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Posturographic methods for body posture symmetry assessment

Łukaszewicz T., Kania D., Kidoń Z., Pethe-Kania K.

Bulletin of the Polish Academy of Sciences. Technical Sciences

2015

Vol. 63, nr 4

907--917

The article presents a number of posturographic methods enabling objective postural symmetry assessment in patients undergoing rehabilitation after total hip replacement surgery. The key goal of such rehabilitation is fast restoration of a proper body weight distribution. The postural symmetry measures proposed in the article enable generalized quantification of the CoP (Center of Pressure) trajectories measured during standard static posturography diagnostics and the so-called follow-up posturography examination. The follow-up posturography is a relatively new but promising method of physical rehabilitation. All of the herein discussed posturographic measures have been designed specifically to quantify postural symmetry either in a standing and relaxed upright position, in the absence of any deterministic external stimulation (static posturography) or in the presence of a visual biofeedback stimulation enforcing the coordinated slow swaying movements of the body (the follow-up posturography). The experimental results presented in this paper constitute the outcome of the long-term cooperation between the Institute of Electronics of the Silesian University of Technology and the Silesian Rheumatology and Rehabilitation Hospital. The usefulness of the proposed postural symmetry measures has been verified in a series of clinical trials carried out in a selected group of patients undergoing rehabilitation after total hip replacement surgery.

Ocena symetrii postawy w teście stabilografii nadążnej

Łukaszewicz Т., Kania D., Kidoń Z., Pethe-Kania K.

Elektronika : konstrukcje, technologie, zastosowania

2014

Vol. 55, nr 1

51-54

W artykule przedstawiono metodę oceny symetrii postawy wykorzystującą stabilografię ze wzrokowym sprzężeniem zwrotnym – zwaną stabilografią nadążną. Parametrami określającymi stopień symetrii są odchylenia standardowe składowych х, у różnicy nadążnej trajektorii stabilograficznej zarejestrowanej dla lewoskrętnego bodźca wzrokowego i odbicia lustrzanego względem osi rzędnych trajektorii nadążnej zmierzonej dla bodźca prawoskrętnego.

The paper presents a method for postural symmetry assessment utilizing posturographic examination with visual feedback stimulation, known as the follow-up posturography. Parameters quantifying the degree of symmetry are the standard deviations of x, у components of a difference signal obtained from subtracting the mirror image of the follow-up trajectory acquired for clockwise visual stimulation, with Y being the axis of reflection, from the follow-up trajectory measured during the counterclockwise visual stimulation.