Coordinate Transformation Using the Direction of Sway : Based on the Center of Foot Pressure When Standing as the Reference Axis

IR Web Site

Bibliographic Information

Other Title
  • 立位時の足圧中心に対し動揺方向を基準軸とする座標変換の提案
  • リツイジ ノ ソクアツ チュウシン ニ タイシ ドウヨウ ホウコウ オ キジュンジク ト スル ザヒョウ ヘンカン ノ テイアン

Search this article

Description

[Purpose]This paper proposes a method to convert the coordinates specified for the center of foot pressure (COP) measurement plate to the coordinates for which the postural sway direction of a subject is the reference axis. [Method and Result] The COP was measured during the period from the tandem open-leg standing position to the one-leg standing position on the front limb. The analysis period was 1 s immediately after the one-leg standing position began. The reference axis direction was determined by two ways. The movement direction was calculated for each observation point and converted into the direction at every 30°. The direction that was the mode was set as the direction of the reference axis, and the maximum sway range was calculated. In addition, the movement direction was classified into groups of 30° each, and the total distance traveled between the observation points was calculated for each group. The direction for which the total distance was the maximum was set as the direction of the reference axis, and the maximum sway range was calculated. For each trial, the direction of the reference axis as determined based on the mode differed from that determined based on the total distance. [Conclusion]It was possible to rotate the coordinates meaningfully about the COP. It is suggested that the degree of sway can be assessed without specifying the position of the foot on the measuring plate.

Journal

Keywords

Details 詳細情報について

Report a problem

Back to top