A database of lumbar spinal mechanical behavior for validation of spinal analytical models.
نویسندگان
چکیده
Data from two experimental studies with eight specimens each of spinal motion segments and/or intervertebral discs are presented in a form that can be used for comparison with finite element model predictions. The data include the effect of compressive preload (0, 250 and 500N) with quasistatic cyclic loading (0.0115Hz) and the effect of loading frequency (1, 0.1, 0.01 and 0.001Hz) with a physiological compressive preload (mean 642N). Specimens were tested with displacements in each of six degrees of freedom (three translations and three rotations) about defined anatomical axes. The three forces and three moments in the corresponding axis system were recorded during each test. Linearized stiffness matrices were calculated that could be used in multi-segmental biomechanical models of the spine and these matrices were analyzed to determine whether off-diagonal terms and symmetry assumptions should be included. These databases of lumbar spinal mechanical behavior under physiological conditions quantify behaviors that should be present in finite element model simulations. The addition of more specimens to identify sources of variability associated with physical dimensions, degeneration, and other variables would be beneficial. Supplementary data provide the recorded data and Matlab® codes for reading files. Linearized stiffness matrices derived from the tests at different preloads revealed few significant unexpected off-diagonal terms and little evidence of significant matrix asymmetry.
منابع مشابه
Estimation of spinal loads using a detailed finite element model of the L4-L5 lumbar segment derived by medical imaging kinematics; a feasibility study
Introduction: Low back pain is the most prevalent orthopedic disorder and the first main cause of poor working functionality in developed as wells as many developing countries. In Absence of noninvasive in vivo measurement approaches, biomechanical models are used to estimate mechanical loads on human joints during physical activities. To estimate joint loads via musculoskelet...
متن کاملReliability and Validity of the Swiss Spinal Stenosis Questionnaire for Iranian Patients with Lumbar Spinal Stenosis
Background: The purpose of this study was validation of the Persian translation of the Swiss Spinal StenosisQuestionnaire in order to be used by Iranian researchers.Methods: A total of 104 patients with spinal stenosis diagnosis, who were candidates for operative treatment wereentered into the study. The patients completed the translated questionnaire in the 1st and the 7th days of admissionand...
متن کاملFrequency of Diabetes Mellitus in Patients with Lumbar Spinal Canal Stenosis
Abstract Objective: Diabetes mellitus (DM) is a systemic disease affecting different tissues. Hyperglycemia due to DM can lead to degenerative changes in spinal tissue. Also low data have examined the prevalence of diabetes mellitus in lumbar spinal canal stenosis individuals. Therefore the purpose of this study was determining the frequency of DM in lumbar spinal canal stenosis patients. ...
متن کاملEffect of Spinal Nerve Ligation after Endurance Training on the Gene Expression of MST1 and MAFbx in Plantaris Muscle of Male Wistar Rats
Background and purpose: Reduction of muscle mass occurs in some models of muscle atrophy during mechanical unloading status and MST1 and MAFbx genes are believed to have a role. In the present study, the effect of reduced physical activity in the form of spinal nerve ligation (SNL) after a period of endurance training (ET) on the expression of MST1 and MAFbx genes were examined in the rat plant...
متن کاملEffect of Physiological Noise on Thoraco-lumbar Spinal Cord FMRI in 3T Magnetic Field
Introduction: Functional MRI methods have been used to study sensorimotor processing in the Spinal cord. However, these techniques confront unwanted contributions to the measured signal from the physiological fluctuations. For the spinal cord imaging, most of the challenges are consequences of cardiac and respiratory movement artifacts that are considered as significant sources of noise, especi...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
برای دانلود متن کامل این مقاله و بیش از 32 میلیون مقاله دیگر ابتدا ثبت نام کنید
ثبت ناماگر عضو سایت هستید لطفا وارد حساب کاربری خود شوید
ورودعنوان ژورنال:
- Journal of biomechanics
دوره 49 5 شماره
صفحات -
تاریخ انتشار 2016