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https://www.readbyqxmd.com/read/28078473/traumatic-atlantoaxial-rotatory-fixation-in-an-adult-patient
#1
María A García-Pallero, Cristina V Torres, Juan Delgado-Fernández, R G Sola
INTRODUCTION: Atlantoaxial rotational fixation (AARF) is a rare entity in adults, with only a few cases reported in the English literature and often associated with a traumatic mechanism. It is an underdiagnosed condition that must be taken into account in the initial assessment of all craniocervical trauma. Both diagnostic and therapeutic delay may be a potential cause of severe neurological damage or even death of the patient. The therapeutic management is controversial given the difficulty of achieving optimum stability and permanent reduction...
January 11, 2017: European Spine Journal
https://www.readbyqxmd.com/read/28072744/posterior-arthrodesis-of-c1-c3-for-the-stabilization-of-multiple-unstable-upper-cervical-fractures-with-spinal-cord-compromise-a-case-report-and-literature-review
#2
Deting Xue, Qixin Chen, Gang Chen, Wenhai Zhuo, Fangcai Li
BACKGROUND: Multiple fractures of the atlas and axis are rare. The management of multiple fragment axis fractures and unstable atlas fractures is still challenging for the spinal surgeon. There are no published reports of similar fractures with 3-part fracture of axis associated with an unstable atlas fracture. CASE SUMMARY: We present a patient with concurrent axis and atlas fractures, which have not been reported. The patient suffered hyperextension injury with neck pain and numbness of the bilateral upper extremity associated with weakness after a 2-m fall...
January 2017: Medicine (Baltimore)
https://www.readbyqxmd.com/read/28068962/correlation-between-lumbar-dysfunction-and-fat-infiltration-in-lumbar-multifidus-muscles-in-patients-with-low-back-pain
#3
Markus Hildebrandt, Gabriela Fankhauser, André Meichtry, Hannu Luomajoki
BACKGROUND: Lumbar multifidus muscles (LMM) are important for spinal motion and stability. Low back pain (LBP) is often associated with fat infiltration in LMM. An increasing fat infiltration of LMM may lead to lumbar dysfunction. The purpose of this study was to investigate whether there is a correlation between the severity of lumbar dysfunction and the severity of fat infiltration of LMM. METHODS: In a cross-sectional study, 42 patients with acute or chronic LBP were recruited...
January 10, 2017: BMC Musculoskeletal Disorders
https://www.readbyqxmd.com/read/28068232/analysis-of-the-factors-contributing-to-vertebral-compression-fractures-after-spine-stereotactic-radiosurgery
#4
David Boyce-Fappiano, Erinma Elibe, Lonni Schultz, Samuel Ryu, M Salim Siddiqui, Indrin Chetty, Ian Lee, Jack Rock, Benjamin Movsas, Farzan Siddiqui
PURPOSE: To determine our institutional vertebral compression fracture (VCF) rate after spine stereotactic radiosurgery (SRS) and determine contributory factors. METHODS AND MATERIALS: Retrospective analysis from 2001 to 2013 at a single institution was performed. With institutional review board approval, electronic medical records of 1905 vertebral bodies from 791 patients who were treated with SRS for the management of primary or metastatic spinal lesions were reviewed...
February 1, 2017: International Journal of Radiation Oncology, Biology, Physics
https://www.readbyqxmd.com/read/28060839/sensory-feedback-in-interlimb-coordination-contralateral-afferent-contribution-to-the-short-latency-crossed-response-during-human-walking
#5
Sabata Gervasio, Michael Voigt, Uwe G Kersting, Dario Farina, Thomas Sinkjær, Natalie Mrachacz-Kersting
A constant coordination between the left and right leg is required to maintain stability during human locomotion, especially in a variable environment. The neural mechanisms underlying this interlimb coordination are not yet known. In animals, interneurons located within the spinal cord allow direct communication between the two sides without the need for the involvement of higher centers. These may also exist in humans since sensory feedback elicited by tibial nerve stimulation on one side (ipsilateral) can affect the muscles activation in the opposite side (contralateral), provoking short-latency crossed responses (SLCRs)...
2017: PloS One
https://www.readbyqxmd.com/read/28057095/-comparison-of-curative-effect-and-prognosis-analysis-of-patients-with-spinal-metastases-treated-by-percutaneous-vertebroplasty-combined-with-postoperative-radiotherapy-and-radiotherapy-alone
#6
X Y Cao, Y S Liu, M X Lei, S B Liu, S G Zhou, Y C Cao, W G Jiang
Objective: To evaluate the efficacy of percutaneous vertebroplasty(PVP) combined with postoperative radiotherapy and radiotherapy alone in the treatment of spinal metastatic tumors and to evaluate the prognostic factors for survival. Methods: From December 2011 to December 2015, according to the choice of treatment, patients in group A(60 cases) were treated with PVP combined with postoperative radiotherapy and those in group B(50 cases) underwent radiotherapy alone, age, sex, primary tumor type , and other basic characteristics were analyzed in both groups in department of orthopedics and radiotherapy department, 307 Hospital of the People's Liberation Army...
December 20, 2016: Zhonghua Yi Xue za Zhi [Chinese medical journal]
https://www.readbyqxmd.com/read/28055084/forward-head-posture-and-activation-of-rectus-capitis-posterior-muscles
#7
Richard C Hallgren, Steven J Pierce, Dhruv B Sharma, Jacob J Rowan
CONTEXT: Rectus capitis posterior (RCP) muscles have physical attachments to the pain-sensitive spinal dura. Atrophy of these muscles is associated with chronic headache in some patients. The authors suspect that the significance of atrophy in the RCP muscles has been undervalued because the functional role of these muscles is not well defined. OBJECTIVE: To determine whether a statistically significant change in normalized levels of electromyographic activity in RCP muscles occurs when the head is voluntarily moved from a self-selected neutral head position to a protruded head position...
January 1, 2017: Journal of the American Osteopathic Association
https://www.readbyqxmd.com/read/28050455/outcomes-of-short-segment-posterior-instrumentation-in-unstable-thoracolumbar-fractures
#8
Sharvil H Gajjar, Hari J Menon, Nitin Chaudhari, Vipul Chaudhari
INTRODUCTION: The spinal traumas are common and leading problem in orthopaedics practice. The individuals are at a risk of high energy trauma in modern era. Unstable thoracolumbar burst fractures are serious injuries of concern, if left untreated may result in marked morbidity and disability to the patient. Thoracolumbar is the second most common segment involved in the spinal cord following spinal injuries followed by cervical segment. The goal of treatment of any spinal injury is restoration of the patient to maximum possible function with disability free life...
November 2016: Journal of Clinical and Diagnostic Research: JCDR
https://www.readbyqxmd.com/read/28045852/overview-on-criteria-for-mep-monitoring
#9
David B MacDonald
Intraoperative motor evoked potentials include the D-wave as a surrogate for long-term motor outcome and muscle motor evoked potentials as a surrogate for early outcome. Their efficacy depends on excluding confounding factors and on warning criteria; insufficiently sensitive criteria could result in unpredicted deficits, whereas excessively sensitive ones could cause false alarms deterring surgical treatment and jading surgeons to alerts, eventually leading to deficits through failure to intervene. Although D-waves have few indications, they are nonsynaptic, linear, and stable-properties that support amplitude reduction criteria: >50% for intramedullary spinal cord tumor surgery and >30% to 40% for peri-Rolandic brain surgery...
January 2017: Journal of Clinical Neurophysiology: Official Publication of the American Electroencephalographic Society
https://www.readbyqxmd.com/read/28043848/surgical-treatment-of-degenerative-spondylolisthesis
#10
REVIEW
P Guigui, E Ferrero
Degenerative spondylolisthesis is a common pathology, often causing lumbar canal stenosis. There is, however, no strong consensus regarding the various medical and surgical treatments available. Surgery is indicated mainly for perceived functional impairment; when the indication is accepted, several questions determine the choice of surgical strategy. Improvement in neurological symptoms is one of the main treatment objectives. For this, it is useful to perform radicular decompression. Some authors recommend indirect decompression by interbody fusion (ALIF, TLIF, XLIF), others by means of an interspinous spacer but the most frequent technique is direct posterior decompression...
December 30, 2016: Orthopaedics & Traumatology, Surgery & Research: OTSR
https://www.readbyqxmd.com/read/28041330/quality-of-life-after-different-surgical-procedures-for-the-treatment-of-spinal-metastases-results-of-a-single-center-prospective-case-series
#11
Godard C W de Ruiter, Claudine O Nogarede, Jasper F C Wolfs, Mark P Arts
OBJECTIVE The performance of surgery for spinal metastases is rapidly increasing. Different surgical procedures, ranging from stabilization alone to stabilization combined with corpectomy, are thereby performed for various indications. Little is known about the impact of these different procedures on patient quality of life (QOL), but this factor is crucial when discussing the various therapeutic options with patients and their families. Thus, the authors of this study investigated the effect of various surgical procedures for spinal metastases on patient QOL...
January 2017: Neurosurgical Focus
https://www.readbyqxmd.com/read/28041324/frequency-of-symptomatic-vertebral-body-compression-fractures-requiring-intervention-following-single-fraction-stereotactic-radiosurgery-for-spinal-metastases
#12
Michael S Virk, James E Han, Anne S Reiner, Lily A McLaughlin, Daniel M Sciubba, Eric Lis, Yoshiya Yamada, Mark Bilsky, Ilya Laufer
OBJECTIVE The purpose of this study was to determine the rate of symptomatic vertebral body compression fractures (VCFs) requiring kyphoplasty or surgery in patients treated with 24-Gy single-fraction stereotactic radiosurgery (SRS). METHODS This retrospective analysis included all patients who had been treated with 24-Gy, single-fraction, image-guided intensity-modulated radiation therapy for histologically confirmed solid tumor metastases over an 8-year period (2005-2013) at Memorial Sloan Kettering Cancer Center...
January 2017: Neurosurgical Focus
https://www.readbyqxmd.com/read/28038690/the-development-of-a-representative-porcine-early-onset-scoliosis-model-with-a-standalone-posterior-spinal-tether
#13
R Bogie, A K Roth, P C Willems, Vd W Weegen, J J Arts, L W van Rhijn
STUDY DESIGN: In vivo analysis in a porcine model. OBJECTIVES: To develop a porcine experimental scoliosis model representative of early-onset scoliosis (EOS) with the use of a radiopaque ultra-high molecular weight polyethylene (UHMWPE) posterior spinal tether. SUMMARY OF BACKGROUND DATA: Large animal experimental scoliosis models with substantial growth potential are needed to test new fusionless scoliosis correction techniques. Previously described scoliosis models involve rib procedures, which violate the thoracic cage and affect subsequent corrective procedures...
January 2017: Spine Deformity
https://www.readbyqxmd.com/read/28038688/biomechanical-evaluation-of-a-growth-friendly-rod-construct
#14
Sarah Galvis, Josh Arnold, Erin Mannen, Benjamin Wong, Hadley Sis, Eileen Cadel, John Anderson, Dennis Anderson, Paul Arnold, Elizabeth Friis
BACKGROUND: Distraction-type rods mechanically stabilize the thorax and improve lung growth and function by applying distraction forces at the rib, spine, pelvis, or a combination of locations. However, the amount of stability the rods provide and the amount the thorax needs is unknown. METHODS: Five freshly frozen and thawed cadaveric thoracic spine specimens were tested for lateral bending, flexion/extension, and axial rotation in displacement control (1°/sec) to a load limit of ±5 Nm for five cycles after which a growth-friendly unilateral rod was placed in a simulated rib-to-lumbar attachment along the right side...
January 2017: Spine Deformity
https://www.readbyqxmd.com/read/28033285/migration-of-titanium-cable-into-spinal-cord-and-spontaneous-c2-and-c3-fusion-case-report-of-possible-causes-of-fatigue-failure-after-posterior-atlantoaxial-fixation
#15
Huibo Li, Jigang Lou, Hao Liu
INTRODUCTION: Atlantoaxial instability is a common and serious injury of the upper cervical spine. Brooks' procedure is widely used to reconstruct the unstable atlantoaxial joint. The migration into spinal cord of titanium cable and spontaneous fusion between C2 and C3 has been little reported and the management of such a patient is difficult. We describe an unusual case of fatigue failure of posterior titanium atlantoaxial cable fixation with migration into the spinal cord and spontaneous fusion between C2 and C3...
December 2016: Medicine (Baltimore)
https://www.readbyqxmd.com/read/28033151/spinal-realignment-for-adult-deformity-three-column-osteotomies-alter-total-hip-acetabular-component-positioning
#16
Jeffrey J Barry, Altug Yucekul, Alexander A Theologis, Erik N Hansen, Christopher Ames, Vedat Deviren
INTRODUCTION: A goal of adult spinal deformity surgery is correction of sagittal imbalance by increasing lumbar lordosis (LL), allowing a previously retroverted pelvis to normalize as evidenced by decreases in pelvic tilt (PT). Realignment of pelvic orientation may alter the position of preexisting total hip arthroplasties (THAs). METHODS: Twenty-seven patients with unilateral THA who underwent thoracolumbar fusions for adult spinal deformity from the pelvis to L1 or above were retrospectively reviewed (levels fused, 10...
December 28, 2016: Journal of the American Academy of Orthopaedic Surgeons
https://www.readbyqxmd.com/read/28032293/spatiotemporal-patterns-of-ring1-expression-after-rat-spinal-cord-injury
#17
Hanzhang Liu, Wei Ji, Peipei Gong, Chun Liu, Chengwei Duan, Yilu Gao, Xiaojuan Liu, Dongmei Zhang, Shunxing Zhu, Leilei Gong
Ring finger protein 1 (RING1) is a RING domain characterized protein belonging to the RING finger family. It is an E3 ubiquitin-protein ligase that mediated monoubiquitination of histone H2A and the core component of PRC1 complex, which is the repressive multiprotein complex of Polycomb group (PcG). Previous studies showed the important tumorigenic role of RING1 via promoting cell proliferation and the crucial function in maintaining transcriptional program stability during development. However, its mechanism for spinal cord injury (SCI) is still unknown...
December 28, 2016: Neurochemical Research
https://www.readbyqxmd.com/read/28028650/occult-subaxial-cervical-disco-ligamentous-injuries-in-computer-tomography-negative-trauma-patients
#18
Jiun-Lih Lin, Sumant Samuel, Randolph Gray, Stephen Ruff, Con Vasili, Andrew Cree, Nathan Hartin
PURPOSE: Due to lack of cervical clearance consensus in literature and the devastating consequences of missed cervical injuries, Magnetic resonance imaging (MRI) of the neurologically intact symptomatic patient with negative CT scan is frequently done to rule out disco-ligamentous injuries. This study retrospectively evaluates occult disco-ligamentous injuries detected by MRI in patients with no abnormalities detected by modern multi-detector CT scanning and postulates a new theory of ligamentous stability of cervical spine...
December 27, 2016: European Spine Journal
https://www.readbyqxmd.com/read/28025254/shaping-the-output-of-lumbar-flexor-motoneurons-by-sacral-neuronal-networks
#19
Meir Cherniak, Lili Anglister, Aharon Lev-Tov
: The ability to improve motor function in spinal cord injury patients by reactivating spinal central pattern generators (CPGs) requires the elucidation of neurons and pathways involved in activation and modulation of spinal networks in accessible experimental models. Previously we reported on adrenoceptor-dependent sacral control of lumbar-flexor motoneuron firing in newborn rats. The current work focuses on clarification of the circuitry and connectivity involved in this unique modulation and its potential use...
December 26, 2016: Journal of Neuroscience: the Official Journal of the Society for Neuroscience
https://www.readbyqxmd.com/read/28005935/a-biomechanical-stability-study-of-extraforaminal-lumbar-interbody-fusion-on-the-cadaveric-lumbar-spine-specimens
#20
Song Guo, Cheng Zeng, Meijun Yan, Yingchao Han, Dongdong Xia, Guixin Sun, Lijun Li, Mingjie Yang, Jun Tan
BACKGROUND: Transforaminal lumbar interbody fusion (TLIF) is an effective surgery for lumbar degenerative disease. However, this fusion technique requires resection of inferior facet joint to provide access for superior facet joint resection, which results in reduced lumbar spinal stability and unnecessary trauma. We have previously developed extraforaminal lumbar interbody fusion (ELIF) that can avoid back muscle injury with direct nerve root decompression. This study aims to show that ELIF enhances lumbar spinal stability in comparison to TLIF by comparing lumbar spinal stability of L4-L5 range of motion (ROM) on 12 cadaveric spine specimens after performing TLIF or ELIF...
2016: PloS One
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