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KMID : 0390320130230010109
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Chungbuk Medical Journal
2013 Volume.23 No. 1 p.109 ~ p.115
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Development of Balance Measurement System with Force Platform
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Lee Kyung-Moo
Kim Ok-Hyun
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Abstract
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Purpose: Commercial posturography system provides a variety of balance measurement variables and treatment programs. However, most of the commercial posturography system does not provide the basic measured variables required on related researches. So we planed to develop a force platform system to measure center of pressure(COP) and software to analyze center of pressure data. Materials and Methods: We developed force platform with load cells, amplifiers, AD converters and PC. With Labview program, we calculated medio-lateral and antero-posterior sway, total path length, root mean square(RMS) values, COP velocity, RMS of COP velocity, 95% ellipse area and display COP movement on the screen. This program also has function to store data sampled from the load cells to the text file. Thereafter we perform motor function tests, clinical balance tests, static and dynamic posturographic evaluations with this force platform system on ten patients with cerebrovascular diseases. Results: In static posturographic evaluation, timed up and go test has significant correlations with medio-lateral and antero-posterior sway, RMS values of medio-lateral and antero-posterior sway One legged stance time in more paralyzed side has significant correlations with medio-lateral and antero-posterior sway, RMS values of medio-lateral and antero-posterior sway, medio-lateral and antero-posterior path length. In dynamic posturographic evaluation, timed up and go test has significant correlations with 95% ellipse area, one legged stance time in more paralyzed side has significant correlations with antero-posterior path length, RMS values of antero-posterior sway and antero-posterior COP velocity. Conclusion: We developed force platform system to calculate and analyze the COP and were able to get a variety of measurements. The results measared from this system have meaningful correlations with clinical balance tests in patients with cerebrovascular diseases, so this force platform system can be used as a clinical as well as a research tool to study balance disorders in patients with brain diseases.
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KEYWORD
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Balance, Force, Platform
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Listed journal information
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