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몸통 운동시 지향각(Orientation angles)을 이용한 허리 근육의 3차원 위치 좌표 추정 기법
The method to estimate 3-D coordinates of lower trunk muscles using orientation angles during a motion

임영태    (영남대학교  );
  • 초록

    The purpose of this study was to develop a method for estimating 3-D coordinates of lower trunk muscles using orientation angles during a motion. Traditional 3-D motion analysis system with DLT technique was used to track down the locations of eight reference markers which were attached on the back of the subject. In order to estimate the orientations of individual lumbar vertebrae and musculoskeletal parameters of the lower trunk muscle, the rotation matrix of the middle trunk reference frame relative to the lower trunk reference frame was determined and the angular locations of individual lumbar vertebrae were estimated by partitioning the orientation angles (Cardan angles) that represent the relative angles between the rotations of the middle and lower trunks. When the orientation angles of individual intervertebral joints were known at a given instant, the instantaneous coordinates of the origin and insertion for all selected muscles relative to the L5 local reference frame were obtained by applying the transformation matrix to the original coordinates which were relative to a local reference frame (S1, L4, L3, L2, or L1) in a rotation sequence about the Z-, X- and Y-axes. The multiplication of transformation matrices was performed to estimate the geometry and kinematics of all selected muscles. The time histories of the 3-D coordinates of the origin and insertion of all selected muscles relative to the center of the L4-L5 motion segment were determined for each trial.


  • 참고문헌 (6)

    1. Abdel-Aziz, Y. I., & Karara, H. M. (1971). Direct linear transformation from comparator coordinates in object-space coordinates in close range photogrammetry. Proceedings of the ASP Symposium of Close-Range Photogrammetry. Urbana: University of Illinois. 
    2. Cholewicki, J. (1993). Mechanical stability of the in vivo lumbar spine. Unpublished doctoral dissertation, University of Waterloo. 
    3. Kwon, Y. -H. (1999). Orientation angles. Kwon3D Motion Analysis Web. http://kwon3d.com/korean/theory/jkinem/euler_angles.html. 
    4. Lim, Y. -T. (2000). Estimating the lumbar spinal loads during a golf swing using an emg-assisted optimization approach. Unpublished doctoral dissertation. University of Illinois at Urbana-Champaign, Illinois. 
    5. McGill, S. M. (1992). A myoelectrically based dynamic three-dimensional model to predict loads on lumbar spine tissues during lateral bending. Journal of Biomechanics, 25 (4), 395-414. 
    6. White, A. A., & Panjabi, M. M. (1990). Clinical biomechanics of the spine. Philadelphia: JB Lippincott Co. 

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