB acoustic stimulus and without additional disturbances was observed.
EN
Purpose: Presentation of the results of clinical study on new supplementary method applied in the physical rehabilitation of patients who underwent total hip arthroplasty. The standard rehabilitation program was supplemented with the lower limb loading symmetry training based on the follow-up posturography with an adaptively modified visual biofeedback, performed on a double plate posturographic platform. Methods: The research involved 60 randomly selected patients included in prospective and comparative clinical study in the scheme of the parallel groups. The subjects were divided into two groups comprised of 30 patients each. In both groups a conventional 21-day rehabilitation was carried out. Additionally, in experimental group the limb loading symmetry restoration training based on the follow-up posturography with an adaptively modified biofeedback was implemented. The biofeedback coefficient reflected the distribution of loading exerted on a given patient’s legs and was evaluated during the static posturography examinations carried out before each symmetry training session. Results: The eyes-open static posturography examinations indicated significant improvement in the lower limb loading symmetry in 29 (97%) patients from the experimental group ( p = 0.000003). In the control group, such an improvement was observed in 20 (67%) patients ( p = 0.034796). In the eyes closed examinations correction in the limb loading symmetry was evident in 23 (77%) patients from the experimental group ( p = 0.000247) and 18 (60%) patients from the control group ( p = 0.043327). Conclusions: Significant improvement in the lower limb loading symmetry was observed in patients who underwent rehabilitation supplemented with the herein discussed training method.
EN
Purpose: After a vestibular deficit some patients may be affected by chronical postural instability. The aim of this study was to identify the emotional and cognitive factors of these symptomatic patients. In particular, the double cognitive task and the anxiety disorder were identified by our patients. Through a retrospective study, 14 patients (65.4 ±18 years) participated in the experiment. Method: The experimentation consists in the study of the standing position of our patients through the aggregate of the trajectories of the center of pressure (COP) using a force plate device. With the aim of isolating the emotional and cognitive influence, this experimentation was defined in two conditions. In the first one, the patients were asked to maintain their balance without additional tasks. In the second one, the patients were submitted to an additional cognitive arithmetic task. The stabilogram surface, length (the forward and backward displacement distance during deviations in COP), lateral and the antero-posterior deviations were assessed. Results: Our results showed an increase of postural instability of patients affected by chronical vestibular disorders when submitted to the double task. The patients submitted to the cognitive task present a larger surface of activity in comparison with the free-task one (Wilcoxon test p-value equals p = 0.0453). In addition, their displacements inside this area are more important (p = 0.0338). The COP of all our patients deviated forward in the presence of the double task. Conclusion: The increase in instability during the double cognitive task could be explained by an additional stress caused by the desire to make a success of the cognitive task.
4
Content available remote Analiza metrologicznych i użytkowych właściwości posturografu
PL
W niniejszym artykule dokonano analizy właściwości metrologicznych i użytkowych modelu posturografu opracowanego w ramach prac badawczych w WSTI we współpracy z firmą MENSOR. W odniesieniu do istniejących rozwiązań rozpatrzono aspekty konstrukcyjne, metrologiczne statyczne i dynamiczne, ekonomiczne oraz problemy przetwarzania danych.
EN
Here we present an analysis of metrologial properties and applications of a posturograph model designed by WSTI and MENSOR company. Constructional, metrological, statistical, dynamical, economic aspect as well as data analysis properties of the model were compared to existing solutions.
5
Content available The posturograph application in a dyslexia diagnosis
EN
This paper shows the analysis of possibilities of center of mass projection tracking application in dyslexia diagnosis. The metrological, economical as well as constructional issues of computerized dynamic posturograph (CDP) are taken into consideration.
PL
W niniejszym artykule dokonano analizy możliwości wykorzystania przebiegu położenia rzutu środka ciężkości na płaszczyznę podstawy do diagnozowania dysleksji. Rozpatrzono aspekty metrologiczne konstrukcyjne i ekonomiczne zastosowania platform posturograficznych.
EN
An analysis of the human body centre of gravity movement using a force platform is a common method in the posturographic diagnosis. Both, static and dynamic methods of posture testing, based on a forward leaning as a response to the standardised visual step signal, and a new method of analysis of these reactions, using the phase pIane method, are presented in the paper. Data characterising the new dynamic and static tests, known from literature, were classified by pair wise k-nearest neighbour and multidimensional analysis of variance methods.
PL
Analiza ruchu rzutu środka ciężkości na poziomą płaszczyznę podparcia z wykorzystaniem płatformy siłowej (posturografu) jest metodą powszechnie wykorzystywaną w diagnostyce utrzymania postawy człowieka. W artykule przedstawiono wyniki analizy postawy za pomocą znanych z literatury posturograficznych metod statycznych i dynamicznych oraz nowej metody opartej na analizie wychyleń ciała do przodu, będących odpowiedzią na standaryzowany skokowy sygnał świetlny, określający wielkość wychylenia, z wykorzystaniem metody płaszczyzny fazowej. Dane eksperymentalne odnoszące się do testów dynamicznych i statycznych były klasyfikowane za pomocą metod: k-najbliższych sąsiadów i wielowymiarowej analizy wariancji. Opracowane testy dynamiczne umożliwiają dokładniejszą diagnostykę posturograficzną niż testy statyczne, które są używane w praktyce medycznej.
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