KUKU

KU ScholarWorks

  • myKU
  • Email
  • Enroll & Pay
  • KU Directory
    • Login
    View Item 
    •   KU ScholarWorks
    • Dissertations and Theses
    • Theses
    • View Item
    •   KU ScholarWorks
    • Dissertations and Theses
    • Theses
    • View Item
    JavaScript is disabled for your browser. Some features of this site may not work without it.

    An Investigation of Cardan Rotation Sequences on Lumbar Spine Lifting Kinematics

    Thumbnail
    View/Open
    Louie_ku_0099M_16213_DATA_1.pdf (8.530Mb)
    Issue Date
    2018-12-31
    Author
    Louie, Ednah
    Publisher
    University of Kansas
    Format
    78 pages
    Type
    Thesis
    Degree Level
    M.S.
    Discipline
    Bioengineering
    Rights
    Copyright held by the author.
    Metadata
    Show full item record
    Abstract
    Euler angles are commonly used for kinematic descriptions due to their ability to translate to clinical contexts and the conciseness of using three rotation angles. A challenge with using Euler angles is their dependency on Euler sequence selection. Many studies do not use the same Euler sequence, leading to difficulty comparing across studies. Though sequence selection recommendations have been made, there are disagreements among researchers on these recommendations. The goal of this study is to assess the effect of Cardan sequence selection on lumbar spine motions restricted to a single plane and motions across multiple planes. Cardan sequences are a subset of Euler sequences using all three orthogonal directions. This goal was investigated through collecting the lumbar spine kinematics of 22 human participants performing cyclic lifting tasks in two positions and three directions. Four spine angles were calculated: trunk flexion, lumbar flexion, lumbar lateral rotation, and lumbar axial rotation. It was hypothesized that motion restricted to a single plane would be best represented by sequences where the first rotation matches the plane of motion. Through two lifting tasks restricted to the sagittal plane, this study found sequences other than YXZ and ZXY could describe the four calculated spine angles. It was also hypothesized that motions occurring across multiple planes would be best represented by the sequence with the planes of motion ordered by the magnitude of range of motion, from largest to smallest. This is supported by investigation of four asymmetric lifting tasks where sequences XYZ and XZY were found to give the best representation of the motions performed. In these asymmetric lifting tasks, motion about X was the greatest, and the magnitudes of motion about Y and Z were very similar. When assessing the robustness of Cardan sequences for description of lumbar spine angles across single and multiple-plane lifting motions, we would recommend XYZ or XZY as the sequence of choice.
    URI
    http://hdl.handle.net/1808/27614
    Collections
    • Theses [3743]

    Items in KU ScholarWorks are protected by copyright, with all rights reserved, unless otherwise indicated.


    We want to hear from you! Please share your stories about how Open Access to this item benefits YOU.


    Contact KU ScholarWorks
    785-864-8983
    KU Libraries
    1425 Jayhawk Blvd
    Lawrence, KS 66045
    785-864-8983

    KU Libraries
    1425 Jayhawk Blvd
    Lawrence, KS 66045
    Image Credits
     

     

    Browse

    All of KU ScholarWorksCommunities & CollectionsThis Collection

    My Account

    LoginRegister

    Statistics

    View Usage Statistics

    Contact KU ScholarWorks
    785-864-8983
    KU Libraries
    1425 Jayhawk Blvd
    Lawrence, KS 66045
    785-864-8983

    KU Libraries
    1425 Jayhawk Blvd
    Lawrence, KS 66045
    Image Credits
     

     

    The University of Kansas
      Contact KU ScholarWorks
    Lawrence, KS | Maps
     
    • Academics
    • Admission
    • Alumni
    • Athletics
    • Campuses
    • Giving
    • Jobs

    The University of Kansas prohibits discrimination on the basis of race, color, ethnicity, religion, sex, national origin, age, ancestry, disability, status as a veteran, sexual orientation, marital status, parental status, gender identity, gender expression and genetic information in the University’s programs and activities. The following person has been designated to handle inquiries regarding the non-discrimination policies: Director of the Office of Institutional Opportunity and Access, IOA@ku.edu, 1246 W. Campus Road, Room 153A, Lawrence, KS, 66045, (785)864-6414, 711 TTY.

     Contact KU
    Lawrence, KS | Maps