Wyniki wyszukiwania - BazTech

1

Three-dimensional analysis of the pelvic and hip mobility during gait on a treadmill and on the ground

Staszkiewicz R., Chwała W., Forczek W., Laska J.

Acta of Bioengineering and Biomechanics

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2012

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Vol. 14, no. 2

83-89

EN

Pelvic girdle combines two units: passenger and locomotor. That is why the importance of this part of the body is emphasized by all researchers in terms of gait economy. The purpose of our research was to determine the changes of pelvic girdle mobility and hip joint in men in three planes of movement (sagittal, frontal and horizontal) during gait at a speed of 5 km/h. The methodology used here aimed at assessing the impact of the surface (ground or treadmill) on the mobility in those planes. To register overground and treadmill locomotion we applied: Vicon 250, Cardionics Treadmill 3113. The sample of the study was the group of 30 men aged between 21 and 23. The analysis of the results revealed the biggest impact of the type of surface on both pelvis and hip joint in the transverse plane. When the subjects moved on the natural ground, the pelvic range of motion (ROM) in this plane was more than twice wider than that in treadmill walking. Whereas in the case of hip joint, significantly higher ROM values occurred in the transverse plane during walking on the treadmill.

2

Changes of kinematic gait parameters due to pregnancy

Forczek W., Staszkiewicz R.

Acta of Bioengineering and Biomechanics

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2012

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Vol. 14, no. 4

113-119

EN

When a woman becomes pregnant her body undergoes tremendous changes hormonally and anatomically. Our survey revealed very little literature on biomechanics of gait in gravidas and lack of consensus among scientists in pregnancy-related mechanisms of body adaptation. That is why the authors felt encouraged to determine the effect of pregnancy on the biomechanical pattern of walking. To investigate alterations in natural locomotion, we used a 3D motion-analysis system Vicon. The inclusion criteria aimed at selecting only healthy subjects (n = 13). Each woman participated in 3 sessions: before pregnancy, during the last trimester of gestation and, finally, half year after delivery. For the purpose of this study, selected kinematic parameters for pregnant and non-pregnant conditions were compared. Gravid women performed lower velocity of their gait and lower frequency of steps. The length of their step decreased in comparison to pre pregnancy state. The results did not reveal any changes in the range of motion of the ankle, knee and hip in different physiological conditions. However, we observed increased base of support and double support phase in gravidas comparing to non pregnant states (by about 10%). This finding indicates that there is a tendency to maximize safety in gait during pregnancy.

3

Modelowanie i analiza kręgosłupa ludzkiego w kontekście badań wad postawy i klasyfikacji bólów krzyża

Długosz M.

Pomiary Automatyka Robotyka

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2011

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R. 15, nr 12

97-99

PL

Badania dotyczące kręgosłupa ludzkiego, jego funkcji i schorzeń bądź patologii są prowadzone przez licznych specjalistów z różnych dziedzin nauki, w tym medycyny, biomechaniki czy inżynierii rehabilitacyjnej. Niniejsza praca przedstawia aktualny stan wiedzy na temat metod dynamicznych wykorzystujących sztuczne sieci neuronowe do klasyfikacji i analizy bólów krzyża. W artykule opisano również badania nad stworzeniem precyzyjnego modelu szkieletu człowieka do celów analizy ruchu kręgosłupa przy użyciu systemu Vicon.

EN

Research on the human spine, its function and disease or pathology, are conducted by numerous experts from various fields, including medicine, biomechanics and rehabilitation engineering. This paper presents the state-of-the-art of knowledge about dynamic methods using artificial neural networks for low back pain (LBP) classification and analysis. The article also describes research on the development of a precise model of human skeleton for spine motion analysis using Vicon system.

4

Modelowanie kinematyki kręgosłupa zdeformowanego na skutek skoliozy z wykorzystaniem metod optoelektronicznych

Maciejasz P.

Zeszyty Naukowe Katedry Mechaniki Stosowanej / Politechnika Śląska

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2006

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z. 30

163-168

PL

W niniejszej pracy zaprezentowano metodę umożliwiającą analizę kinematyki kręgosłupa z wykorzystaniem optoelektronicznego sytemu rejestracji ruchu. Metoda ta wykorzystuje krzywe Beziere w celu wyznaczenia kształtu kręgosłupa. Metodę zweryfikowano w czasie badań 14 nastoletnich osób dotkniętych skoliozą. Badania zostały przeprowadzone za pomocą systemu Vicon 250. Rezultaty uzyskane w czasie tych badań znalazły odzwierciedlenie w innych badaniach patomechaniki skoliozy, a zaproponowana w tej pracy metoda wydaje się być obiecującym narzędziem dla fizjoterapeutów.

EN

In this paper a method of evaluating the kinematics of a spine by use of a motion capture system has been presented. The method makes use of the Bezier curves to evaluate kinematics of the spine. The model was verified by taking static and gait trials of 14 juveniles with idiopathic scoliosis. Data were collected using theVicon 250 Motion Capture System. The results proves that the method introduced in this paper shows good ability for scoliosis imaging during dynamic trials.