Journal of Mechanical Science and Technology

, Volume 30, Issue 6, pp 2891–2897 | Cite as

A musculoskeletal lumbar and thoracic model for calculation of joint kinetics in the spine

  • Yongcheol Kim
  • Ducmanh Ta
  • Moonki Jung
  • Seungbum KooEmail author


The objective of this study was to develop a musculoskeletal spine model that allows relative movements in the thoracic spine for calculation of intra-discal forces in the lumbar and thoracic spine. The thoracic part of the spine model was composed of vertebrae and ribs connected with mechanical joints similar to anatomical joints. Three different muscle groups around the thoracic spine were inserted, along with eight muscle groups around the lumbar spine in the original model from AnyBody. The model was tested using joint kinematics data obtained from two normal subjects during spine flexion and extension, axial rotation and lateral bending motions beginning from a standing posture. Intra-discal forces between spine segments were calculated in a musculoskeletal simulation. The force at the L4-L5 joint was chosen to validate the model’s prediction against the lumbar model in the original AnyBody model, which was previously validated against clinical data.


Joint kinetics Lumbar spine Musculoskeletal model Thoracic spine 


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Copyright information

© The Korean Society of Mechanical Engineers and Springer-Verlag Berlin Heidelberg 2016

Authors and Affiliations

  • Yongcheol Kim
    • 1
  • Ducmanh Ta
    • 1
  • Moonki Jung
    • 2
  • Seungbum Koo
    • 1
    Email author
  1. 1.School of Mechanical EngineeringChung-Ang UniversitySeoulKorea
  2. 2.AnyBody Technology A/SAalborgDenmark

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