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Littérature scientifique sur le sujet « Lumbar strength »

Auteur : Grafiati

Publié le 2 juin 2025

Mis à jour le 31 juillet 2025

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Articles de revues sur le sujet "Lumbar strength"

&NA;. "Lumbar Extension Strength Training." Back Letter 13, no. 7 (1998): 74. http://dx.doi.org/10.1097/00130561-199807000-00003.

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Kumar, Gideon Praveen. "ASSESSMENT OF FATIGUE SUSCEPTIBILITY OF THE LUMBAR EXTENSOR MUSCLES AMONGST SMOKES." Biomedical Engineering: Applications, Basis and Communications 22, no. 04 (2010): 321–26. http://dx.doi.org/10.4015/s1016237210002055.

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Background: Smoking has a number of well-documented negative effects on health. The seemingly common knowledge is that smoking causes low back pain. Cigarette smoking is associated with poor physical fitness and reduced muscle strength.1 The specific effects of smoking on the efficacy of the lumbar extensors have been previously investigated where individuals with chronic low back pain often have weaker lumbar extensor muscles.2 Rigorous exercises, however, reverse this weakness. Hypothesis: This study hypothesizes that cigarette smoking is associated with deficits in the lumbar extensor stren

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Wilczyński, Jacek, and Alicja Kasprzak. "Dynamics of Changes in Isometric Strength and Muscle Imbalance in the Treatment of Women with Low back Pain." BioMed Research International 2020 (January 11, 2020): 1–8. http://dx.doi.org/10.1155/2020/6139535.

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The aim of the study was to evaluate the dynamics of isometric changes in strength and muscular lumbar-pelvic imbalances in the treatment of women with low back pain. Forty-one women, nineteen in the study group (A) and twenty-two in the control group (B), participated in the study. Magnetic resonance imaging (MRI) was performed to assess the degree of degenerative changes in the lumbar spine. The diagnosis of isometric muscle strength and their imbalances was performed with the Tergumed 700 device. After six weeks of therapy in the study group (A), there was a significant improvement in the s

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Ding, Baiyang, Kazuhiro Imai, and Jian Dong. "Biomechanical study of weightlifting behavior in L5 lumbar spondylolysis using finite element simulation." Molecular & Cellular Biomechanics 22, no. 4 (2025): 1456. https://doi.org/10.62617/mcb1456.

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Lumbar spondylolysis is related to weightlifting. The biomechanics of lumbar spondylolysis in weightlifting and the connection between lumbar spondylolysis and muscles are still unclear. Therefore, this study clarified the influence of decreased muscle strength on lumbar spondylolysis through finite element (FE) analysis. We used computed tomography to scan the L1-S1 segment of the patient and constructed a three-dimensional FE model. Apply a moment of 7.5 N·m and a weight of 280 N at the top of L1 after fixing the sacroiliac joint. The dumbbell weight was set to 15 kg. Apply muscle strength a

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Joshi, Gayatri, Himanshu Pathak, and Vijaya Bagade. "The Effect of Heel Height on Balance, Lumbar Lordosis and Core Muscle Strength among Young Healthy Indian Females." International Journal of Health Sciences and Research 14, no. 1 (2024): 135–42. http://dx.doi.org/10.52403/ijhsr.20240117.

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Background: High heels are commonly used by young females on daily basis. Increase in heel height cause shortening of calf muscles which affects body’s dynamic balance. Anterior tilting of pelvis leads to increase in lumbar lordosis which exert stress on muscles around lumbar spine and weakness of core muscles. In the present study, an attempt has been made to compare the high heel users with flat footwear users to find the effects on balance, lumbar lordosis and core muscle strength. Methodology: Fifty subjects fulfilling the inclusion and exclusion criteria were randomly allocated into two g

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Silva, Diego Augusto Santos, Eliane Cristina de Andrade Gonçalves, Leoberto Ricardo Grigollo, and Edio Luiz Petroski. "Factors associated with low levels of lumbar strength in adolescents in Southern Brazil." Revista Paulista de Pediatria 32, no. 4 (2014): 360–66. http://dx.doi.org/10.1590/s0103-05822014000400012.

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OBJECTIVE: To determine the prevalence and factors associated with low levels of lumbar strength in adolescents.METHOD: This was a cross-sectional study involving 601 adolescents, aged 14 to 17 years, enrolled in public schools in the western region of Santa Catarina State - Southern Brazil. Lumbar strength was analyzed by the lumbar extension test developed by the Canadian Society of Exercise Physiology, which proposes different cutoffs for boys and girls. Independent variables were sex, age, socioeconomic status, dietary habits, alcohol consumption, physical activity, and aerobic fitness. Fo

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Zhou, Zeyu. "Progress of core strength training intervention for lumbar disc herniation." Highlights in Science, Engineering and Technology 54 (July 4, 2023): 94–99. http://dx.doi.org/10.54097/hset.v54i.9740.

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Core strength training is a highly functional form of training, because it has excellent features like less side effects and less money, so it does not cause a lot of stress to patients both physiologically and psychologically, and nowadays it is extensively used in the intervention of lumbar disc herniation;this type of training is aimed at muscles deep in the core area of the body, core strength can increase trunk stability and reduce injury.In recent years, there have been new developments in the way core strength training is applied, a number of research has demonstrated the effectiveness

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Nakai, Yuki, Katsutoshi Oe, Ryuko Matsuno, et al. "Effect of Self-Myofascial Release of the Lower Back on Myofascial Gliding, Lumbar Flexibility, and Abdominal Trunk Muscle Strength: A Crossover Study." Sports 11, no. 8 (2023): 147. http://dx.doi.org/10.3390/sports11080147.

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Roller massage has been recognized as an effective intervention for managing various conditions. However, data on the effects of roller massage on the dynamic mechanisms of the myofascial and soft tissues of the lower back are limited. This study aimed to examine the effect of the self-myofascial release of the lower back on myofascial gliding, lumbar flexibility, and abdominal trunk muscle strength using a roller massager. This crossover study included 24 college athletes who underwent three interventions—roller massage, static stretching, and control (rest). Before and after the intervention

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Srinivasa, Sridevi Nangali. "Linking histopathological changes in intervertebral disc with lumbar muscles strength." Bioinformation 19, no. 7 (2023): 810–15. http://dx.doi.org/10.6026/97320630019810.

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Low back pain (LBP) is a painful condition affecting 80% of word population at some point in their life. Lumbar intervertebral disc degeneration and reduced muscle force is one the major cause of LBP. Sixty-two patients with LBP undergoing discectomy were recruited after receiving consent. Lumbar muscles strength and VAS (visual analogue scale) for lumbar pain were checked, MRI scan were analysed. Histological degenerative changes were analysed. The study revealed histological degeneration at intervertebral disc has direct effect on increase in pain at lumbar region, decrease in strength of lu

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Morningstar, Mark W. "Strength gains through lumbar lordosis restoration." Journal of Chiropractic Medicine 2, no. 4 (2003): 137–41. http://dx.doi.org/10.1016/s0899-3467(07)60077-9.

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Thèses sur le sujet "Lumbar strength"

Buckenmeyer, Laura. "Optimization of Pedicle Screw Depth in the Lumbar Spine: Biomechanical Characterization of Screw Stability and Pullout Strength." University of Toledo / OhioLINK, 2013. http://rave.ohiolink.edu/etdc/view?acc_num=toledo1365099627.

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Masaki, Mitsuhiro. "Studies on sagittal spinal alignment in middle-aged and elderly women and on strength training of lumbar back muscles." 京都大学 (Kyoto University), 2016. http://hdl.handle.net/2433/215469.

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Altunsoz, Omur Serdal. "Determine The Effects Of Long Term Playing Soccer On The Degeneration Of Lumbar Spine." Master's thesis, METU, 2006. http://etd.lib.metu.edu.tr/upload/12607487/index.pdf.

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The main purpose of this study was to determine whether playing soccer at high intensity training for a long period causes degeneration of the lumbar spine or not. This degeneration may occur without any symptoms or low back pain. Results of the present study were discussed in the framework of lumbar disc degeneration, trunk strength, lumbar and hip bone mineral density, trunk flexibility, activity MET scores for active and veteran soccer groups. There have been four subject groups in this study (15 active soccer players, 15 sedentary participants, 14 veteran soccer players, 13 sedentary parti

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Song, Ino. "The effect of variations in the strength and type of spinal muscles on the stabilization of the lumbar spine via follower compressive load mechanism." Thesis, University of Iowa, 2017. https://ir.uiowa.edu/etd/5638.

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The ligamentous human lumbar spine is considered as a long and slender column, which can be buckled when subjected to the axial compressive load even less than 100N. However, previous in vivo study showed that the compressive force acting on the spine predicted by intradiscal pressure was exceed 2600N. Meanwhile, recent experiments suggested that, when the compressive force is subjected to the lumbar spine along the spinal curvature (follower load), the lumbar spine may support up to a compressive force of 1200N without buckling while maintaining its flexibility. Since such a follower load is

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Silva, Lincoln da. "Proposta de método de avaliação da força de extensão lombar por meio da dinamometria." Universidade do Estado de Santa Catarina, 2015. http://tede.udesc.br/handle/handle/327.

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Made available in DSpace on 2016-12-06T17:07:06Z (GMT). No. of bitstreams: 1 Lincoln.pdf: 1533006 bytes, checksum: ae93ee7385384ea081f013ac9aaded2d (MD5) Previous issue date: 2015-09-25 Coordenação de Aperfeiçoamento de Pessoal de Nível Superior This study aimed to propose a method for assessing isometric strength of lumbar extension by dynamometry, aiming to investigate the possibility of estimating the functional capacity of the trunk extensor muscles in office workers. The Sociodemographic, anthropometric, clinical characteristics, functional capacity and isometric muscle strength o

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Janulis, Marius. "Liemens raumenų izometrinės jėgos, simetriškumo ir gyvenimo pilnatvės kaita atliekant stuburo stabilizavimo ir laikysenos korekcijos pratimus asmenims, kuriems diagnozuota juosmeninės stuburo dalies išvarža." Master's thesis, Lithuanian Academic Libraries Network (LABT), 2013. http://vddb.laba.lt/obj/LT-eLABa-0001:E.02~2013~D_20130613_144432-76257.

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Tyrimo tikslas – įvertinti liemens raumenų izometrinės jėgos, simetriškumo ir gyvenimo pilnatvės kaitą po taikytos stuburo stabilizavimo ir laikysenos korekcijos programos asmenims, kuriems diagnozuota juosmeninės stuburo dalies išvarža bei vargina lėtinis apatinės nugaros dalies skausmas. Uždaviniai: 1. Įvertinti vyrų ir moterų, kuriuos vargina lėtinis apatinės nugaros dalies skausmas, nugaros, pilvo bei liemens šoninių raumenų izometrinės jėgos kaitą po taikytos kineziterapijos; 2. Įvertinti vyrų ir moterų nugaros-pilvo bei liemens šoninių raumenų izometrinės jėgos santykio kaitą po taikytos

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Higgins, Edward Donald. "The strength of bonded wood strand composites." Thesis, University of British Columbia, 1990. http://hdl.handle.net/2429/30613.

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A method for modelling the strength of bonded wood strands which are oriented principally in one direction is proposed. The hypothesis tested was that strand grain orientation data, fitted to a von Mises probability distribution, could be used in an analysis for estimating the potential tensile strength of an ideally bonded composite. The strand strength, resolved at any loading angle with respect to the principal composite strand orientation axis, was multiplied by the distribution probability at that angle. When integrated over all angles, this product yielded the mathematical expectation of

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Santos, Marta Silva. "A importância do core na funcionalidade de jovens adultos." Pós-Graduação em Educação Física, 2018. http://ri.ufs.br/jspui/handle/riufs/7842.

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In recent years, the scientific community has emphasized the importance of the core both in the sports context and in rehabilitation. The core is an area of the body, responsible for generating force from the center and dissipating it to the extremities. In this perspective, specific exercises have been used for this area in functional training, in order to promote improvements in functional and core performance. However, it is not clear in what magnitude the core actually participates in performing functional actions in young adults and yet whether the inclusion of core-specific physical exer

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Cai, Yanling. "Statistical methods for relating strength properties of dimensional lumber." Thesis, University of British Columbia, 2015. http://hdl.handle.net/2429/54404.

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We present a novel approach for predicting one lumber strength property from another, each being measured destructively. The objective is to reduce the cost of lumber monitoring programs, by measuring one of the properties and predicting the other. To reach the objective, we review single proof load design (SPLD) proposed to assess dependence between two jointly normally distributed random variables X and Y that cannot be observed simultaneously. The SPLD tests specimens in one mode X up to a determined load (proof loading), and the survivors are tested to failure in a second mode Y. To resolv

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Nava, Guilherme Thomaz de Aquino [UNESP]. "Avaliação das respostas neuromusculares durante atividades funcionais em adultos com dor lombar crônica idiopática." Universidade Estadual Paulista (UNESP), 2017. http://hdl.handle.net/11449/150244.

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Submitted by GUILHERME THOMAZ DE AQUINO NAVA null (gtanava@gmail.com) on 2017-04-11T22:09:25Z No. of bitstreams: 1 Dissertação completa 11.04.17.pdf: 1432186 bytes, checksum: 8e046f8b963abbcce7de1c7843bdc403 (MD5) Approved for entry into archive by Luiz Galeffi (luizgaleffi@gmail.com) on 2017-04-17T19:39:39Z (GMT) No. of bitstreams: 1 nava_gta_me_rcla.pdf: 1432186 bytes, checksum: 8e046f8b963abbcce7de1c7843bdc403 (MD5) Made available in DSpace on 2017-04-17T19:39:39Z (GMT). No. of bitstreams: 1 nava_gta_me_rcla.pdf: 1432186 bytes, checksum: 8e046f8b963abbcce7de1c7843bdc403 (MD5) P

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Livres sur le sujet "Lumbar strength"

Arthur, Jones, ed. Safe, specific testing and rehabilitative exercise for the muscles of the lumbar spine. Sequoia Communications, 1988.

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Showalter, K. L. Effect of length on tensile strength in structural lumber. U.S. Dept. of Agriculture, Forest Service, Forest Products Laboratory, 1987.

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Link, Carol L. Statistical considerations in duration of load research. U.S. Dept. of Agriculture, Forest Service, Forest Products Laboratory, 1988.

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1963-, Terry Angela M., and Forest Products Laboratory (U.S.), eds. Gripped-end effect in tension proof testing of dimension lumber. U.S. Dept. of Agriculture, Forest Service, Forest Products Laboratory, 1991.

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Johnson, Richard Arnold. Some bivariate distributions for modeling the strength properties of lumber. U.S. Dept. of Agriculture, Forest Service, Forest Products Laboratory, 1999.

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W, Green David, and Forest Products Laboratory (U.S.), eds. Moisture content and tensile strength of Douglas fir dimension lumber. U.S. Dept. of Agriculture, Forest Service, Forest Products Laboratory, 1990.

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Johnson, Richard Arnold. Some bivariate distributions for modeling the strength properties of lumber. U.S. Dept. of Agriculture, Forest Service, Forest Products Laboratory, 1999.

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A, Johnson Richard. Some bivariate distributions for modeling the strength properties of lumber. U.S. Dept. of Agriculture, Forest Service, Forest Products Laboratory, 1999.

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Link, Carol L. Estimation and confidence intervals for parameters of a cumulative damage model. U.S. Dept. of Agriculture, Forest Service, Forest Products Laboratory, 1988.

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Chapitres de livres sur le sujet "Lumbar strength"

Wang, Shanlin, Kun Wang, Tianhui Wang, and Jianjun Zhang. "Biomechanical Analysis of Forward Driving Posture Based on Human Musculoskeletal Model." In Lecture Notes in Mechanical Engineering. Springer Nature Singapore, 2025. https://doi.org/10.1007/978-981-97-7887-4_75.

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Abstract Lower back pain in drivers of specialized vehicles may be related to excessive lumbar spine loading. The purpose of this study was to investigate human lumbar spine loads and lumbar muscle forces in a forward-flexed driving position in a specialty vehicle to better understand lower back pain and improve the design of automotive seats. The results of the study showed that the driver's lumbar load and lumbar muscle strength tended to increase and then decrease with the increase of the forward flexion angle at different forward flexion angles, and the lumbar spine load and lumbar muscle

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Zhou, Haibin. "Strength Properties of Structural FJ Chinese Fir Lumber." In Future Control and Automation. Springer Berlin Heidelberg, 2012. http://dx.doi.org/10.1007/978-3-642-31003-4_29.

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Awang, Haryati, and Noor Akma Mohd Naru. "Predicting Uniaxial Compression Strength (UCS) Using Bulk Density for Kuala Lumpur Granite and Limestone." In InCIEC 2014. Springer Singapore, 2015. http://dx.doi.org/10.1007/978-981-287-290-6_49.

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Kulkarni, Abhijit, and Behrouz Shafei. "Optimal Use of UHPC in Wall Systems to Mitigate Windborne Debris Hazard." In Lecture Notes in Civil Engineering. Springer Nature Switzerland, 2025. https://doi.org/10.1007/978-3-031-69626-8_105.

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AbstractUltra-high-performance concrete (UHPC) is known to exhibit superior performance compared to conventional concrete. The applications of UHPC within structural engineering have been largely focused on its behavior under conventional loads. While the behavior of UHPC structural members has been thoroughly investigated under conventional loads, a literature gap exists regarding its application as a protective system against windborne debris impact. It is important to note that windborne debris stands as a primary cause of damage to building envelopes during severe wind events like tornadoe

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"DETECTION OF SUBMAXIMAL EFFORT IN ISOMETRIC LUMBAR EXTENSION STRENGTH ASSESSMENT." In Contemporary Ergonomics. CRC Press, 1994. http://dx.doi.org/10.1201/9781482272574-45.

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Duance, Victor, and Sally Roberts. "The intervertebral disc—structure, composition, and pathology." In Oxford Medical Publications Soft Tissue Rheumatology. Oxford University PressNew York, NY, 2004. http://dx.doi.org/10.1093/oso/9780192630933.003.0004.

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Abstract The spine is a complex structure comprised of vertebrae, muscles and ligaments that combine to provide both strength and flexibility. To enable extension, flexion, lateral bending, and rotation each vertebral body is interposed with a soft deformable tissue, the intervertebral disc.(1) There are 24 intervertebral discs in the human spine, 7 in the cervical, 12 in the thoracic, and 5 in the lumbar regions (Fig. 1). The overall function of the intervertebral discs is to absorb and dissipate the high compressive and torsional forces experienced by the spine without compromising its flexi

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Kansara, Dr Viral, and Dr Darshana Tadvi. "CONSERVATIVE MANAGEMENT FOR CONGENITAL SCOLIOSIS: A CASE REPORT." In Futuristic Trends in Medical Sciences Volume 3 Book 3. Iterative International Publishers, Selfypage Developers Pvt Ltd, 2024. http://dx.doi.org/10.58532/v3bdms3p5ch8.

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This is the case report of a 11-year-old girl diagnosed with Congenital Scoliosis thoraco-lumbar cobb’s angle 30°, conservatively managed as the parents were not in capacity to buy braces or have surgery. Intervention: She was treated conservatively with flexibility training, strength training, self-active correction exercises, habitual corrections, task oriented training and home exercise protocol and patient/parents education. Results: After 6 months of treatment there no change in cobb’s angle. But Posture, Muscle strength(MMT), and Range of motion(ROM) where showing significant change. Con

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Patel, Niketa, Deepali Dinesh Patil, and Lata Parmar. "Determining the Relationship between Transversus Abdominis Strength and Lumbar Lordosis in Young Adults." In Recent Developments in Medicine and Medical Research Vol. 10. Book Publisher International (a part of SCIENCEDOMAIN International), 2021. http://dx.doi.org/10.9734/bpi/rdmmr/v10/2805e.

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Hobatho Marie-Christine, Rho Jae Y., and Ashman Richard B. "Anatomical Variation Of Human Cancellous Bone Mechanical Properties In Vitro." In Studies in Health Technology and Informatics. IOS Press, 1997. https://doi.org/10.3233/978-1-60750-884-7-157.

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The aim of the study was to assess mechanical properties of human cancellous bone in vitro. Six hundred cubic specimens of cancellous bone were obtained from the tibia, femur, patella, lumbar spine and humerus of eight subjects. The elastic properties were assessed using an ultrasonic transmission technique developed and validated by Ashman (1). The results showed that differences exist between subjects significantly (p&lt;0.05) and that the mechanical properties vary along the length and the periphery (about a factor 3 to 5). Cancellous bone should be considered heterogeneous and as ortho

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Shivers, Joseph P., and Christopher J. Standaert. "A “Clunk” in the Night: A 51-Year-Old Female with Back Pain." In Low Back Pain. Oxford University PressNew York, 2024. http://dx.doi.org/10.1093/med/9780197652848.003.0010.

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Abstract Degenerative spondylolisthesis becomes more common with age and may be associated with low back pain (LBP) and leg pain. “Spondylolisthesis” describes the anterior/forward displacement of one vertebral body over another. In degenerative spondylolisthesis, the underlying problem is laxity in the facet joints and degenerative change in the disc allowing the vertebra to “slip.” More common in women than men, in Black than White people, and after age 50, degenerative spondyoloisthesis occurs most often at the L4/L5 level, LBP, leg pain, leg weakness, and occasionally a sensation of “clunk

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Actes de conférences sur le sujet "Lumbar strength"

Domi, Albi, David Barreto, Enrie Gan, et al. "Automated Mr Lumbar Vertebrae Analysis: 3D U-Net and Finite Element Analysis for Precise Segmentation and Robust Bone Strength Assessment." In 2024 IEEE International Symposium on Biomedical Imaging (ISBI). IEEE, 2024. http://dx.doi.org/10.1109/isbi56570.2024.10635350.

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Fuchita, Yasuhiro, Toshiharu Nakanishi, Yuya Hayashi, Makoto Nakamura, and Masanori Fujita. "Bending test of the laminated veneer lumber beam with screws or bolts." In IABSE Symposium, Tokyo 2025: Environmentally Friendly Technologies and Structures: Focusing on Sustainable Approaches. International Association for Bridge and Structural Engineering (IABSE), 2025. https://doi.org/10.2749/tokyo.2025.2788.

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In recent years, there has been an increase in the construction of mid- to high-rise buildings using wood for structural members. Laminated veneer lumber (LVL), in which the wood fibers run in one direction, is advantageous in transmitting shear and bending stresses in columns and beams of long members. Thus, veneer laminated lumber is arranged so that the beam direction is the strong axis, and each LVL material is dry-joined. Bending tests are conducted using the pitch of screws and bolts used for joining and the number of LVL lumber as parameters. To simplify construction, the pitch

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Rundell, S. A., J. Isaza, J. S. Day, S. Guillory, W. N. Newberry, and S. M. Kurtz. "The Importance of Posterior Muscle Strength and Facet Contact in Preventing Lumbar Disc Herniation During Forward Bending." In ASME 2010 Summer Bioengineering Conference. American Society of Mechanical Engineers, 2010. http://dx.doi.org/10.1115/sbc2010-19468.

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During forward bending, a combination of compression, anterior shear, and flexion moment is applied to the lumbar spine due to upper body weight. A combination of posterior muscle and ligament forces must be generated in order to prevent excessive motion and restore upright posture. It is generally believed that forward bending to 90 degrees while maintaining a straight or extended lumbar spine is biomechanically favorable compared to lifting with a rounded back [1]. A simple biomechanical model of the lumbar spine during bending in which the vertical force from upper body weight is balanced w

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Chu, Bryant, Jeremi Leasure, and Dimitriy Kondrashov. "Selective Densitometry of the Lumbar Spine." In ASME 2013 Summer Bioengineering Conference. American Society of Mechanical Engineers, 2013. http://dx.doi.org/10.1115/sbc2013-14218.

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Bone mineral density (BMD) has been identified as a major factor in spine construct strength, with failures resulting in pedicle screw loosening and pullout2. Computed tomography (CT) scans have been shown to effectively measure BMD1,4. Previous research has utilized this linear correlation of CT Hounsfield Units (HU) to BMD in order to determine BMD as a function of anatomic location within cervical vertebrae1; however, the lumbar spine has not yet been reported on. The goal of this study was to describe BMD of anatomical regions within lumbar vertebrae using the correlation between HU and BM

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Uppala, Subramanya, Robert X. Gao, Scott Cowan, and K. Francis Lee. "A Biomechanical Model of Lumbar Spine." In ASME 2000 International Mechanical Engineering Congress and Exposition. American Society of Mechanical Engineers, 2000. http://dx.doi.org/10.1115/imece2000-2282.

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Abstract The strength and stability of the lumbar spine are determined not only by the bone and muscles, but also by the visco-elastic structures and the interplay between the different components of the spine, such as ligaments, capsules, annulus fibrosis, and articular cartilage. In this paper we present a non-linear three-dimensional Finite Element model of the lumbar spine. Specifically, a three-dimensional FE model of the L4-5 one-motion segment/2 vertebrae was developed. The cortical shell and the cancellous bone of the vertebral body were modeled as 3D isoparametric eight-nodal elements

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Dickerson, Clark R., Subrata Saha, and Charlotte Hotchkiss. "QCT Cortical Shell Thickness as a Predictor of Vertebral Body Strength for Cynomolgus Monkeys." In ASME 1999 International Mechanical Engineering Congress and Exposition. American Society of Mechanical Engineers, 1999. http://dx.doi.org/10.1115/imece1999-0437.

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Abstract Many studies have investigated the ability of vertebral trabecular BMC measurements to predict overall vertebral strength. Far fewer investigations, however, have examined the use of cortical shell data to predict maximum strength. In this study, we are investigating the load-carrying characteristics of the cortical region of vertebral bodies Lumbar vertebrae from macaca fascicularis were examined by QCT and mechanically tested in compression. Our results show that cortical thickness, as determined by QCT, is a significant predictor of vertebral maximum stress (R = 0.62, p &lt; 1

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Pfeiffer, Ferris M., and Dennis L. Abernathie. "The Influence of Facet Fusion Strength on Instrumented Segment Range of Motion." In ASME 2007 2nd Frontiers in Biomedical Devices Conference. ASMEDC, 2007. http://dx.doi.org/10.1115/biomed2007-38082.

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Spinal fusion surgery is one of the most common surgical procedures used to alleviate lower back pain. It is estimated that between 200,000 and 300,000 spine fusion procedures performed each year in the United States [1]. There has been an increase of approximately 8% per year in the frequency of lumbar fusions in the United States since 1980 [2]. Spinal fusion is indicated for treatment of degenerative disk disease, degenerative joint disease, scoliosis, and isthmic and degenerative spondlylotisthesis when more conservative treatments have failed to achieve relief.

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Buckenmeyer, Laura E., Kristophe J. Karami, Ata M. Kiapour, Vijay K. Goel, Teck M. Soo, and Constantine K. Demetropoulos. "Optimization of Pedicle Screw Depth in the Lumbar Spine." In ASME 2013 Summer Bioengineering Conference. American Society of Mechanical Engineers, 2013. http://dx.doi.org/10.1115/sbc2013-14322.

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Optimization of pedicle screw insertion depth for ideal fixation and fusion remains a clinical challenge. Improved screw purchase may improve fixation strength 1, which is especially critical in an osteoporotic patient population. Extended screw insertion depths, up to and through the anterior cortex, have yet to be compared to more commonly used shorter pedicle screws in a laboratory controlled series of experiments. The purpose of this study is to evaluate screw purchase in the osteoporotic lumbar spine as a function of insertion depth, which may be used to optimize pedicle screw-rod constru

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Liddle, Kate D., Michael A. Tufaga, Glenn Diekmann, et al. "Assessment of Cancellous Bone Strength in the Lumbar Spine Using a “Smart” Ball-Tip Probe." In ASME 2010 Summer Bioengineering Conference. American Society of Mechanical Engineers, 2010. http://dx.doi.org/10.1115/sbc2010-19121.

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Failure of the pedicle screw at the screw-bone interface is a common clinical problem, particularly in the setting of osteoporosis, and poses reconstructive challenges for all orthopaedic surgeons. Pedicle screw failure through screw loosing and pull-out is highly correlated with bone mineral density (BMD) and local bone quality [1]. Pre-operative assessment of BMD via dual x-ray absorptiometry (DEXA) has been shown to help determine the need for screw augmentation. However, patients frequently present without pre-operative DEXA scans. Furthermore, DEXA scans provide a measure of general bone

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Yoshida, Michihiro, Tanaka Takayuki, and Yoshio Tsuchiya. "Modeling of changes in lumbar joint stiffness by pelvic tightening based on physique and pelvic alignment." In 13th International Conference on Applied Human Factors and Ergonomics (AHFE 2022). AHFE International, 2022. http://dx.doi.org/10.54941/ahfe1002614.

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We have been elucidated the mechanism by which pelvic belt reduces lumbar burden. Pelvic tightening increases the lumbar joint stiffness and inhibits the flexion of the lumbar spine in the forward bending. Flexion of the lumbar joint is substituted by the hip joint, which corrects the posture during forward bending and reduces the lumbar burden (lumbar joint torque). The level of the assisting effect of the tightening force has the individual difference, but at present, it is not clear what factors cause it. In this study, we develop a model that represents the assistance effect based on the p

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Rapports d'organisations sur le sujet "Lumbar strength"

Verrill, Steve, David E. Kretschmann, and James W. Evans. Simulations of solid lumber strength property monitoring tests. U.S. Department of Agriculture, Forest Service, Forest Products Laboratory, 2017. http://dx.doi.org/10.2737/fpl-rp-684.

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Verrill, Steve P., Frank C. Owens, David E. Kretschmann, and Rubin Shmulsky. A fit of a mixture of bivariate normals to lumber stiffness—strength data. U.S. Department of Agriculture, Forest Service, Forest Products Laboratory, 2018. http://dx.doi.org/10.2737/fpl-rp-696.

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Franca, Frederico J. N., R. Daniel Seale, Robert J. Ross, Rubin Shmulsky, and Tamara S. F. Amorim Franca. Using transverse vibration nondestructive testing techniques to estimate stiffness and strength of southern pine lumber. U.S. Department of Agriculture, Forest Service, Forest Products Laboratory, 2018. http://dx.doi.org/10.2737/fpl-rp-695.

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Johnson, Richard A., James W. Evans, and David W. Green. Confidence intervals for predicting lumber strength properties based on ratios of percentiles from two Weibull populations. U.S. Department of Agriculture, Forest Service, Forest Products Laboratory, 2003. http://dx.doi.org/10.2737/fpl-rp-606.

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Schiller, Brandon, Tara Hutchinson, and Kelly Cobeen. Cripple Wall Small-Component - Test Program: Comparisons (PEER-CEA Project). Pacific Earthquake Engineering Research Center, University of California, Berkeley, CA, 2020. http://dx.doi.org/10.55461/lohh5109.

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This report is one of a series of reports documenting the methods and findings of a multi-year, multi-disciplinary project coordinated by the Pacific Earthquake Engineering Research Center (PEER) and funded by the California Earthquake Authority (CEA). The overall project is titled “Quantifying the Performance of Retrofit of Cripple Walls and Sill Anchorage in Single-Family Wood-Frame Buildings,” henceforth referred to as the “PEER–CEA Project.” The overall objective of the PEER–CEA Project is to provide scientifically based information (e.g., testing, analysis, and resulting loss models) that

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Schiller, Brandon, Tara Hutchinson, and Kelly Cobeen. Cripple Wall Small-Component Test Program: Wet Specimens II (PEER-CEA Project). Pacific Earthquake Engineering Research Center, University of California, Berkeley, CA, 2020. http://dx.doi.org/10.55461/ldbn4070.

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This report is one of a series of reports documenting the methods and findings of a multi-year, multi-disciplinary project coordinated by the Pacific Earthquake Engineering Research Center (PEER and funded by the California Earthquake Authority (CEA). The overall project is titled “Quantifying the Performance of Retrofit of Cripple Walls and Sill Anchorage in Single-Family Wood-Frame Buildings,” henceforth referred to as the “PEER–CEA Project.” The overall objective of the PEER–CEA Project is to provide scientifically based information (e.g., testing, analysis, and resulting loss models) that

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Schiller, Brandon, Tara Hutchinson, and Kelly Cobeen. Comparison of the Response of Small- and Large-Component Cripple Wall Specimens Tested under Simulated Seismic Loading (PEER-CEA Project). Pacific Earthquake Engineering Research Center, University of California, Berkeley, CA, 2020. http://dx.doi.org/10.55461/iyca1674.

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This report is one of a series of reports documenting the methods and findings of a multi-year, multi-disciplinary project coordinated by the Pacific Earthquake Engineering Research Center (PEER and funded by the California Earthquake Authority (CEA). The overall project is titled “Quantifying the Performance of Retrofit of Cripple Walls and Sill Anchorage in Single-Family Wood-Frame Buildings,” henceforth referred to as the “PEER–CEA Project.” The overall objective of the PEER–CEA Project is to provide scientifically based information (e.g., testing, analysis, and resulting loss models) that

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