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Forward dynamic modelling of cycling for people with spinal cord injurySinclair, Peter James. January 2001 (has links)
Thesis (Ph. D.)--University of Sydney, 2002. / Title from title screen (viewed Apr. 23, 2008). Submitted in fulfilment of the requirements for the degree of Doctor of Philosophy to the School of Exercise and Sport Science, Faculty of Health Sciences. Degree awarded 2002; thesis submitted 2001. Includes bibliography. Also available in print form.
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The research and design of spinal orthosis to create a back brace for post operative patientsHicks, Michael Ryan, Britnell, Richard E., January 2009 (has links)
Thesis--Auburn University, 2009. / Abstract. Vita. Includes bibliographical references (p. 116-119).
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RNA Backbone Rotamers and ChiropraxisMurray, Laura Weston, January 2007 (has links)
Thesis (Ph. D.)--Duke University, 2007. / Includes bibliographical references.
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The origin of the vertebral column in the deer-mouse, Peromyscus maniculatus rufinusSensenig, Edgar Carl, January 1900 (has links)
Condensation of Thesis (Ph. D.)--University of Michigan, 1941. / Caption title. "Reprinted from the Anatomical record, vol. 86, no. 2, June, 1943." "Literature cited": p. 136-137.
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Growth of the corticospinal tract and the development of placing reactions in the postnatal ratDonatelle, Janet Marie, January 1900 (has links)
Thesis (Ph. D.)--University of Wisconsin--Madison, 1976. / Typescript. Vita. eContent provider-neutral record in process. Description based on print version record. Includes bibliographical references.
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Differential functioning of deep and superficial lumbar multifidus fibres during vertebral indentation perturbationsApperley, Scott 11 1900 (has links)
Introduction: Lumbar spine stability programs have been advocated to prevent and
rehabilitate low back injury. Specifically, abdominal ‘drawing in’ has been used to train
motor control deficits in individuals with low back pain. This technique requires
differential activity within deep and superficial lumbar multifidus fibres, yet the ability of
these fibres to act differentially has not been extensively examined. Deep fibres are
hypothesized to act as spinal stabilizers while superficial fibres are hypothesized to act as
global movers of the trunk.
Objective: To investigate differential excitation of deep and superficial lumbar multifidus
fibres during segmental indentation loads to the lumbar spine.
Methods: Posterior-anterior indentation loads were applied to individual lumbar spinous
processes of prone participants at three different velocities and three different indentation
displacements. Indentations consisted of an initial downward displacement that was
subsequently held for 500 milliseconds. Intramuscular electromyography (EMG) of deep
and superficial lumbar multifidus fibres at L3, L4 and L5 was recorded. EMG was
quantified by “average” root mean square (RMS), peak RMS of a sliding RMS window
and time-to-peak RMS over the indentation phase and 500 millisecond hold phase.
Results: Increased indentation displacement at the slowest velocity resulted in increased
“average” RMS of only the L5 superficial multifidus fibres. Increased indentation
velocity produced differential effects in deep and superficial multifidus fibres. “Average”
RMS and peak RIVIS significantly increased with increasing indentation velocity in most
deep fibre recording sites, yet superficial fibre excitation did not significantly increase. In
most EMG recording sites, the time-to-peak RMS increased with increasing indentation
displacement and decreased with increasing indentation velocity.
Conclusion: Differential excitation of superficial and deep multifidus fibres was found
with increasing indentation velocity; however, the result was opposite to that
hypothesized. This result is clinically relevant because it suggests deep multifidus fibre
excitation may increase in response to increased perturbation magnitude, possibly to
restore vertebral body position. Differential excitation effects may also be related to
different mechanical stimuli experienced by deep and superficial fibres due to vertebral
body movement during indentation loads.
11 / Education, Faculty of / Kinesiology, School of / Graduate
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The mechanical properties of the human lumbar spine /Tencer, Allan. January 1981 (has links)
No description available.
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Development of an experimental method to identify structural properties of the intervertebral joint after spine staple implantation under simulated physiologic loadsCoombs, Matthew T. January 2011 (has links)
No description available.
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Effects of Seated Whole-Body Vibration on Spinal Stability ControlSlota, Gregory P. 09 December 2008 (has links)
Low back disorders and their prevention is of great importance for companies and their employees. Whole-body vibration is a risk factor for low back disorders, but the neuromuscular, biomechanical, and/or physiological mechanisms responsible for this increased risk are unclear. These studies investigated changes in the biomechanics and control of the trunk in order to further the understanding of the mechanisms responsible for this increased risk.
The purpose of the first study was to measure the acute effect of seated whole-body vibration on the postural control of the trunk during unstable seated balance. The findings show that whole-body vibration impaired the postural control of the trunk as evidenced by increased kinematic variance and non-linear stability control measures during unstable sitting. These findings imply an impairment in spinal stability control.
The purpose of the second study was to measure the effect of seated whole-body vibration on the parameters of spinal stability control: passive stiffness, active stiffness, and neuromuscular reflexes. The findings show that whole-body vibration altered trunk stiffness (passive stiffness and equivalent reflex stiffness) as well as reflex dynamics. There was no evidence of compensation by active muscle co-contraction recruitment for the decreased trunk stiffness and reflex gain.
The purpose of the third study was to measure the changes in the natural frequency characteristics of the trunk (which can be related to trunk stiffness and damping) during exposure to seated whole-body vibration. The findings show that whole-body vibration caused a decrease in natural frequency suggesting a decrease in the trunk stiffness, and also an increase in the peak amplitude of the frequency response functions suggesting a decrease in overall trunk damping. The rate of change of the natural frequency characteristics suggest that the majority of effects happen within the first 10 minutes of vibration exposure.
These findings reveal changes in the biomechanical properties of the trunk with exposure to seated whole body vibration, and a mechanism by which vibration may increase the risk of low back injury. / Ph. D.
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Chiropractors' inter- and intra-examiner reliability of cervical spine radiographic analysis and its impact on clinical managementMarais, Carla January 2011 (has links)
Dissertation submitted in partial compliance with the requirements for the
Master’s Degree in Technology: Chiropractic, Durban University of Technology, 2011. / BACKGROUND:
Plain film radiography is the most common imaging technique requested by chiropractors to assist in the management of patients with musculoskeletal complaints. There is a paucity literature indicating that chiropractors’ interpretive radiographic skills are consistently able to achieve the same outcome given a particular set of radiographs. An important indication for the use of radiography in chiropractic is to exclude any possible contraindications to spinal manipulative therapy (SMT) that could cause serious injury to a patient if it is left unmodified or excluded as a treatment option.
OBJECTIVES:
The study aimed to investigate the inter- and intra-examiner reliability of chiropractor’s diagnosis on cervical spine radiographs. Additionally, the effect of clinical history added to the radiographs was assessed.
METHODS:
Inter- and intra-examiner evaluations occurred on two consecutive readings of 30 radiographs by six qualified chiropractors. No clinical history was given during Round One, but was available during Round Two.
RESULTS:
The inter-observer agreement for categorisation and management went from “poor agreement” in Round One (Κ=0.1962 and Κ=0.1996 respectively) to “fair agreement” (Κ= 0.2041 and Κ=0.2036 respectively) beyond that expected by chance in Round Two. Identification remained “fair agreement” beyond that expected by chance over both rounds (Κ=0.3113 and Κ=0.2159). Sensitivity at Round One was 94.4% and the specificity was 61.1%. At Round Two the sensitivity had decreased to 93.8% and the specificity had decreased to 50%. There was no significant difference between the accuracy of the Round One and Round Two results for categorisation (p=0.243) and management (p=0.220), but there was a clinical difference for identification (p=0.014).
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CONCLUSION:
Differences in the result were small indicating clinical relevance with regards to inter-examiner reliability was fair in most instances. Although clinical history did not influence categorisation or management, it did improve accuracy of identification of pathology. Chiropractors successfully identified between 93.8% and 94.4% of abnormal radiographic findings demonstrating that chiropractors use of radiographs as a diagnostic tool when looking for contraindications to spinal manipulative therapy was sensitive. This demonstrates that its use as a diagnostic tool for contraindications to spinal manipulative therapy (SMT) is sensitive.
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