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Inverse kinematics in cervical spine models: Effects of scaling and model degrees of freedom for extension and flexion movements.
J Biomech
October 2024
Voiland School of Chemical Engineering and Bioengineering; and Department of Integrative Physiology and Neuroscience, Washington State University, Pullman, WA, USA. Electronic address:
Article Synopsis
- Intervertebral kinematics influence the predicted loads and strains on the spine, making it essential to understand kinematic errors for accurate model predictions.
- This study explored how different neck kinematic models impact the prediction of intervertebral kinematics based on head and trunk markers during head and neck movement.
- Results showed that as the complexity of the models increased, marker tracking errors decreased, highlighting key differences in motion compared to the gold standard radiographic data, which are crucial for validating these models.
Anatomical Pelvic Parameters Using the Anterior Pelvic Plane: Normative Values and Estimation of the Standing Sagittal Alignment in Healthy Volunteers.
Spine Surg Relat Res
January 2024
Division of Orthopedic Surgery, Department of Regenerative and Transplant Medicine, Niigata University Graduate School of Medical and Dental Sciences, Niigata, Japan.
Introduction: In this study, we aim to estimate the natural standing sagittal alignment in patients with adult spinal deformity (ASD), firstly by investigating the normative values of anatomical pelvic parameters based on the anterior pelvic plane (APP) in a healthy population, and to clarify the relationships between the anatomical and positional pelvic parameters in standing position.
Methods: The images of biplanar slot-scanning full-body stereoradiography in 140 healthy Japanese volunteers (mean age, 39.5 years; 59.
Association of age and spinopelvic function in patients receiving a total hip arthroplasty.
Sci Rep
February 2023
Center for Musculoskeletal Surgery, Charité - Universitätsmedizin Berlin, Corporate Member of Freie Universität Berlin, Humboldt-Universität zu Berlin, Berlin, Germany.
Restricted spinopelvic mobility received attention as a contributing factor for total hip arthroplasty (THA) instability. However, it is still unknown, how the spinopelvic function is influenced by age. In identifying the patients at highest risk for altered spinopelvic mechanics the study aimed to determine the association of age on the individual segments of the spinopelvic complex and global spinal sagittal alignment in patients undergoing THA.
View Article and Find Full Text PDFDoes Total Hip Arthroplasty Affect Spinopelvic and Spinal Alignment?: A Prospective Observational Investigation.
Clin Spine Surg
October 2022
Center for Musculoskeletal Surgery, Charité-Universitätsmedizin Berlin, Corporate Member of Freie Universität Berlin and Humboldt-Universität zu Berlin.
Study Design: A prospective observational study, level of evidence 3.
Objectives: The study with patients undergoing unilateral total hip arthroplasty (THA) aimed to evaluate the following hypotheses: (1) the spinal sagittal and coronal alignment alters due to THA, (2) the spinopelvic parameter changes after THA, (3) the spinopelvic alignment differs between sagittal balanced and imbalanced patients.
Summary Of Background Data: Surgical correction of spinal sagittal misalignment affects the spinopelvic alignment and pelvic tilt.
Does obesity affect acetabular cup position, spinopelvic function and sagittal spinal alignment? A prospective investigation with standing and sitting assessment of primary hip arthroplasty patients.
J Orthop Surg Res
October 2021
Center for Musculoskeletal Surgery, Charité - Universitätsmedizin Berlin, Corporate Member of Freie Universität Berlin, Humboldt-Universität Zu Berlin, and Berlin Institute of Health, Berlin, Germany.
Background: Total hip arthroplasty (THA) instability is influenced by acetabular component positioning, spinopelvic function and sagittal spinal alignment. Obesity is considered as a risk factor of THA instability, but the causal relationship remains unknown. This study aimed to investigate the influence of BMI on (1) spinopelvic function (lumbar flexibility, pelvic mobility and hip motion), (2) sagittal spinal alignment pre- and postoperatively and (3) acetabular cup position postoperatively in primary THA patients in a prospective setting.
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