Search Results
Results 201 - 250 of 813
< 1 2 3 4 5 6 7 8 9 10 >
Sauer Julie L - - 2007
INTRODUCTION/PURPOSE: An understanding of normal pelvic motion during seated cycling is relevant to saddle design and bicycle fitting. In this study, we investigated the effects of gender, power, and hand position on pelvic motion throughout a pedal stroke. We also investigated whether anthropometric factors could explain any interindividual differences observed. ...
LeGrand Scott A - - 2007
BACKGROUND: Previous studies have characterized segmental craniocervical motion that occurs during direct laryngoscopy and intubation with a Macintosh laryngoscope blade. Comparable studies with the Miller blade have not been performed. The aim of this study was to compare maximal segmental craniocervical motion occurring during direct laryngoscopy and orotracheal intubation with ...
Na Ki-Ho - - 2007
A retrospective radiographic study. To verify the correlation of sagittal and coronal plane changes after selective thoracic fusion in main thoracic (MT) adolescent idiopathic scoliosis (AIS). Sagittal plane deformity is known to be essential in the evolution of scoliosis. Twenty-eight MT AIS patients treated by anterior selective thoracic fusion were ...
Battié Michele C - - 2008
Spinal range of motion is evaluated in assessing patients with back problems and monitoring outcomes, as well as in general fitness assessments. Yet, determinants of the substantial interindividual variation in spinal range of motion are not well understood. Substantial genetic effects on global measures of range of motion and hypermobility ...
Buttermann Glenn Robin - - 2009
BACKGROUND CONTEXT: The optimal animal model for in vivo testing of spinal implants, particularly total or partial disc replacement devices, has not yet been determined. Mechanical and morphological similarities of calf and human spines have been reported; however, limitations of the calf model include open growth plates and oversized vertebrae ...
Schmidt Hendrik - - 2008
BACKGROUND: The instantaneous center of rotation in a functional spinal unit is an indicator for mechanical disorders and is relevant for the development of motion preserving techniques. In addition to the intervertebral disc, the facet joints also play a major role for load transmission through the spine, providing stability to ...
Cheng Joseph S - - 2007
OBJECT: In this cervical spine kinematics study the authors evaluate the motions and forces in the normal, degenerative, and fused states to assess how alteration in the cervical motion segment affects adjacent segment degeneration and spondylosis. METHODS: Fluoroscopic images obtained in 30 individuals (10 in each group with disease at ...
Cattrysse E - - 2007
This study verifies the three-dimensional anatomical features of the transverse and alar ligaments with reference to the axis using a direct in vitro approach. In 20 fresh spine specimens, metal markers were inserted on the cranium, atlas, and axis. After registration of the intact specimen, the bony segments were separated, ...
Senouci M - - 2007
The vertebrae of the cervical spine exhibit out-of-plane or coupled motion during axial rotation and lateral bending. Quantifying the range of motion (ROM) of this occurrence can aid the understanding of cervical spine injury mechanisms and disorders, as well as the development of new treatment methods. Previous studies have formulated ...
Anderst William J - - 2008
BACKGROUND CONTEXT: Previous attempts to measure vertebral motion in vivo have been either static measure, imprecise, two-dimensional, or overly invasive to be applied to serial studies. PURPOSE: This study evaluated the efficacy of a unique high-speed biplane X-ray system for tracking lumbar vertebrae in vivo during dynamic motion. Additional goals ...
Guo Li-Xin - - 2008
This study attempts to determine the influence of anteroposterior (A-P) shifting of trunk mass from the upright sedentary posture on dynamic characteristics of the human lumbar spine. A three-dimensional finite element (FE) model comprising of the T12-Pelvis spine unit was used to mimic the human spine system. It is not ...
Pinto Rafael Z A - - 2008
Excessive foot pronation has been associated with the occurrence of low back pain, possibly for generating changes in the lumbopelvic alignment. However, the influence of foot pronation (measured as calcaneal eversion) on pelvic alignment during standing has not been well established. Fourteen young healthy subjects participated in the study. A ...
Gay Ralph E RE Department of Physical Medicine and Rehabilitation, Mayo Clinic, Rochester, MN 55905, USA. - - 2008
The quasistatic neutral zone is a surrogate for neutral region stiffness of spinal motion segments. No similar measure of dynamic stiffness has been validated. Because parameters related to stiffness are likely to be affected by loading rate and disc degeneration, we examined the effect of those factors on motion parameters ...
Zammit Maria - - 2008
Elasmosaurs were extremely long-necked, aquatic reptiles that used four flippers for locomotion. Their distinctive long neck distinguishes them from all other Mesozoic forms, yet the potential uses and constraints of this structure are poorly understood, particularly with regard to feeding. Several associated series of elasmosaurian cervical vertebrae were used to ...
Morais Sergi - - 2007
High-density competitive indirect microimmunoassays were performed in both sides of compact discs by direct absorption of immunoreagents on polycarbonate surface, using gold- or enzyme-labeled immunoglobulins as tracers for displaying the immunoreaction. The operational principle is based on the use of a low-reflectivity compact disc as analytical platform that allows the ...
Syed Faiz I - - 2007
STUDY DESIGN: System validation study. OBJECTIVE: To develop and validate a motion sensor system for measuring cervical spine motion over extended time periods. SUMMARY OF BACKGROUND DATA: Many studies using different methodologies have tried to estimate cervical spine motion. These have mostly been carried out in a laboratory setting performing ...
Milosavljevic Stephan - - 2008
Kinematic properties of trunk extension are considered sensitive differentiators of movement between asymptomatic and low back pain subjects. The aim of this study was to quantify the continuous interaction of the hip and lumbar spine kinematics and temporal characteristics as a function of direction during the task of trunk bending ...
Cattrysse E - - 2009
INTRODUCTION: The reproducibility of the 3-dimensional (3D) kinematic aspects of motion coupling patterns of segmental manual mobilizing techniques is not yet known. This study analyzes the segmental 3D aspects of manual mobilization of the atlanto-axial joint in vitro. METHODS AND MATERIALS: Twenty fresh human cervical specimens were studied in a ...
Nabhan Abdullah - - 2007
STUDY DESIGN: This is a prospective randomized and controlled study, approved by the local ethical committee of Saarland (Germany). OBJECTIVE: The aim of the current study was to analyze segmental motion following artificial disc replacement using disc prosthesis over 1 year. A second aim was to compare both segmental motion ...
Assink Nienke - - 2008
The objective of this study was to analyse cervical range of motion, assessed over time by means of a digital inclinometer (EDI-320) and a three-dimensional electromagnetic tracking device (Flock of Birds). The maximum active cervical range of motion was assessed with two measurement devices in three sessions over time, with ...
Bearden Brook G - - 2007
OBJECT: The purpose of this study was to compare manual maneuvering with the use of a Jackson table when moving patients with cervical spine instability from the supine to the surgically appropriate prone position. METHODS: The range of motion (ROM) of the cervical spine of a fresh cadaver was measured. ...
Gallagher Sean - - 2007
STUDY DESIGN: Survival analysis techniques were used to compare the fatigue failure responses of elderly motion segments to a middle-aged sample. OBJECTIVES: To compare fatigue life of a middle-aged sample of lumbosacral motion segments to a previously tested elderly cohort. An additional objective was to evaluate the influence of bone ...
Skrzat J - - 2007
This paper presents the case of an adult male skull with bilateral ossification of the stylohyoid complex. The total length of the stylohyoid complex amounts to 62 mm on the left side and 65 mm on the right side. Visual inspection of the stylohyoid revealed the presence of callosities that ...
Martin James C - - 2007
The purpose of this study was to develop and evaluate an alternative method for determining the position of the anterior superior iliac spine (ASIS) during cycling. The approach used in this study employed an instrumented spatial linkage (ISL) system to determine the position of the ASIS in the parasagittal plane. ...
Gloria Antonio - - 2007
Over the past years, a tremendous effort has been made to develop an intervertebral disc (IVD) prosthesis with suitable biological, mechanical and transport properties. However, it has been frequently reported that current prostheses undergo failure mainly due to the mismatch between the mechanical properties of the conventional device and the ...
Traynelis Vincent C - - 2007
This article describes the Prestige LP Artificial Cervical Disc, a new motion-sparing medical device designed for use in the cervical spine to treat symptomatic degenerative disc disease in patients who have failed conservative care. This technology allows for the maintenance of normal cervical spinal motion. As such, this motion-sparing technology ...
Przybyla Andrzej S - - 2007
STUDY DESIGN: Cadaveric motion segment experiment. OBJECTIVES: To compare the strength in bending and compression of the human cervical spine and to investigate which structures resist bending the most. SUMMARY OF BACKGROUND DATA: The strength of the cervical spine when subjected to physiologically reasonable complex loading is unknown, as is ...
Panjabi Manohar M - - 2007
Previous biomechanical models of cervical bilateral facet dislocation (BFD) are limited to quasi-static loading or manual ligament transection. The goal of the present study was to determine the facet joint kinematics during high-speed BFD. Dislocation was simulated using ten cervical functional spinal units with muscle force replication by frontal impact ...
Dellapé Pablo M - - 2007
The Berytidae or stilt bugs are a cosmopolitan family of lygaeoid bugs, which are slender, elongate insects, with generally cylindrical bodies and very long, slender antennae and legs. Members of the tribe Hoplinini are characterized by the lack of a distinct metapleural scent channel and the possession of a dorsally ...
Conrad Bryan P - - 2007
OBJECT: The purpose of the present study was to compare spinal motion generated during log-rolling and kinetic therapy with that generated when using a kinetic treatment table (KTT). The authors' hypothesis was that the KTT would produce less spinal motion while maintaining the benefits of body position changes. METHODS: Cervical ...
Turkstra Timothy P TP Department of Anesthesia and Perioperative Medicine, University of Western Ontario, Room C3-104, London Health Sciences Centre, London, Ontario, Canada. - - 2007
The optimal technique to manage the airway in patients presenting with a potential or documented cervical spine (C-spine) injury remains unresolved. Using fluoroscopic video assessment, C-spine motion during laryngoscopy with a Shikani Optical Stylet (SOS) was compared to C-spine motion during intubation using a Macintosh blade. Twenty-four healthy surgical patients ...
Yoganandan Narayan - - 2007
BACKGROUND: Aging, trauma, or degeneration can affect intervertebral kinematics. While in vivo studies can determine motions, moments are not easily quantified. Previous in vitro studies on the cervical spine have largely used specimens from older individuals with varying levels of degeneration and have shown that moment-rotation responses under lateral bending ...
Maduri A - - 2008
Spine motion has been described to have two regions, a neutral zone where lumbar rotation can occur with little resistance and an elastic zone where structures such as ligaments, facet joints and intervertebral disks resist rotation. In vivo, the passive musculature can contribute to further limiting the functional neutral range ...
Cattrysse E - - 2008
BACKGROUND: A restricted number of publications have reported on the analysis of coupling patterns in the atlanto-axial joint using an in vitro set-up applying pure moments of forces. The aim of this study is to analyze segmental motion coupling patterns during cervical manual mobilization. METHODS: The position and attitudes of ...
Teyhen Deydre S - - 2007
STUDY DESIGN: A prospective, case-control design. OBJECTIVES: To develop a kinematic model that characterizes frequently observed movement patterns in patients with low back pain (LBP). SUMMARY OF BACKGROUND DATA: Understanding arthrokinematics of lumbar motion in those with LBP may provide further understanding of this condition. METHODS: Digital fluoroscopic video (DFV) ...
Legaspi Owen - - 2007
STUDY DESIGN: Literature review. OBJECTIVES: To synthesize the current literature addressing coupled motion between side bending and rotation in the lumbar spine to determine if a consistent pattern exists across articles. BACKGROUND: [corrected] Low back pain is one of the most common conditions seen in outpatient physical therapy clinics. This ...
Seck Momar Talla - - 2007
The ultrastructural study of spermiogenesis and the spermatozoon of Paramphistomum microbothrium gave evidence of some characteristics of this digenean. The intercentriolar body located between two striated roots and two centrioles exhibits a symmetric plane. The two external bands of this intercentriolar body are made up of a line of granules. ...
Dehner Christoph - - 2007
BACKGROUND: The description of cervical spine motion and the risk to sustain a cervical spine injury is mainly based on cadaver studies. As the active influence of soft tissue is neglected in cadaver studies, our understanding of the kinematic model for whiplash is limited. Therefore the objective of this study ...
Petersen Cheryl M - - 2008
The purpose of this study was to determine the agreement between angular measures of cervical spinal motion obtained from radiographs and from measures recorded by the OSI CA 6000 Spine Motion Analyzer (OSI SMA) in asymptomatic subjects. Fourteen subjects performed each of the following motions two times while wearing the ...
Van Dillen Linda R - - 2007
OBJECTIVES: To examine whether lumbopelvic motion associated with a clinical test of active hip lateral rotation (HLR) systematically varied between people classified into 1 of 2 low back pain (LBP) subgroups: lumbar rotation (Rot) or lumbar rotation with extension (RotExt); and, specifically, to determine whether the timing of hip and ...
Auerbach Joshua D - - 2007
STUDY DESIGN: In vivo fluoroscopic analysis of lumbar spinal motion with total disc replacement (TDR), fusions, and controls. OBJECTIVES: Compare and contrast lumbar spinal motion profiles in TDR, circumferential fusion, and controls. SUMMARY OF BACKGROUND DATA: TDR has been shown to preserve motion and possibly prevent abnormal loading at the ...
Marsh Eric R - - 2007
This article describes an instrument to measure the error motion of rolling element bearings. This challenge is met by simultaneously satisfying four requirements. First, an axial preload must be applied to seat the rolling elements in the bearing races. Second, one of the races must spin under the influence of ...
Subramanian Navin - - 2007
STUDY DESIGN: Cadaveric study of a diagnostic test for cervical spine instability. OBJECTIVE: Determine if flexion-extension (FE) radiographs can be used to detect incremental damage to anterior cervical structures. SUMMARY OF BACKGROUND DATA: Prior studies have shown that damage to cervical structures can alter motion between vertebrae, and FE radiographs ...
Lafortune Pierre - - 2007
The basic mechanisms whereby mechanical factors modulate the metabolism of the growing spine remain poorly understood, especially the role of growth adaptation in spinal disorders like in adolescent idiopathic scoliosis (AIS). This paper presents a finite element model (FEM) that was developed to simulate early stages of scoliotic deformities progression ...
Piché Mathieu - - 2007
OBJECTIVE: The objective of this study was to develop a measurement method that could be implemented in chiropractic for the evaluation of angular and translational intervertebral motion of the cervical spine. METHODS: Flexion-extension radiographs were digitized with a scanner at a ratio of 1:1 and imported into a software, allowing ...
Schneider Adam M - - 2007
STUDY DESIGN: Biomechanical evaluation of cervical orthoses. OBJECTIVE: To provide data to help clinicians select an orthosis for immobilization of the adult cervical spine. SUMMARY OF BACKGROUND DATA: There are limited data on the effectiveness of cervical orthoses at restricting intervertebral motion, and many of the commonly used, contemporary braces ...
Zhu Qingan - - 2007
STUDY DESIGN: An in vitro biomechanical study to quantify 3-dimensional kinematics of the lumbar spine following facet arthroplasty. OBJECTIVES: To compare the multidirectional flexibility properties and helical axis of motion of the Total Facet Arthroplasty System (TFAS) (Archus Orthopedics, Redmond, WA) to the intact condition and to posterior pedicle screw ...
Troke Michael - - 2007
The study purposes were to investigate the level of agreement of palpation of lumbar spinous processes between examiners, test-retest repeatability of lumbar spine range of motion, and the reliability of upright position measures in asymptomatic subjects. The modified CA 6000 spinal motion apparatus with a new skin fixation system was ...
Silfies Sheri P - - 2007
Impaired proprioception in the lumbar spine has often been reported in people with low back pain. However, no prospective studies exist to assert the cause and effect of this association. We hypothesized that athletes with a history of low back injury (LBI) would demonstrate poorer lumbar position sense (PS) than ...
Cattrysse E - - 2007
BACKGROUND: Three-dimensional kinematic aspects of coupled motion during manual cervical mobilization have not previously been studied. Using an in vitro 3D-motion analysis method, the kinematic effects of two different segmental techniques for axial rotation and lateral bending mobilization of the upper cervical spine were investigated as a second part of ...
< 1 2 3 4 5 6 7 8 9 10 >