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Cervical axial rotation

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https://www.readbyqxmd.com/read/29909211/stereotactic-selective-thalamotomy-for-focal-dystonia-with-aid-of-depth-microrecording
#1
Masafumi Hirato, Takaaki Miyagishima, Akio Takahashi, Yuhei Yoshimoto
OBJECTIVE: Long-term effectiveness of selective ventralis intermedius (VIM)-ventralis oralis (VO) thalamotomy with depth microrecording for the treatment of focal dystonia was evaluated. The optimal thalamic areas for controlling focal dystonia were studied based on the electrophysiological and anatomical data. METHODS: Stereotactic selective VIM-VO thalamotomy with depth microrecording was carried out in 8 patients with focal arm and hand dystonia and in one patient with cervical dystonia...
June 14, 2018: World Neurosurgery
https://www.readbyqxmd.com/read/29907675/high-reproducibility-of-an-automated-measurement-of-mobility-for-patients-with-axial-spondyloarthritis
#2
Juan L Garrido-Castro, Rafael Curbelo, Ramón Mazzucchelli, María E Domínguez-González, Cristina Gonzalez-Navas, Bryan J Flores Robles, Pedro Zarco, Juan Mulero, Luis Cea-Calvo, María J Arteaga, Pilar Font-Ugalde, Loreto Carmona, Eduardo Collantes-Estevez
OBJECTIVE: Conventional measures of spinal mobility used in the assessment of patients with axial spondyloarthritis (axSpA), such as the Bath Ankylosing Spondylitis Metrology Index and its components, are subject to interobserver variability. The University of Córdoba Ankylosing Spondylitis Metrology Index (UCOASMI) is a validated composite index based on a motion video-capture system, UCOTrack. Our objective was to assess its reproducibility in clinical practice settings. METHODS: We carried out an observational study of repeated measures in 3 centers...
June 15, 2018: Journal of Rheumatology
https://www.readbyqxmd.com/read/29905581/torticollis-caused-by-nontraumatic-craniovertebral-junction-abnormalities
#3
Sunghoon Park, Ji-Eun Woo, Sanghyun Kim, Shin-Young Yim
Torticollis could be the only symptom and sign of craniovertebral junction (CVJ) abnormality. It could be difficult to identify CVJ abnormality as a cause of torticollis due to their rarity, especially for the subjects with torticollis caused by nontraumatic CVJ abnormalities. There has been no report to focus on nontraumatic CVJ abnormalities as a cause of torticollis. The objective of this study was to report 27 patients of torticollis caused by nontraumatic CVJ abnormalities, with the aim of helping clinicians to identify nontraumatic CVJ abnormalities as a cause of torticollis...
June 13, 2018: Journal of Craniofacial Surgery
https://www.readbyqxmd.com/read/29897505/comprehensive-drilling-of-c1-2-facets-and-multiplanar-realignment-for-atlanto-axial-dislocation-and-basilar-invagination-2-dimensional-operative-video
#4
Pravin Salunke, Sushanta K Sahoo
The management for congenital atlantoaxial dislocation (AAD) and basilar invagination (BI) has significantly changed in the last 2 decades. Authors operate these cases through a direct posterior approach by opening and manipulating the C1-2 joints (irrespective of C1 assimilation), modifying Goel's technique. The joints in these cases are often oblique in both sagittal and coronal planes giving rise to anteroposterior and vertical slip of C1 on C2. Asymmetry on either side gives rise to coronal/lateral angular tilt along with rotational component...
June 12, 2018: Operative Neurosurgery (Hagerstown, Md.)
https://www.readbyqxmd.com/read/29881231/biomechanical-comparison-of-a-novel-c1-posterior-u-construct-with-four-other-techniques-in-a-c1-c2-fixation-model
#5
Joshua P Herzog, Nicholas J Zarkadis, Gautham Prabhakar, Nicholas A Kusnezov
Background: Compare the biomechanical stability of a novel "U" posterior cervical fixation construct to four other posterior cervical atlantoaxial fixation constructs. Methods: Eight fresh frozen human cadaver spines were tested after a simulated odontoid fracture, and following stabilization with each construct. Results: All constructs significantly decreased flexion-extension and axial rotation compared to the destabilized spine...
June 2018: Journal of Orthopaedics
https://www.readbyqxmd.com/read/29852313/the-rib-cage-stiffens-the-thoracic-spine-in-a-cadaveric-model-with-body-weight-load-under-dynamic-moments
#6
Erin M Mannen, Elizabeth A Friis, Hadley L Sis, Benjamin M Wong, Eileen S Cadel, Dennis E Anderson
The thoracic spine presents a challenge for biomechanical testing. With more segments than the lumbar and cervical regions and the integration with the rib cage, experimental approaches to evaluate the mechanical behavior of cadaveric thoracic spines have varied widely. Some researchers are now including the rib cage intact during testing, and some are incorporating follower load techniques in the thoracic spine. Both of these approaches aim to more closely model physiological conditions. To date, no studies have examined the impact of the rib cage on thoracic spine motion and stiffness in conjunction with follower loads...
May 16, 2018: Journal of the Mechanical Behavior of Biomedical Materials
https://www.readbyqxmd.com/read/29804415/-analysis-of-a-three-dimensional-finite-element-model-of-atlas-and-axis-complex-fracture
#7
X M Tang, C Liu, K Huang, G T Zhu, H L Sun, J Dai, J W Tian
Objective: To explored the clinical application of the three-dimensional finite element model of atlantoaxial complex fracture. Methods: A three-dimensional finite element model of cervical spine (FEM/intact) was established by software of Abaqus6.12.On the basis of this model, a three-dimensional finite element model of four types of atlantoaxial complex fracture was established: C(1) fracture (Jefferson)+ C(2) fracture (type Ⅱfracture), Jefferson+ C(2) fracture(type Ⅲfracture), Jefferson+ C(2) fracture(Hangman), Jefferson+ stable C(2) fracture (FEM/fracture)...
May 22, 2018: Zhonghua Yi Xue za Zhi [Chinese medical journal]
https://www.readbyqxmd.com/read/29669689/3-dimensional-cervical-movement-characteristics-and-the-influence-of-thoracic-treatment-on-a-subgroup-of-acute-neck-pain-patients
#8
Nikolas L Krott, Gunnar M Bloyinski, Erik Cattrysse
OBJECTIVE: The purpose of this study was to investigate the influence of thoracic high-velocity low-amplitude thrust (HVLAT) manipulation on quantitative and qualitative 3-dimensional cervical spine kinematic patterns in a subgroup of patients with acute neck pain. METHODS: Thirty patients with acute neck pain, aged 20 to 59, received a thoracic HVLAT manipulation. Three-dimensional kinematics of the cervical spine were registered pretreatment and posttreatment using an electromagnetic tracking system...
May 2018: Journal of Manipulative and Physiological Therapeutics
https://www.readbyqxmd.com/read/29627641/occiput-axis-crossing-translaminar-screw-fixation-technique-using-offset-connectors-an-in-vitro-biomechanical-study
#9
Jiyong Gu, Weiwei Lei, Zong Xin, Yi Wu, Lin Peng, Zhibin Li, Zize Feng, Minchan Zhao, Songtao Qi, Yuntao Lu
OBJECTIVE: Fixation with the axis vertebra (C2) using pedicle screws is commonly used to treat an unstable occipitocervical junction; however, it is accompanied by a risk of vertebral artery injury. The occiput-C2 (OC2) crossing translaminar screw fixation technique may avoid this risk, but rod implantation is difficult. Offset connectors can help facilitate this construct. This study aimed to evaluate the stability of a technique for OC2 crossing translaminar screw fixation using offset connectors (C2LAM + OF) in comparison with other methods...
June 2018: Clinical Neurology and Neurosurgery
https://www.readbyqxmd.com/read/29574342/three-dimensional-kinematics-of-the-cervical-spine-using-an-electromagnetic-tracking-device-differences-between-healthy-subjects-and-subjects-with-non-specific-neck-pain-and-the-effect-of-age
#10
G P G Lemmers, M W M Heijmans, A Scafoglieri, R Buyl, J B Staal, M A Schmitt, E Cattrysse
BACKGROUND: A cross-sectional observational study of three-dimensional cervical kinematics in 35 non-specific neck pain patients and 100 asymptomatic controls. To compare qualitative and quantitative aspects of cervical kinematics between healthy subjects and subjects with non-specific neck pain and to determine the effect of age on cervical kinematics in healthy subjects. METHODS: Three-dimensional kinematics of active lateral bending and flexion-extension of 35 patients and 100 controls were registered by means of an electromagnetic tracking system...
May 2018: Clinical Biomechanics
https://www.readbyqxmd.com/read/29533041/-biomechanical-study-of-the-stability-of-subaxial-cervical-anterior-transpedicular-screw-fixation-for-three-column-injury
#11
Hai-Hao Wu, Tao Tang, Qing-Jiang Pang, Xin-Hua Yuan, Chun-Guang Zhou
OBJECTIVE: To compare the stability of subaxial cervical anterior transpedicular screw(ATPS) fixation and three traditional fixations for three-column injury. METHODS: Six specimens of cervical spine were prepared. After measurememt of the range of motion(ROM) in intact state, the specimens were made into three-column injury models. The models were reconstructed with an anterior cervical cage, and stabilized by ATPS, anterior plate(AP), anterior plate + lateral mass screw(AP+LMS) and posterior transpedicular screw(PTPS)...
January 25, 2018: Zhongguo Gu Shang, China Journal of Orthopaedics and Traumatology
https://www.readbyqxmd.com/read/29455101/does-pedicle-screw-fixation-of-the-subaxial-cervical-spine-provide-adequate-stabilization-in-a-multilevel-vertebral-body-fracture-model-an-in-vitro-biomechanical-study
#12
John Duff, Mir M Hussain, Noelle Klocke, Jonathan A Harris, Soumya S Yandamuri, Lukas Bobinski, Roy T Daniel, Brandon S Bucklen
BACKGROUND: Cervical vertebral body fractures generally are treated through an anterior-posterior approach. Cervical pedicle screws offer an alternative to circumferential fixation. This biomechanical study quantifies whether cervical pedicle screws alone can restore the stability of a three-column vertebral body fracture, making standard 360° reconstruction unnecessary. METHODS: Range of motion (2.0 Nm) in flexion-extension, lateral bending, and axial rotation was tested on 10 cadaveric specimens (five/group) at C2-T1 with a spine kinematics simulator...
March 2018: Clinical Biomechanics
https://www.readbyqxmd.com/read/29454150/assessment-of-cervical-stiffness-in-axial-rotation-among-chronic-neck-pain-patients-a-trial-in-the-framework-of-a-non-manipulative-osteopathic-management
#13
P-M Dugailly, A Coucke, W Salem, V Feipel
BACKGROUND: Cervical stiffness is a clinical feature commonly appraised during the functional examination of cervical spine. Measurements of cervical stiffness in axial rotation have not been reported for patients with neck pain. The purpose of this study was to investigate cervical spine stiffness in axial rotation among neck pain patients and asymptomatic subjects, and to analyze the impact of osteopathic management. METHODS: Thirty-five individuals (17 patients) were enrolled...
March 2018: Clinical Biomechanics
https://www.readbyqxmd.com/read/29451436/novel-posterior-artificial-atlanto-odontoid-joint-for-atlantoaxial-instability-a-biomechanical-study
#14
Kai Shen, Zhongliang Deng, Junsong Yang, Chao Liu, Ranxi Zhang
OBJECTIVE Atlantoaxial instability is usually corrected by anterior and/or posterior C1-2 fusion. However, fusion can lead to considerable loss of movement at the C1-2 level, which can adversely impact a patient's quality of life. In this study, the authors investigated the stability and function of a novel posterior artificial atlanto-odontoid joint (NPAAJ) by using cadaveric cervical spines. METHODS The Oc-C7 regions from 10 cadaveric spines were used for anteroposterior (AP) translation and range of motion (ROM) tests while intact and after destabilization, NPAAJ implantation, and double-rod fixation...
May 2018: Journal of Neurosurgery. Spine
https://www.readbyqxmd.com/read/29421491/development-of-a-finite-element-model-of-the-ligamentous-cervical-vertebral-column-of-a-great-dane
#15
Marília de Albuquerque Bonelli, Anoli Shah, Vijay Goel, Fabiano Séllos Costa, Ronaldo Casimiro da Costa
Cervical spondylomyelopathy (CSM), also known as wobbler syndrome, affects mainly large and giant-breed dogs, causing compression of the cervical spinal cord and/or nerve roots. Structural and dynamic components seem to play a role in the development of CSM; however, pathogenesis is not yet fully understood. Finite element models have been used for years in human medicine to study the dynamic behavior of structures, but it has been mostly overlooked in veterinary studies. To our knowledge, no specific ligamentous spine models have been developed to investigate naturally occurring canine myelopathies and possible surgical treatments...
January 29, 2018: Research in Veterinary Science
https://www.readbyqxmd.com/read/29414758/morphometric-changes-of-the-cervical-intervertebral-foramen-a-comparative-analysis-of-pre-manipulative-positioning-and-physiological-axial-rotation
#16
Pierre-Michel Dugailly, Benoît Beyer, Walid Salem, Véronique Feipel
BACKGROUND: Cervical foraminal impingement has been described as a source of radicular pain. Clinical tests and head motions have been reported for affecting the intervertebral foramen (IVF) dimensions. Although manual approaches are proposed in the management of cervical radiculopathy, their influence on the foraminal dimensions remains unclear. OBJECTIVES: To investigate the influence of pre-manipulative positioning versus cervical axial rotation on the foraminal dimensions of the lower cervical spine...
April 2018: Musculoskeletal Science & Practice
https://www.readbyqxmd.com/read/29322984/a-device-for-three-dimensional-quantitative-assessment-and-alignment-of-c1-2-vertebrae-during-posterior-distraction-and-fusion-technique-for-atlantoaxial-dislocation-and-or-basilar-invagination
#17
P B Karthik, Jayesh Sardhara, Nachiketa Tiwari, Sanjay Behari
The most common type of congenital C1-2 dislocation is a combined type in which atlanto-axial dislocation (AAD) and basilar invagination (BI) are often associated with a rotational dislocation and coronal tilt. An optimal surgical treatment involves reduction of AAD and BI with simultaneous correction of the rotation and coronal tilt to achieve an optimal cervical canal decompression, sagittal and coronal realignment and bony fusion. The most acceptable technique to facilitate this correction is the C1-C2 distraction technique, which is accomplished by the manual joint manipulation...
January 2018: Neurology India
https://www.readbyqxmd.com/read/29310670/the-comparison-of-clinical-outcome-of-fresh-type-ii-odontoid-fracture-treatment-between-anterior-cannulated-screws-fixation-and-posterior-instrumentation-of-c1-2-without-fusion-a-retrospective-cohort-study
#18
Suomao Yuan, Bin Wei, Yonghao Tian, Jun Yan, Wanlong Xu, Lianlei Wang, Xinyu Liu
BACKGROUND: Recently, the excellent outcomes of temporary fixation of C1-2 without fusion in the treatment of odontoid fracture had been reported. It is still unclear if this technique could achieve the equivalent outcomes as the golden standard technique of anterior screw fixation. The objective of this study is to compare the clinical outcome of two treatments of fresh type II odontoid fracture: anterior cannulated screws fixation (ACSF) versus posterior instrumentation of C1-2 without fusion (PIWF)...
January 8, 2018: Journal of Orthopaedic Surgery and Research
https://www.readbyqxmd.com/read/29279998/modified-anterior-only-reduction-and-fixation-for-traumatic-cervical-facet-dislocation-ao-type-c-injuries
#19
Rishi M Kanna, Ajoy P Shetty, S Rajasekaran
PURPOSE: Surgical reduction of uni and bi-facetal dislocations of the cervical spine (AO type C injuries) can be performed by posterior, anterior or combined approaches. Ease of access, low infection rates and less risks of neurological worsening has popularized anterior approach. However, the reduction of locked cervical facets can be intricate through anterior approach. We analyzed the safety, efficacy and outcomes at a minimum 1 year, of a novel anterior reduction technique for consecutively treated cervical facet dislocations...
December 26, 2017: European Spine Journal
https://www.readbyqxmd.com/read/29202506/effect-of-facetectomy-on-the-three-dimensional-biomechanical-properties-of-the-fourth-canine-cervical-functional-spinal-unit-a-cadaveric-study
#20
Nadja Bösch, Martin Hofstetter, Alexander Bürki, Beatriz Vidondo, Fenella Davies, Franck Forterre
Objective  To study the biomechanical effect of facetectomy in 10 large breed dogs (>24 kg body weight) on the fourth canine cervical functional spinal unit. Methods  Canine cervical spines were freed from all muscles. Spines were mounted on a six-degrees-of-freedom spine testing machine for three-dimensional motion analysis. Data were recorded with an optoelectronic motion analysis system. The range of motion was determined in all three primary motions as well as range of motion of coupled motions on the intact specimen, after unilateral and after bilateral facetectomy...
November 2017: Veterinary and Comparative Orthopaedics and Traumatology: V.C.O.T
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