Influences of the Location of Vertebral “IAR” on Cervical Spine Kinematics
نویسندگان
چکیده
Different spine models have placed the IAR at various locations in the spine; more commonly, the central region of the intervertebral disk, the middle region of the subjacent vertebra, and the central region of the vertebral body. A computer simulation model of the cervical spine (C2-T1) was developed to investigate sagittal plane kinematics for different placements of the vertebral axis of rotation. Stiffness of the motion segment units was modeled with rotational springs. The combined loading vector applied to the spine replicated the in vitro experimental test results generated in our laboratory. Equal stiffnesses of each vertebra were used. The difference in force magnitude amongst the different cases was less than 1% of the applied load. Although the changes in rotational magnitudes were small, the relative differences varied not only with the different models, but also amongst the different vertebral levels.
منابع مشابه
Anterior Cervical Incision and Thoracotomy for Cervico-thoracic, Thoracic, and Thoracolumbar Spine Surgery: A Clinical Series
Introduction:Surgical treatment of diseases in cervicothoracic, thoracic and thoracolumbar regions can be a challenging issue. Cooperation of the thoracic surgeons and spine surgeons can improve the outcomes and decrease the complications of patients who underwent these approaches.Materials & Methods: The participants of this study consisted of seventeenpatients suffering from different types o...
متن کاملCervical spine functional anatomy and the biomechanics of injury due to compressive loading.
OBJECTIVE To provide a foundation of knowledge concerning the functional anatomy, kinematic response, and mechanisms involved in axial-compression cervical spine injury as they relate to sport injury. DATA SOURCES We conducted literature searches through the Index Medicus, SPORT Discus, and PubMed databases and the Library of Congress from 1975-2003 using the key phrases cervical spine injury...
متن کاملThe biomechanical assessment of the cervical inter-vertebral kinematics, between DDD patients ICR based study
It is very important to pay more attention to spine from the biomechanical perspective. It would allow the analysis of initial conditions of the vertebral disc degeneration syndrome and adopting of normal spine kinematics to compare and match it with a degenerated disc and providing a biomechanical index as an indicator for the conduct of any surgical intervention including arthroplasty to maxi...
متن کاملAllometric growth rate of the spinal cord in relation to the vertebral column during prenatal life in male and female goats (Capra hircus)
Total and regional allometric growth rates and termination sites of the spinal cord related to the respective vertebra were studied in 36 goat fetuses, from the Ahvaz slaughterhouse. These specimens were assigned to 3 groups, group 1 (CRL 10-20 cm), group 2 (CRL 21-30 cm), and group 3 (CRL 31-40 cm), each consisting of 6 male and 6 female fetuses. Observations in all 3 groups revealed that alth...
متن کامل