ASSESSMENT OF POSTURAL INSTABILITY IN PATIENTS WITH A NEUROLOGICAL DISORDER USING A TRI-AXIAL ACCELEROMETER
| Autor: | Ondrej Cakrt, Jakub Schlenker, Patrik Kutilek, Vladimir Socha, Lenka Hanakova |
|---|---|
| Rok vydání: | 2015 |
| Předmět: |
medicine.medical_specialty
trunk acceleration cerebellar disease Triaxial accelerometer General Engineering Postural instability confidence ellipsoid volume Neurological disorder medicine.disease Accelerometer Trunk Physical medicine and rehabilitation postural stability lcsh:TA1-2040 Postural stability medicine Physical therapy gyro-accelerometer lcsh:Engineering (General). Civil engineering (General) Set (psychology) Psychology Balance (ability) |
| Zdroj: | Acta Polytechnica, Vol 55, Iss 4, Pp 229-236 (2015) |
| ISSN: | 1805-2363 1210-2709 |
| DOI: | 10.14311/ap.2015.55.0229 |
| Popis: | Current techniques for quantifying human postural stability during quiet standing have several limitations. The main problem is that only two movement variables are evaluated, though a better description of complex three-dimensional (3-D) movements can be provided with the use of three variables. A single tri-axial accelerometer placed on the trunk was used to measure 3-D data.We are able to evaluate 3-D movements using a method based on the volume of confidence ellipsoid (VE) of the set of points obtained by plotting three accelerations against each other. Our method was used to identify and evaluate pathological balance control. In this study, measurements were made of patients with progressive cerebellar ataxia, and also control measurements of healthy subjects, and a statistical analysis was performed. The results show that the VEs of the neurological disorder patients are significantly larger than the VEs of the healthy subjects. It can be seen that the quantitative method based on VE is very sensitive for identifying changes in stability, and that it is able to distinguish between neurological disorder patients and healthy subjects. |
| Databáze: | OpenAIRE |
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