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Cervical spine biomechanics

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https://www.readbyqxmd.com/read/28731832/effects-of-cervical-high-velocity-low-amplitude-techniques-on-range-of-motion-strength-performance-and-cardiovascular-outcomes-a-review
#1
Xabier Galindez-Ibarbengoetxea, Igor Setuain, Lars L Andersen, Robinson Ramírez-Velez, Miriam González-Izal, Andoni Jauregi, Mikel Izquierdo
BACKGROUND: Cervical high-velocity low-amplitude (HVLA) manipulation technique is among the oldest and most frequently used chiropractic manual therapy, but the physiologic and biomechanics effects were not completely clear. OBJECTIVE: This review aims to describe the effects of cervical HVLA manipulation techniques on range of motion, strength, and cardiovascular performance. METHODS/DESIGN: A systematic search was conducted of the electronic databases from January 2000 to August 2016: PubMed (n = 131), ScienceDirect (n = 101), Scopus (n = 991), PEDro (n = 33), CINAHL (n = 884), and SciELO (n = 5)...
July 21, 2017: Journal of Alternative and Complementary Medicine: Research on Paradigm, Practice, and Policy
https://www.readbyqxmd.com/read/28714657/women-with-late-whiplash-syndrome-have-greatly-reduced-load-bearing-of-the-cervical-spine-in-vivo-biomechanical-cross-sectional-lateral-radiographic-study
#2
Eythor Kristjansson, Magnus K Gislason
BACKGROUND: No study has been conducted to ascertain whether the load-bearing capacity of the cervical spine is reduced in vivo in late whiplash syndrome (LWS). AIM: To compare the segmental cervical angular values across C0-C6, between two conditions: without versus with external axial load upon the head in three groups of women. DESIGN: A single-blind, age-Body Mass Index (BMI) matched, radiographic, cross-sectional study. SETTING: Radiographic Department at a University Hospital...
July 17, 2017: European Journal of Physical and Rehabilitation Medicine
https://www.readbyqxmd.com/read/28713084/evalution-of-the-effectiveness-of-multimodal-approach-to-the-management-of-cervical-vertigo
#3
Olexandr A Jaroshevskyi, Oleksandr S Payenok, Anna V Logvinenko
INTRODUCTION: Vertigo is one of the most common complaints among patients consulting neurologists and general practitioners - family medicine. A special form of dizziness is cervical vertigo. However, the presence of chronic vertigo and imbalance in this group of patients makes it possible to include the treatment of vestibular rehabilitation in the program. AIM: Evalution of the effectiveness of multimodal approach to the management of cervical vertigo. MATERIAL AND METHODS: 109 patients aged from 18 to 45 with vertigo together with myofascial pain syndrome of neck and shoulder area were examined...
2017: Wiadomości Lekarskie: Organ Polskiego Towarzystwa Lekarskiego
https://www.readbyqxmd.com/read/28713050/the-biomechanical-impact-of-the-facet-tropism-on-the-intervertebral-disc-and-facet-joints-in-the-cervical-spine
#4
Xin Rong, Beiyu Wang, Chen Ding, Yuxiao Deng, Hua Chen, Yang Meng, Weijie Yan, Hao Liu
BACKGROUND CONTEXT: The facet tropism is defined as the angular difference between the left and right facet orientation. The facet tropism was suggested to be associated with the disc degeneration and facet degeneration in the lumbar spine. However, little is known about the relationship between the facet tropism and pathological changes in the cervical spine and the mechanism behind. PURPOSE: This study was conducted to investigate the biomechanical impact of the facet tropism on the intervertebral disc and facet joints...
July 13, 2017: Spine Journal: Official Journal of the North American Spine Society
https://www.readbyqxmd.com/read/28678112/prosthesis-and-hybrid-strategy-consideration-for-treating-2-level-cervical-disc-degeneration-in-hybrid-surgery
#5
Yang Li, Guy R Fogel, Zhenhua Liao, Rajnesh Tyagi, Weiqiang Liu
STUDY DESIGN: Biomechanical analysis using a validated nonlinear finite element (FE) model. OBJECTIVE: To combine the strategy of two-level hybrid surgery (HS) to explore how prostheses affect cervical biomechanics. SUMMARY OF BACKGROUND DATA: Few FE studies have explored differences in biomechanical behavior between combined and stand-alone structured prostheses with HS. No FE studies have considered whether the prosthesis type and hybrid strategy influence two-level HS...
July 3, 2017: Spine
https://www.readbyqxmd.com/read/28673824/incorporating-ligament-laxity-in-a-finite-element-model-for-the-upper-cervical-spine
#6
Timothy L Lasswell, Duane S Cronin, John B Medley, Parham Rasoulinejad
BACKGROUND CONTEXT: Predicting physiological range of motion (ROM) using a finite element (FE) model of the upper cervical spine requires the incorporation of ligament laxity. The effect of ligament laxity can only be observed on a macro level of joint motion and is lost once ligaments have been dissected and preconditioned for experimental testing. As a result, although ligament laxity values are recognized to exist, specific values are not directly available in the literature for use in FE models...
June 30, 2017: Spine Journal: Official Journal of the North American Spine Society
https://www.readbyqxmd.com/read/28660796/increased-stress-and-strain-on-the-spinal-cord-due-to-ossification-of-the-posterior-longitudinal-ligament-in-the-cervical-spine-under-flexion-after-laminectomy
#7
Batbayar Khuyagbaatar, Kyungsoo Kim, Won Man Park, SuKyoung Lee, Yoon Hyuk Kim
Myelopathy in the cervical spine due to cervical ossification of the posterior longitudinal ligament could be induced by static compression and/or dynamic factors. It has been suggested that dynamic factors need to be considered when planning and performing the decompression surgery on patients with the ossification of the posterior longitudinal ligament. A finite element model of the C2-C7 cervical spine in the neutral position was developed and used to generate flexion and extension of the cervical spine...
June 1, 2017: Proceedings of the Institution of Mechanical Engineers. Part H, Journal of Engineering in Medicine
https://www.readbyqxmd.com/read/28660372/a-finite-element-study-of-traditional-chinese-cervical-manipulation
#8
Zhen Deng, Kuan Wang, Huihao Wang, Tianying Lan, Hongsheng Zhan, Wenxin Niu
PURPOSE: Traditional Chinese cervical manipulation (TCCM) has been claimed as an effective treatment for diseases of the cervical spine, but its biomechanical effects on the vertebral body and intervertebral discs remain unclear. The aim of this study was to develop and validate a detailed finite element model of cervical spine, which was then used to investigate the biomechanical response of the cervical spine to TCCM. METHODS: The model of a C2-T1 cervical spine was constructed based on CT images of a healthy male volunteer and validated against published in vitro studies under different loading conditions...
June 28, 2017: European Spine Journal
https://www.readbyqxmd.com/read/28597366/finite-element-model-predicts-the-biomechanical-performance-of-cervical-disc-replacement-and-fusion-hybrid-surgery-with-various-geometry-of-ball-and-socket-artificial-disc
#9
Yang Li, Guy R Fogel, Zhenhua Liao, Weiqiang Liu
PURPOSE: Few finite element studies have investigated changes in cervical biomechanics with various prosthesis design parameters using hybrid surgery (HS), and none have investigated those combined different HS strategies. The aim of our study was to investigate the effect of ball-and-socket prosthesis geometry on the biomechanical performance of the cervical spine combined with two HS constructs. METHODS: Two HS strategies were conducted: (1) ACDF at C4-C5 and anterior cervical disc replacement (ACDR) at C5-C6 (ACDF/ACDR), and (2) ACDR/ACDF...
June 8, 2017: International Journal of Computer Assisted Radiology and Surgery
https://www.readbyqxmd.com/read/28591075/comparison-of-the-vacuum-mattress-versus-the-spine-board-alone-for-immobilization-of-the-cervical-spine-injured-patient-a-biomechanical-cadaveric-study
#10
Mark L Prasarn, Per Kristian Hyldmo, Laura A Zdziarski, Evan Loewy, Dewayne Dubose, MaryBeth Horodyski, Glenn R Rechtine
STUDY DESIGN: Biomechanical cadaveric study. SUMMARY OF BACKGROUND DATA: Trauma patients in the United States are immobilized on a rigid spine board, whereas in many other places vacuum mattresses are used with the proposed advantages of improved comfort and better immobilization of the spine. OBJECTIVE: We sought to determine the amount of motion generated in an unstable cervical spine fracture with use of the vacuum mattress versus the spine board alone...
June 6, 2017: Spine
https://www.readbyqxmd.com/read/28582418/an-in-vivo-comparison-study-in-goats-for-a-novel-motion-preserving-cervical-joint-system
#11
Jie Qin, Chenguang Zhao, Dong Wang, Bo Zhao, Jun Dong, Haopeng Li, Rongxia Sang, Shuang Wang, Jiao Fu, Rangrang Kong, Xijing He
Cervical degenerative disease is one of the most common spinal disorders worldwide, especially in older people. Anterior cervical corpectomy and fusion (ACCF) is a useful method for the surgical treatment of multi-level cervical degenerative disease. Anterior cervical disc replacement (ACDR) is considered as an alternative surgical method. However, both methods have drawbacks, particularly the neck motion decrease observed after arthrodesis, and arthroplasty should only be performed on patients presenting with cervical disc disease but without any vertebral body disease...
2017: PloS One
https://www.readbyqxmd.com/read/28580053/persistent-proatlas-with-additional-segmentation-of-the-craniovertebral-junction-the-tsuang-goehmann-malformation
#12
Holger Spittank, Ulrich Goehmann, Hendrik Hage, Robby Sacher
Case study description and analysis of a complex craniovertebral dysplasia in an 8-year-old male patient, in which conventional cervical spine radiographs demonstrated a regularly differentiated occipital base, as well as the presence of two lateral masses of the proatlas vertebra and two lateral masses of the atlas vertebra. Further assessment included computed tomography of the occipital base and the upper cervical spine as well as three-dimensional reconstruction. Malsegmentation of the fourth occipital vertebra can result in various anomalies that are known as 'manifestation of the proatlas'...
October 2016: Journal of Radiology Case Reports
https://www.readbyqxmd.com/read/28570783/on-the-importance-of-retaining-stresses-and-strains-in-repositioning-computational-biomechanical-models-of-the-cervical-spine
#13
Solomon Boakye-Yiadom, Duane S Cronin
Human body models are created in a specific posture and often repositioned and analyzed without retaining stresses that result from repositioning. For example, repositioning a human neck model within the physiological range of motion to a head-turned posture prior to an impact results in initial stresses within the tissues distracted from their neutral position. The aim of this study was to investigate the effect of repositioning on the subsequent kinetics, kinematics and failure modes of a lower cervical spine motion segment, to support future research at the full neck level...
June 1, 2017: International Journal for Numerical Methods in Biomedical Engineering
https://www.readbyqxmd.com/read/28535435/multi-segmental-thoracic-spine-kinematics-measured-dynamically-in-the-young-and-elderly-during-flexion
#14
Dominika Ignasiak, Andrea Rüeger, Stephen J Ferguson
In contrast to the cervical and lumbar region, the normal kinematics of the thoracic spine have not been thoroughly investigated. The aim of this study was to characterize normal multi-segmental continuous motion of the whole thoracolumbar spine, during a flexion maneuver, in young and elderly subjects. Forty-two healthy volunteers were analyzed: 21 young (age=27.00±3.96) and 21 elderly (age=70.1±3.85). Spinal motion was recorded with a motion-capture system and analyzed using a 3rd order polynomial function to approximate spinal curvature throughout the motion sequence...
May 20, 2017: Human Movement Science
https://www.readbyqxmd.com/read/28532919/image-guided-lateral-mass-osteotomy-for-en-bloc-resection-of-cervical-ewing-sarcoma-a-technical-note
#15
Jia Xi Julian Li, Kevin Phan, Tommy Manh Tran, Ralph J Mobbs, Ralph Stanford
BACKGROUND: En bloc resection of Ewing sarcoma in the cervical spine according to Enneking's principles is technically challenging owing to the proximity of important neurovascular structures, the complex local anatomy, and the biomechanical instability of radical resection. The rarity of Ewing sarcoma and variability of its presentation justifies ongoing exploration and compilation of the surgical nuances and subtleties of en bloc resection in the cervical spine. CASE DESCRIPTION: We present a 34-year-old male with Ewing sarcoma of the neck who underwent successful en bloc resection using a novel technique of splitting the laminae and osteomizing the lateral masses under imaging guidance...
August 2017: World Neurosurgery
https://www.readbyqxmd.com/read/28525481/comparison-of-the-clinical-and-radiographic-results-between-cervical-artificial-disk-replacement-and-anterior-cervical-fusion-a-6-year-prospective-nonrandomized-comparative-study
#16
Wei Tian, Kai Yan, Xiao Han, Jie Yu, Peihao Jin, Xiaoguang Han
STUDY DESIGN: Prospective nonrandomized comparative study. OBJECTIVE: To compare the long-term clinical and radiographic results of cervical artificial disk replacement (CADR) and anterior cervical discectomy and fusion (ACDF), and to provide our evidence if CADR could reduce adjacent segment degeneration (ASD). SUMMARY OF BACKGROUND DATA: CADR is widely used in spine surgery today. Despite the short-term results of it having been ascertained, the long-term results are still under observation...
June 2017: Clinical Spine Surgery
https://www.readbyqxmd.com/read/28498072/paravertebral-foramen-screw-fixation-for-posterior-cervical-spine-fusion-biomechanical-study-and-description-of-a-novel-technique
#17
Satoshi Maki, Masaaki Aramomi, Yusuke Matsuura, Takeo Furuya, Mitsutoshi Ota, Yasushi Iijima, Junya Saito, Takane Suzuki, Chikato Mannoji, Kazuhisa Takahashi, Masashi Yamazaki, Masao Koda
OBJECTIVE Fusion surgery with instrumentation is a widely accepted treatment for cervical spine pathologies. The authors propose a novel technique for subaxial cervical fusion surgery using paravertebral foramen screws (PVFS). The authors consider that PVFS have equal or greater biomechanical strength than lateral mass screws (LMS). The authors' goals of this study were to conduct a biomechanical study of PVFS, to investigate the suitability of PVFS as salvage fixation for failed LMS, and to describe this novel technique...
May 12, 2017: Journal of Neurosurgery. Spine
https://www.readbyqxmd.com/read/28456670/there-is-no-increased-risk-of-adjacent-segment-disease-at-the-cervico-thoracic-junction-following-an-anterior-cervical-discectomy-and-fusion-to-c7
#18
Philip K Louie, Steven M Presciutti, Stephanie E Iantorno, Daniel D Bohl, Kevin Shah, Grant D Shifflett, Howard S An
BACKGROUND: Anterior cervical discectomy and fusion (ACDF) is a very common operative intervention for the treatment of cervical spine degenerative disease in those who have failed non-operative measures. However, studies examining long-term follow up on patients who underwent ACDF reveal evidence of radiographic and clinical degenerative disc disease at the levels adjacent to the fusion construct. Consistent with other junctional regions of the spine, the cervicothoracic junction (CTJ) has significant morphological variations...
April 26, 2017: Spine Journal: Official Journal of the North American Spine Society
https://www.readbyqxmd.com/read/28444241/cervical-spine-muscle-tendon-unit-length-differences-between-neutral-and-forward-head-postures-biomechanical-study-using-human-cadaveric-specimens
#19
Saeed Khayatzadeh, Olivia A Kalmanson, Dale Schuit, Robert M Havey, Leonard I Voronov, Alexander J Ghanayem, Avinash G Patwardhan
Background: Forward Head Posture (FHP) may be associated with neck pain and poor health-related quality of life. Literature describes only qualitative muscle length changes associated with FHP. Objective: To quantify how muscle-tendon unit lengths are altered when human cadaveric specimens are placed in alignments representing different severities of FHP. Design: Biomechanical study using 13 fresh-frozen cadaveric cervical spine specimens (Occiput-T1, 54±15yrs)...
April 21, 2017: Physical Therapy
https://www.readbyqxmd.com/read/28427722/biomechanical-investigation-of-post-operative-c5-palsy-due-to-ossification-of-the-posterior-longitudinal-ligament-in-different-types-of-cervical-spinal-alignment
#20
Batbayar Khuyagbaatar, Kyungsoo Kim, Won Man Park, Yoon Hyuk Kim
Post-operative C5palsies are among the most common complications seen after cervical surgery for ossification of the posterior longitudinal ligament (OPLL). Although C5 palsy is a well-known complication of cervical spine surgery, its pathogenesis is poorly understood and depends on many other factors. In this study, a finite element model of the cervical spine and spinal cord-nerve roots complex structures was developed. The changes in stress in the cord and nerve roots, posterior shift of the spinal cord, and displacement and elongation of the nerve roots after laminectomy for cervical OPLL were analyzed for three different cervical sagittal alignments (lordosis, straight, and kyphosis)...
April 5, 2017: Journal of Biomechanics
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