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Dissertations / Theses on the topic 'Spindle stiffness'

Author: Grafiati

Published: 28 June 2021

Last updated: 29 July 2025

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1

Chaigne, Agathe. "Cortical stiffness : a gatekeeper for spindle positioning in mouse oocytes." Thesis, Paris 6, 2014. http://www.theses.fr/2014PA066288/document.

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Les divisions méiotiques sont très asymétriques en taille et génèrent une très grosse cellule, l'ovocyte, et deux petites cellules, les globules polaires. Cette asymétrie est permise par la migration du fuseau lors de la première division jusqu'au cortex le plus proche. Cette migration ne dépend pas des microbutules mais de la Myosin-II et d'un réseau de filaments d'actine nucléé par la coopération des nucléateurs de filaments droits Formin-2 et Spire1/2. Des observations préliminaires effectuées au laboratoire ont décrit un épaississement du cortex d'actine pendant la migration du fuseau, mai

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Chaigne, Agathe. "Cortical stiffness : a gatekeeper for spindle positioning in mouse oocytes." Electronic Thesis or Diss., Paris 6, 2014. https://accesdistant.sorbonne-universite.fr/login?url=https://theses-intra.sorbonne-universite.fr/2014PA066288.pdf.

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Les divisions méiotiques sont très asymétriques en taille et génèrent une très grosse cellule, l'ovocyte, et deux petites cellules, les globules polaires. Cette asymétrie est permise par la migration du fuseau lors de la première division jusqu'au cortex le plus proche. Cette migration ne dépend pas des microbutules mais de la Myosin-II et d'un réseau de filaments d'actine nucléé par la coopération des nucléateurs de filaments droits Formin-2 et Spire1/2. Des observations préliminaires effectuées au laboratoire ont décrit un épaississement du cortex d'actine pendant la migration du fuseau, mai

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3

Sovadina, František. "Návrh vřeteníku soustruhu." Master's thesis, Vysoké učení technické v Brně. Fakulta strojního inženýrství, 2021. http://www.nusl.cz/ntk/nusl-443734.

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The thesis deals with the design and construction of headstocks of a turning centre. The aim is to design a spindle with an output of 20 kW and a maximum speed of 5000 1/min. The research part of the thesis is focused on the description of the basic parameters of the headstock and turning centres needed for the construction of the headstock and contains an analysis of the available spindles on the market. The next part of the thesis deals with the selection and calculation of cutting conditions and the necessary parameters. Analytical calculations are then verified using FEM analysis. At the e

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Laguna, Serrano Sergio. "Machining System Measurement and Modelling." Thesis, KTH, Industriell produktion, 2017. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-226333.

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Machine tools need to be tested to check they behave correctly while machining. A bigger production (capacity), improving the accuracy in final products (quality) or reducing costs are some of the main goals. Reducing the maintenance of the machines, their nonproductive time and a higher quality of the final parts, have a strong influence in the costs. Even machines built to the same specification present different properties and behaviours, which leads into a reduction of the flexibility when it comes to move operations among them. This study is focused on the measurement and modelling of fou

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Небога, Василь Ігорович, та Vasyl Neboha. "Дослідження жорсткісних характеристик станини фрезерного верстату". Master's thesis, Тернопільський національний технічний університет імені Івана Пулюя, 2018. http://elartu.tntu.edu.ua/handle/lib/26999.

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Роботу виконано на кафедрі конструювання верстатів, інструментів та машин Тернопільського національного технічного університету імені Івана Пулюя Міністерства освіти і науки України<br>У дипломній роботі розглянуті питання, які пов'язані з аналізом жорсткості несучої системи верстата, процесу механічної обробки деталі, дослідженням формоутворення та розробкою оптимальної компонувальної схеми верстата. Виконано проектний розрахунок та розробку окремих вузлів верстата. Виконано 3D моделювання корпусу (станини) верстата мод. 6Р13Ф3. Виконано статичний та модальний аналіз корпусу верстата.<br>The

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6

Dodgen, Eric Ray. "Spinal Implant with Customized and Non-Linear Stiffness." BYU ScholarsArchive, 2011. https://scholarsarchive.byu.edu/etd/2699.

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There is a need for spinal implants that have nonlinear stiffness to provide stabilization if the spine loses stiffness through injury, degeneration, or surgery. There is also a need for spinal implants to be customizable for individual needs, and to be small enough to be unobtrusive once implanted. Past and ongoing work that defines the effects of degeneration on the torque rotation curve of a functional spinal unit (FSU) were used to produce a spinal implant which could meet these requirements. This thesis proposes contact-aided inserts to be used with the FlexSuRe™ spinal implant to create

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Mirbagheri, M. Mehdi (Mohammad Mehdi). "Intrinsic and reflex stiffness in normal & spastic spinal cord injured subjects." Thesis, McGill University, 2000. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=36823.

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The contributions of stretch reflexes to overall joint stiffness are unknown in normal and pathological function. The main reason for this is difficulty in distinguishing the mechanical contributions of the two mechanisms. We used a new non-linear system identification technique to achieve this and address three specific objectives.<br>First, we identified intrinsic and reflex contributions to dynamic ankle stiffness over a wide range of tonic voluntary contraction levels and ankle positions in healthy human subjects (normals). Intrinsic and reflex dynamic stiffness were strongly modulated wit

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8

Moorhouse, Kevin Michael. "Role of Intrinsic and Reflexive Dynamics in the Control of Spinal Stability." Diss., Virginia Tech, 2005. http://hdl.handle.net/10919/29265.

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Spinal stability describes the ability of the neuromuscular system to maintain equilibrium in the presence of kinematic and control variability, and may play an important role in the etiology of low-back disorders (LBDs). The primary mechanism for the neuromuscular control of spinal stability is the recruitment and control of active paraspinal muscle stiffness (i.e., trunk stiffness). The two major components of active muscle stiffness include the immediate stiffness contribution provided by the intrinsic stiffness of actively contracted muscles, and the delayed stiffness contribution provid

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Zaragoza-Rivera, Yadetsie Nichole. "Pediatric Cervical Spine Range of Motion, Strength, and Stiffness in the Sagittal and Coronal Planes." The Ohio State University, 2020. http://rave.ohiolink.edu/etdc/view?acc_num=osu1587411565508067.

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10

Dmowski, Jan. "Design and evaluation of a non-invasive spinal indentation device for assessing stiffness of human musculoskeletal system." Thesis, National Library of Canada = Bibliothèque nationale du Canada, 1999. http://www.collectionscanada.ca/obj/s4/f2/dsk1/tape8/PQDD_0017/MQ47979.pdf.

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11

Lee, Patrick James. "Low Back Biomechanical Analysis of Isometric Pushing and Pulling Tasks." Thesis, Virginia Tech, 2005. http://hdl.handle.net/10919/30835.

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Few studies have investigated the neuromuscular recruitment and stabilizing control of the spine during pushing and pulling exertions. Past theoretical investigation suggest that co-contraction of the of the paraspinal muscles is necessary to stabilize the spine during pushing exertions. We hypothesized greater levels of co-contraction during pushing exertions. Co-contraction of trunk musculature was quantified during isometric pushing and pulling tasks. The mean value of co-contraction during pushing was two-fold greater (p < 0.01) than during extension. Co-contraction has been shown t

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Sunni, Nabeel Senussi. "A biomechanical investigation of fusionless growth modulation implants for spinal scoliosis treatment." Thesis, Queensland University of Technology, 2015. https://eprints.qut.edu.au/91388/4/Nabeel_Sunni_Thesis.pdf.

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This thesis studied a new minimally invasive implant for scoliosis correction that aims to correct the deformity without fusing the spine, thereby allowing movement and growth in the spine following surgery. The effect of two different vertebral body implant (staple) designs on the stiffness of the spine, using calf spines as an in vitro model, was studied. The results showed that the implants decreased spinal stiffness, with associated potential damage to the growth plates due to the staple tips. There were no significant differences in stiffness between the two staple designs tested.

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Horsley, B. "The Use of Triaxial Accelerometry for Measuring Stride Parameters and Vertical Stiffness in Team-Sport Athletes." Phd thesis, Australian Catholic University, 2024. https://acuresearchbank.acu.edu.au/download/671dc65e687fb9000b1fce6e0c2ee18bf846bee22a3e42e64ffae23b2c43f89d/5366624/Horsley_2024_The_Use_of_Triaxial_Accelerometry_for%5BREDACTED%5D.pdf.

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Inertial Measurement Units (IMUs) provide a means for analysing running gait in the field without the need for extensive lab-based equipment. These sensors have been validated for use on the lower limbs and lumbosacral region but have not been extensively validated at other body regions. In team-sport, athletes commonly wear global navigation satellite system (GNSS) units on the thoracic spine to quantify distance and speed. These GNSS units also contain IMUs which may allow the measurement of running gait characteristics, such as contact time, step length and vertical stiffness (Kvert), that

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14

Odet, Margot. "Étude biomécanique d’une suspension implantable pour la préservation des disques intervertébraux dans le traitement des scolioses infantiles." Thesis, Lyon, 2016. http://www.theses.fr/2016LYSE1135/document.

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La scoliose infantile est une déformation rachidienne évolutive survenant chez l'enfant de moins de 3 ans. La technique de correction la plus répandue actuellement est celle des « tiges de croissance ». Cependant, la rigidité du matériel provoque la dégénérescence des disques intervertébraux, ce qui di-minue l'efficacité du traitement. Des études récentes ont montré l'effet bénéfique d'implants flexibles sur les disques. Notre équipe a donc développé le concept d'une suspension implantable qui permet de garder la mobilité axiale des segments instrumentés, associé à un nouveau système de fixati

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Montanari, Sara. "The effect of intervertebral disc simulated damage on the human spine biomechanics." Master's thesis, Alma Mater Studiorum - Università di Bologna, 2020. http://amslaurea.unibo.it/19926/.

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More than 50% of intervertebral discs in the third and fourth decade of life exhibit annular tears and fissures with different orientations and extents. On the other hand, in vitro biomechanical investigations of the disc surgery treatment, sometimes requires collaterals lesions, such as incision or disc material removal to recreate biological injuries, as in discoplastly. These lesions could have a mechanical impact on the spine flexibility and in the surrounding tissue and could alter the final outcomes of in vitro studies. The influence of the presence of lesions on the biomechanics of the

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Santos, Rodrigo Silva e. "Caracterização da rigidez póstero-anterior da coluna lombar in vivo: uma análise biomecânica /." Guaratinguetá : [s.n.], 2007. http://hdl.handle.net/11449/105354.

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Orientador: Tamotsu Hirata<br>Banca: José Elias Tomazini<br>Banca: José Geraldo Trani Brandão<br>Banca: Rubens Corrêa Araújo<br>Banca: Mauro Gonçalves<br>Resumo: A mobilização póstero-anterior consiste numa técnica de terapia manual que tem a finalidade de detectar alterações no padrão normal e na amplitude dos movimentos das articulações intervertebrais em pacientes com lombalgia. Mecanicamente, define-se como uma sobrecarga de inclinação de três pontos e, embora, o procedimento de aplicação desta técnica tenha sido descrito, caracteriza-se por um método subjetivo de análise clínica. No senti

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17

Amankwah, Kofi. "THE IMPACT OF LOWER EXTREMITY PASSIVE JOINT PROPERTIES ON STANDING FUNCTION." Case Western Reserve University School of Graduate Studies / OhioLINK, 2004. http://rave.ohiolink.edu/etdc/view?acc_num=case1081532731.

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Santos, Rodrigo Silva e. [UNESP]. "Caracterização da rigidez póstero-anterior da coluna lombar in vivo: uma análise biomecânica." Universidade Estadual Paulista (UNESP), 2007. http://hdl.handle.net/11449/105354.

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Made available in DSpace on 2014-06-11T19:34:58Z (GMT). No. of bitstreams: 0 Previous issue date: 2007-02Bitstream added on 2014-06-13T20:45:40Z : No. of bitstreams: 1 santos_rs_dr_guara.pdf: 2269496 bytes, checksum: 15510607497762c601558887cb80984f (MD5)<br>Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)<br>A mobilização póstero-anterior consiste numa técnica de terapia manual que tem a finalidade de detectar alterações no padrão normal e na amplitude dos movimentos das articulações intervertebrais em pacientes com lombalgia. Mecanicamente, define-se como uma sobrecarga

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Stolworthy, Dean K. "Characterization and Biomechanical Analysis of the Human Lumbar Spine with In Vitro Testing Conditions." BYU ScholarsArchive, 2012. https://scholarsarchive.byu.edu/etd/2932.

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Biomechanical testing of cadaveric spinal segments forms the basis for our current understanding of healthy, pathological, and surgically treated spinal function. Over the past 40 years there has been a substantial amount of data published based on a spinal biomechanical testing regimen known as the flexibility method. This data has provided valuable clinical insights that have shaped our understanding of low back pain and its treatments. Virtually all previous lumbar spinal flexibility testing has been performed at room temperature, under very low motion rates, without the presence of a compr

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Duque, Luiz Heleno Moreira. "Modelo dinâmico da coluna lombar humana, com solicitação de esforço postero-anterior : análise com rigidez viscoelástica não linear /." Guaratinguetá : [s.n.], 2006. http://hdl.handle.net/11449/105363.

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Orientador: Tamotsu Hirata<br>Banca: José Elias Tomazini<br>Banca: Luiz Fernando Costa Nascimento<br>Resumo: Um modelo fundamentado nos sistemas multicorpos, com sete corpos rígidos e oito corpos flexíveis, com três graus de liberdade para cada um dos corpos rígidos está sendo proposto. Os corpos rígidos são providos de inércia e os corpos flexíveis trabalham como juntas e não são providos de inércia. A solução numérica do modelo foi obtida com o método Runge-Kutta. Os parâmetros de influência, curvatura inicial da espinha lombar, posições dos centros geométricos das vértebras, tórax e da sacr

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Duque, Luiz Heleno Moreira [UNESP]. "Modelo dinâmico da coluna lombar humana, com solicitação de esforço postero-anterior: análise com rigidez viscoelástica não linear." Universidade Estadual Paulista (UNESP), 2006. http://hdl.handle.net/11449/105363.

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Made available in DSpace on 2014-06-11T19:34:58Z (GMT). No. of bitstreams: 0 Previous issue date: 2006-04-24Bitstream added on 2014-06-13T19:04:57Z : No. of bitstreams: 1 duque_lhm_dr_guara.pdf: 1861000 bytes, checksum: 826224c8ed71ff732f9aa6af40eab143 (MD5)<br>Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)<br>Um modelo fundamentado nos sistemas multicorpos, com sete corpos rígidos e oito corpos flexíveis, com três graus de liberdade para cada um dos corpos rígidos está sendo proposto. Os corpos rígidos são providos de inércia e os corpos flexíveis trabalham como juntas

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Lin, Yu-An, and 林育安. "Effect of bearing properties on spindle stiffness." Thesis, 2016. http://ndltd.ncl.edu.tw/handle/76859291802898057825.

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碩士<br>國立中興大學<br>機械工程學系所<br>104<br>In the present machine tool industry, the calculation process of the bearing stiffness through a spindle''s dynamic state is still under development. Bearing stiffness is determined by the elastic deformation between bearing raceway surface and rolling element when bearing at force condition. The actual bearing stiffness can be known by inversing the natural frequency of the spindle through spindle dynamic experiment. Angular contact ball bearings are usually used in high-speed spindle. Bearing usually add preload to increase its stiffness. According the opera

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Chang, Yu-Che, and 張育哲. "Promotion of Spindle Stiffness for Machine-Tool." Thesis, 2014. http://ndltd.ncl.edu.tw/handle/46nvsr.

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碩士<br>國立虎尾科技大學<br>機械與電腦輔助工程系碩士班<br>102<br>As industries take off rapidly and the product demand amounts growing up continuously, most of the related parts and components in a product rely on machine-tool equipment to produce eagerly. In response to global competition, the machining and manufacturing should all be fast, effective and efficient, thus the needs of machine tools are augmented naturally day by day. A high-speed spindle system is the heart of a machine-tool and a high-quality machine-tool is always coupled with a spindle system that has high stiffness and better performance. Since h

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Chen, Kuang-Yu, and 陳光宇. "Spindle Stiffness Measurement with Non-Contact Excitation System." Thesis, 2016. http://ndltd.ncl.edu.tw/handle/45669770659854383378.

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碩士<br>國立中興大學<br>機械工程學系所<br>104<br>Machine tools are machines mainly for material removing based on cutting, drill-ing and grinding. Cutting precision and stability affect the manufacturing quality of a machine tool. Spindle is a key part of a machine tool. Machining precision, machining productivity and product quality are affected by spindle stiffness. Frequency response function (FRF) is selected to obtain spindle stiffness in this thesis. Excitation force and response are needed to obtain FRFs. Impact hammers, shakers and accelerometers are routinely used for obtaining FRFs. However, contac

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Zhao, JumSheng, and 趙金生. "Analysis of Static Stiffness and Natural Frequency of the Spindle System." Thesis, 2002. http://ndltd.ncl.edu.tw/handle/91250611601879357816.

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碩士<br>大葉大學<br>自動化工程研究所<br>90<br>A spindle of a machine tool must be designed to provide the required performance features. Some factors, such as bearing’s type, bearing span, bearing preload and level of tool holder’s pull-in force will affect the spindle’s static and dynamic characteristics. The complicated relationships between these factors are urgent topics to be studied. Bearing is one critical component of spindle. Several design parameters must be properly selected by the designer. It is evident that higher preload will provide higher stiffness. However, this will limit the

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Yu, Ben-Feng, and 游本豐. "Analysis of Ball-Bearing Stiffness and Cutting Stability of High Speed Spindle." Thesis, 2001. http://ndltd.ncl.edu.tw/handle/45017747826141965269.

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碩士<br>國立中正大學<br>機械系<br>89<br>The purpose of this work is to study the dynamic characteristics and cutting stability of a high-speed ball bearing spindle. It is known that the bearing stiffness becomes smaller at high speed due to the centrifugal force and gyroscope moment of the rotating elements of the bearings. Based on the model developed by Harris, we are able to analyze the dynamic characteristics of the ball bearings such as deformation, contact angle and stiffness under different preload conditions and rotating speed. Another objective of this work is to study the high spee

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Lin, Chi-Min, and 林啟民. "Simulations and Experiments of High-Speed Ball Bearing Stiffness and the Natural Frequency of Spindle-Bearing System." Thesis, 1999. http://ndltd.ncl.edu.tw/handle/71446041919592379930.

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碩士<br>國立成功大學<br>機械工程學系<br>87<br>This thesis studies the stiffness of angular contact ball bearing and the natural frequencies of spindle-bearing system under different rotational speeds, radial loads and axial loads. We first predict the friction torque and temperature rise of bearing, and calculate the thermal expansion of bearing elements in the condition of temperature rise, and then derive the bearing stiffness with considering the centrifugal forces of balls of bearing. After getting bearing stiffness, the natural frequencies of the spindle-bearing system can be obtained in different rota

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Chu, You-Sian, and 朱祐賢. "Investigation on the Relationship between the Interface Stiffness of Tool Holder and Machining Stability of a High Speed Spindle." Thesis, 2013. http://ndltd.ncl.edu.tw/handle/41165390411503611309.

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碩士<br>國立勤益科技大學<br>機械工程系<br>101<br>In this study, the finite element method was employed to predict the tool system and interface stiffness of tool holder system on the dynamic frequency response of high speed spindle. Since the interface characteristics of tool holder system tend to affect the spindle, therefore tool holder system is very important. In order to assess the influence of interface stiffness on the vibration characteristic of spindle unit, we first created a three dimensional finite element model of a high speed spindle system integrated with tool holder. The key point for the cre

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Lin, Sheng-Jie, and 林聖傑. "The Variation of Structural Stiffness of Tool Machine due to the Modification of the Structure of Machine Column and Spindle Head." Thesis, 2009. http://ndltd.ncl.edu.tw/handle/44207988938013361174.

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碩士<br>國立彰化師範大學<br>機電工程學系<br>97<br>The objective of this study is to apply finite element analysis to analyze the dynamics of the column and spindle head of Machine tool. The Pro/E is employed to construct the structure the Machine tool, including 3D assembly model. The problem is solved by the use of finite element method. The Pro/Mechanica is applied to obtain crucial designing parameters of dynamics. The variation of natural frequencies, mode shapes, stress distribution and structural rigidity of column and spindle head due to the change of their structures are studied. The result indicates

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Lai, Che-Yu, and 賴哲毓. "Non-contact stiffness measurement system for rotating spindles." Thesis, 2017. http://ndltd.ncl.edu.tw/handle/c8py7e.

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碩士<br>國立中興大學<br>機械工程學系所<br>106<br>Motorized spindle is explored in this paper. It uses front and rear bearings as supports. The motor rotor and stator are not in contact, so the dynamic performance of the spindle is mainly affected by the properties of bearing. The stiffness of bearing will change by the squeezing of the ball, the lubrication and deformation in rotating state. FRFs can be measured by using impact hammers and accelerometers. Non-rotating state of the bearing rigidity can be obtained by the analysis of frequency response function (FRF). However the typical impact test cannot be

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Brown, Stephen Hadley Morgan. "Examining the Neuromuscular and Mechanical Characteristics of the Abdominal Musculature and Connective Tissues: Implications for Stiffening the Lumbar Spine." Thesis, 2008. http://hdl.handle.net/10012/3623.

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Research has uncovered an essential role of proper abdominal muscle function in ensuring the health and integrity of the lumbar spine. The anatomical arrangement of the abdominal musculature (rectus abdominis, external oblique, internal oblique, transverse abdominis) and intervening connective tissues is unique in the human body. Despite the hypothesized importance and uniqueness of the abdominal muscles, very little research has been directed to understanding their role from a neuro-mechanical standpoint. Thus, this thesis was designed to study the neuro-activation and mechanical characterist

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Lee, Benjamin. "Trainability of Core Stiffness: Studies of Core Training Methods on Naive and Savvy Populations." Thesis, 2014. http://hdl.handle.net/10012/8206.

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Core exercise is a staple of many physical training regimens with goals ranging from improving athletic performance to rehabilitation of spine and knee injuries. Traditionally, dynamic movements such as flexion, lateral bending and twisting core exercise maneuvers are used in training programs; an approach consistent with training the distal limbs where muscular effort is mostly devoted to creating motion. However, knowledge of the functional anatomy of core musculature and spine injury mechanisms questions the use of these types of exercises. Alternative core exercises make use of isometric p

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Vaillant, Michele. "The effect of the duration and amplitude of spinal manipulation therapy on the spinal stiffness of a feline model." Master's thesis, 2010. http://hdl.handle.net/10048/1554.

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Introduction: The purpose of this study was to determine the effect of spinal manipulation therapy (SMT) duration and amplitude on spinal stiffness. Methods: Simulated SMTs were performed at the L6 spinous process in twenty-two felines. SMTs ranging from 25 to 250 ms duration were performed. Groups 1 and 2 received maximal displacements of 1.0mm to 3.0mm. Groups 3 and 4 received maximal loads of 25% to 85% body weight. Local stiffness was quantified by applying an indentation to the vertebra. Results: Repeated SMTs caused minimal changes in stiffness. The interaction effect of duration X dis

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"Biomechanical Evaluation of a Cervical Intervertebral Disc Degeneration Model." Doctoral diss., 2015. http://hdl.handle.net/2286/R.I.36462.

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abstract: Introduction. Intervertebral disc degeneration (DD) is one of the most common diagnoses in patients with neck pain and contributes to worldwide disability. Despite the advances in diagnostic imaging today, little is known about functional status of cervical DD. The purpose of this research was to 1) develop and validate an ovine model of cervical spine DD, 2) to quantify and compare the effect of disc lesions on dynamic spinal stiffness, and 3) study the effect of disc lesions on spinal accelerations and displacements during two types of spinal manipulative therapy (SMT). Method

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Hsiao, Chao-Min, and 蕭兆閔. "Effects of implant stiffness of the static transpedicular fixation on the lumbar spine." Thesis, 2009. http://ndltd.ncl.edu.tw/handle/14933287162454790079.

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碩士<br>國立中央大學<br>機械工程研究所<br>97<br>Generally,the marrow of intervertebral disk was begun degenerating by increasing age of human.This degenerating reduces the thickness of an intervertebral disk & hypertrophy of ligament & facet joint,so that it gives rise to stress the nerve and resulted in DDD. The solution for this kind of case is that we use the static fixation to recover the initial thickness of intervertebral disk by a surgical operation, so that we can solve the problem of degeneration of intervertebral disk. This research utilizes the "SolidWork" to construct the model of lumbar vertebra

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De, Carvalho Diana Elisa. "TIME VARYING GENDER AND PASSIVE TISSUE RESPONSES TO PROLONGED DRIVING." Thesis, 2008. http://hdl.handle.net/10012/3859.

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Background: Prolonged sitting in an automobile seat may alter the passive tissue stiffness of the lumbar spine differentially in males and females. Gender specific ergonomic interventions may be indicated for the automobile seat design. Purpose: To compare time-varying passive lumbar spine stiffness in response to a two hour simulated driving trial with time-varying lumbar spine and pelvic postures during sitting in an automobile seat. A secondary purpose was to investigate gender differences in lumbar spine stiffness, seat/occupant pressure profile, discomfort rating and posture. Methods

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Maswanganyi, Ishmael. "A study to determine the effectiveness of chiropractic spinal manipulative therapy and/or guided imagery in the treatment of chronic neck pain and stiffness." Thesis, 2010. http://hdl.handle.net/10210/3163.

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M. Tech.<br>Objective: This study was conducted in order to compare the effectiveness of Chiropractic spinal manipulative therapy (SMT) combined with guided imagery versus only guided imagery in the treatment of chronic neck pain and stiffness. Chiropractic SMT is aimed at treating neck pain as well as increasing the range of motion (ROM) of the neck. Guided imagery is aimed at reducing stress levels within the patient with a secondary effect of reducing tension in the neck muscles. This study therefore also has a secondary purpose to assess the effects of stress on chronic neck pain. It was h

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Drake, Janessa. "Axial twist loading of the spine: Modulators of injury mechanisms and the potential for pain generation." Thesis, 2008. http://hdl.handle.net/10012/3769.

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There are several reasons to research the effects of axial twist exposures and the resulting loading on the spine. The lack of consensus from the limited work that has previously examined the role of axial twist moments and motions in the development of spine injuries or generation of low back pain is the primary reason. From recently published works, axial twist moments appear to represent an increased risk for injury development when it acts in concert with loading about other physiological axes (i.e. flexion, extension, and compression). However, there is a large body of epidemiologic data

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Pagé, Isabelle. "Investigation des mécanismes qui sous-tendent les effets cliniques de la manipulation vertébrale dans la prise en charge des douleurs chroniques non spécifiques au rachis : rôle des réponses neuromécaniques et de la rigidité vertébrale." Thèse, 2018. http://depot-e.uqtr.ca/8752/1/032180796.pdf.

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