2 edition of Spinal modelling to investigate postural loading and stability found in the catalog.
Spinal modelling to investigate postural loading and stability
Susannah Louise Grilli
Written in English
Thesis (Ph.D.) - Loughborough University, 1997.
|Statement||by Susannah Louise Grilli.|
The goal of this study was to investigate if a follower load can be produced by the back muscles for enhancing the mechanical stability of the lumbar spine in a quiet standing posture. Model. A biomechanical model was implemented to compute the effects of muscle fatigue on spinal stability. Briefly, a three-dimensional (3-D), two segment model of the spine was developed that included 12 muscle equivalents (Figure 1).The two-segment geometry is unique, allowing independent control of trunk flexion and lumbar lordosis as well as requiring stabilizing support against both.
The neutral position of the spine is the posture most commonly sustained throughout daily activities. Previous investigations of the spine focused mainly on maximal exertions in various symmetric and asymmetric postures. This report proposes a new synergetic approach for analysis of the spine in neu . Posture is one of the most important factors in spinal stability. To investigate the spinal instability, a tool was developed using the Thrustline theory. spine model to be employed in.
A biomechanical model predicted that task and handle stability can influence torso muscle co-contraction and associated spinal load. Empirical measurements confirmed that trunk muscle activity in the IO and EO muscle groups was greater when pushing against an unstable interface than when pushing against a rigid interface. Thoracic mobility has become a buzzword over the last several years. This is likely due to the constant barrage of messages dealing with functional movement and mobility versus stability, along with the increased popularity of many movement-based therapies, such as corrective exercise and yoga.. While many buzzwords come and go, thoracic mobility is something that is, hopefully, here to stay.
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The curvature of the whole spine, a distributed loading pattern for body weight, and the activity of individual spinal muscle groups have been considered.
Comparison with the previous arch model has shown these to be necessary features for determining the loading and stability associated with a given : Susannah Louise Grilli. Spinal modelling to investigate postural loading and stability.
(Thesis) Grilli SL. Publisher: Loughborough University of Technology  Metadata Source: The British Library Type: Thesis.
Abstract. No abstract supplied. Menu. Formats. Abstract. EThOS. About. About Europe PMC; Funders; Joining Europe PMC Author: Susannah Louise Grilli. The proposed model also allowed for the incorporation of realistic nonlinear and direction-dependent load-displacement behavior of spinal motion segments, satisfaction of equilibrium at deformed configurations, as well as subsequent verification of the stability of the posture at any given by: Figure Flow-chart for the application of the Kinematics-based approach to predict trunk muscle forces, spinal loads, and stability (critical lever arms for thoracic muscles can be defined as a function of their initial values in upright posture; anatomy of muscles used in the model is depicted in Figureconvergence is attained if.
Aggahyan, R.V. and Pal’tsev, Y.I. () Reproduction of certain special aspects of the dynamics of the maintanance of the vertical posture by man using a mathematical model. Biofizika, –Cited by: This work aimed to evaluate trunk muscle forces, internal loads and stability margin under some simulated standing postures, with and without external loads, using a nonlinear finite element model of the T1–S1 spine with realistic nonlinear load-displacement properties.
A novel kinematics-based algorithm was applied that exploited a set of spinal sagittal rotations, initially calculated to. Background/aim: To investigate the effects of an 8-week thoracic stabilization exercise program on back pain, spinal alignment, postural sway, and core endurance in university students.
Therefore a new model, The Conceptual Compressive Lumbar Load Distribution Model (CCLLDM) (Figure 1) is presented. This model provides evidence based parameters to describe the ‘envelope of motion’ 11 and establishes an optimum spinal posture, determined by axial compressive load.
The foremost authorities from chiropractics, orthopaedics and physical therapy present a practical overview of spinal rehabilitation. This clinical resource presents the most current and significant spinal rehab information, showing how to apply simple and inexpensive rehabilitation in the office.
The updated Second Edition includes clinical/regional protocols and chapters on diagnostic triage /5(2). Core stability exercises are considered key components of training programs (19).Core stability is based on three subsystems: the passive spinal column, active spinal muscles and a neural control.
The physiologic range of motion (ROM) includes a neutral zone (NZ) and an elastic zone (EZ).The NZ is the initial part of the intervertebral motion on either side of the neutral position where it meets relatively low resistance and the spine exhibits high flexibility owing to the laxity status of capsules, ligaments and tendons ().The NZ is followed by the EZ where the resistance to movement.
In another instance, Francis Denis 3 proposed the “three-column” model. The spine has three load-bearing columns on the sagittal plane, anterior, middle, and posterior columns.
The anterior column consists of the anterior longitudinal ligament, anterior two thirds of vertebral body, and anterior two thirds of annulus fibrosis or disk. Cholewicki and McGill developed a comprehensive mathematical model to estimate the mechanical stability of the human lumbar spine in vivo, taking into account the external load on the body and the EMG signals of various muscles.
The model consisted of five rigid vertebrate, the rib cage, pelvis and 90 muscle fascicles. Postural Stability and Spine Loading Noma Agbonifo Presented by Kermit Davis Low Back Biomechanics and Workplace Stress Laboratory University of Cincinnati. Challenges of Inclined Manual Material Handling • Set of lifts to calibrate EMG-assisted spine load model.
Apparatus. With each load increment the specimens Crisco et al.: Eular stability of spine: Experiment 29 were initially positioned in the upright posture and released.
The load step was maintained for 30 s-1 before the vertebral displacements were recorded and the load increased. The unconstrained spine was most flexible in the sagittal plane (least stiff plane). The existence of combined moments and pelvic rotation significantly increased the load-bearing capacity of the spine so that the free standing passive thoracolumbar spine resisted the axial compression forces of more than N with minimal displacements.
The musculoskeletal model. The model consisted of five lumbar vertebrae in a plane (Figure (Figure2), 2), and between the vertebrae it included five centers of rotation (CoR), representing the joints of the intervertebral discs, each with one degree of freedom torsional degrees of freedom are irrelevant in the light of spinal curvatures (lordosis and scoliosis), the model.
Model accuracy, reflecting the ability of the model to capture the dynamics of seated balance, was correlated with seated balance performance (r=, pmodeling, only the best five balancers’ data were used for hypothesis testing.
The task chosen for this investigation was unstable seated balancing, which isolates trunk muscle control in postural stability. Because of the inherently unstable dynamics, this system requires feedback control to maintain stable behavior, and as such provides a useful model for evaluating delays in feedback control loops.
The linear model, with a higher initial stiffness, predicted a higher buckling load (67 N), and hence was more stable in upright posture than the exponential model (11 N). After buckling, the. The aim of this study was to investigate how the forces required to stabilize the lumbar spine in the standing posture may be affected by variation in its shape.
A two-dimensional model of the lumbar spine in the sagittal plane was developed that included a .Structural Spinal and Postural RehabilitationWe provide adjustment and over 50 forms of spinal Traction Book an Appointment ADJUSTMENTAdjusting the spine toward a normal position is an integral part of your Total Health Spine and Nutrition experience.
CBP® adjustments work with an emphasis on Postural Displacements to improve nervous system function. These adjustments utilize mirror-image. Introduction The harmful effects of sustained sitting and the health of the spine are well documented.
The focus of much of this investigation has been sedentary occupations. However, how people sit during leisure hours can impact on the health of the spine both in and out of working hours. Methods A literature search was conducted using Amed, Cinahl and OVID Medline databases.