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Sagittal balance

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https://www.readbyqxmd.com/read/29148136/effects-of-sensitive-electrical-stimulation-based-somatosensory-cueing-in-parkinson-s-disease-gait-and-freezing-of-gait-assessment
#1
Benoît Sijobert, Christine Azevedo, David Andreu, Claudia Verna, Christian Geny
This study aims to investigate the effect of a somatosensory cueing on gait disorders in subjects with Parkinson's disease (PD). After having performed stepping in place and timed up and go assessing tasks, 13 participants with PD were equipped with an electrical stimulator and an inertial measurement unit (IMU) located under the lateral malleolus on the sagittal plane. Electrodes were positioned under the arch of the foot and electrical stimulation (ES) parameters (five 500 µs/phase charge-balanced biphasic pulses delivered at 200 Hz, repeated four times at 10 Hz) adjusted to deliver a sensitive signal...
November 2017: Artificial Organs
https://www.readbyqxmd.com/read/29135086/can-mr-enterography-screen-for-perianal-disease-in-pediatric-inflammatory-bowel-disease
#2
Zehour AlSabban, Nicholas Carman, Rahim Moineddin, Ryan T Lo, Sebastian K King, Jacob C Langer, Thomas D Walters, Anne M Griffiths, Peter C Church, Mary-Louise C Greer
BACKGROUND: Pediatric Crohn's disease is associated with perianal disease (PAD). Magnetic resonance enterography (MRE) assesses small bowel involvement in pediatric inflammatory bowel disease (PIBD). Pelvic MRI (P-MRI) is the gold standard for assessing PAD. PURPOSE: To determine if MRE can accurately detect PAD in PIBD, distinguishing perianal fistulae (PAF) from perianal abscesses (PAA), referenced against P-MRI. STUDY TYPE: Retrospective...
November 14, 2017: Journal of Magnetic Resonance Imaging: JMRI
https://www.readbyqxmd.com/read/29128915/mri-kinematic-analysis-of-t1-sagittal-motion-between-cervical-flexion-and-extension-positions-in-145-patients
#3
Koji Tamai, Zorica Buser, Permsak Paholpak, Kittipong Sessumpun, Patrick C Hsieh, Hiroaki Nakamura, Jeffrey C Wang
PURPOSE: Although the T1 vertebra is considered as an important factor of cervical balance, little is known about its motion between flexion and extension. The purpose of present study was to analyze the T1 sagittal motion using kinematic magnetic resonance imaging (kMRI), and to identify factors that relate to T1 sagittal motion. METHODS: We retrospectively analyzed 145 kMR images taken in weight-bearing neutral, flexion and extension positions. Cervical balance parameters were evaluated in each position...
November 11, 2017: European Spine Journal
https://www.readbyqxmd.com/read/29111131/association-between-condylar-position-and-vertical-skeletal-craniofacial-morphology-a-cone-beam-computed-tomography-study
#4
Maryam Paknahad, Shoaleh Shahidi
OBJECTIVE: Condylar position may play an important role in the establishment of different craniofacial morphologies. The aim of the present study was to determine the possible association between condylar position and vertical skeletal craniofacial morphology in subjects with normal sagittal skeletal pattern using CBCT. METHOD AND MATERIAL: The CBCT images of 45 patients with Class I sagittal skeletal pattern were classified into three balanced groups on the basis of SN-MP angle...
October 27, 2017: International Orthodontics
https://www.readbyqxmd.com/read/29110218/cervical-sagittal-balance-a-biomechanical-perspective-can-help-clinical-practice
#5
REVIEW
Avinash G Patwardhan, Saeed Khayatzadeh, Robert M Havey, Leonard I Voronov, Zachary A Smith, Olivia Kalmanson, Alexander J Ghanayem, William Sears
PURPOSE: In this article, we summarize our work on understanding the influence of cervical sagittal malalignment on the mechanics of the cervical spine. METHODS: Biomechanical studies were performed using an ex vivo laboratory model to study the kinematic and kinetic response of human cervical spine specimens in the setting of cervical sagittal imbalance. The model allowed controlled variations of C2-C7 Sagittal Vertical Alignment (C2-C7 SVA) and T1-Slope so that clinically relevant sagittally malaligned profiles could be prescribed, while maintaining horizontal gaze, and their biomechanical consequences studied...
November 6, 2017: European Spine Journal
https://www.readbyqxmd.com/read/29104177/olfactory-stimulation-induces-cerebellar-vermis-activation-during-sexual-learning-in-male-rats
#6
Zuleyma Samaria Hernández-Briones, Paulina García-Bañuelos, María Elena Hernández, María-Leonor López, Armando Martínez Chacón, Porfirio Carrillo, Genaro Coria-Avila, Jorge Manzo, Luis Isauro García
The cerebellum is a complex structure mainly recognized for its participation in motor activity and balance, and less understood for its role in olfactory processing. Herein, we assessed Fos immunoreactivity (Fos-IR) in the cerebellar vermis following exposure to different odors during sexual training in male rats. Males were allowed to copulate for either one, three or five sessions. One day after the corresponding session they were exposed during 60 min to woodshaving that was either: clean (Control), sprayed with almond scent (Alm) or from cages of sexually receptive females (RF)...
November 7, 2017: Neurobiology of Learning and Memory
https://www.readbyqxmd.com/read/29095412/cervical-sagittal-range-of-motion-as-a-predictor-of-symptom-severity-in-cervical-spondylotic-myelopathy
#7
Kristen J Nicholson, Paul W Millhouse, Emily Pflug, Barrett Woods, Gregory D Schroeder, D Greg Anderson, Alan S Hilibrand, Christopher K Kepler, Mark F Kurd, Jeffrey A Rihn, Alexander Vaccaro, Kris E Radcliff
STUDY DESIGN: Retrospective review of radiographic data and functional outcomes. OBJECTIVE: Evaluate whether myelopathy symptom severity upon presentation corresponds to sagittal plane alignment or non-myelopathy symptoms, such as pain, in patients with cervical spondylotic myelopathy (CSM). SUMMARY OF BACKGROUND DATA: Cervical sagittal balance is an important parameter in the outcome of surgical reconstruction. However, the effect of sagittal alignment on symptom severity in patients who have not undergone spine surgery is not well defined...
October 31, 2017: Spine
https://www.readbyqxmd.com/read/29095408/impact-of-iliac-instrumentation-on-the-quality-of-life-of-patients-with-adult-spine-deformity
#8
Mar Pérez Martin-Buitrago, Javier Pizones, Francisco Javier Sánchez Perez-Grueso, Mariana Díaz Almirón, Alba Vila-Casademunt, Ibrahim Obeid, Ahmet Alanay, Frank Kleinstück, Emre R Acaroglu, Ferran Pellisé
STUDY DESIGN: Retrospective comparative analysis of data collected prospectively in an adult spine deformity (ASD) multicenter database. OBJECTIVE: To evaluate the impact of the iliac screws on the quality of life of ASD patients compared with those instrumented above the pelvis (L5/S1/S2). SUMMARY OF BACKGROUND DATA: The impact on patient's daily activities and functions, of immobilizing the sacroiliac joint with iliac screws for the treatment of ASD is still underexplored...
October 31, 2017: Spine
https://www.readbyqxmd.com/read/29067951/radiological-analysis-of-thoracolumbar-junctional-degenerative-kyphosis-in-patients-with-lumbar-degenerative-kyphosis
#9
Chen-Jun Liu, Zhen-Qi Zhu, Kai-Feng Wang, Shuo Duan, Shuai Xu, Hai-Ying Liu
BACKGROUND: Thoracolumbar junction (TLJ) is the transitional area between the lower thoracic spine and the upper lumbar spine. Vertebral compression fractures and proximal junctional kyphosis following spine surgery often occur in this area. Therefore, the study of development and mechanisms of thoracolumbar junctional degeneration is important for planning surgical management. This study aimed to review radiological parameters of thoracolumbar junctional degenerative kyphosis (TLJDK) in patients with lumbar degenerative kyphosis and to analyze compensatory mechanisms of sagittal balance...
November 5, 2017: Chinese Medical Journal
https://www.readbyqxmd.com/read/29061449/influence-of-lumbar-lordosis-on-the-outcome-of-decompression-surgery-for-lumbar-canal-stenosis
#10
Han Soo Chang
OBJECT: Although the sagittal spinal balance plays an important role in the spinal deformity surgery, its role in decompression surgery for lumbar canal stenosis is not well understood. To investigate the hypothesis that the sagittal spinal balance also plays a role in decompression surgery for lumbar canal stenosis, we performed a prospective cohort study analyzing the correlation between the preoperative lumbar lordosis and the outcome. MATERIALS AND METHODS: We analyzed a cohort of 85 consecutive patients who underwent decompression for lumbar canal stenosis during the period from 2007 to 2011...
October 20, 2017: World Neurosurgery
https://www.readbyqxmd.com/read/29047242/effect-of-sagittal-balance-on-risk-of-falling-after-lateral-lumbar-interbody-fusion-surgery-combined-with-posterior-surgery
#11
Byung Ho Lee, Jae Ho Yang, Hak Sun Kim, Kyung Soo Suk, Hwan Mo Lee, Jin Oh Park, Seong Hwan Moon
PURPOSE: To demonstrate the impact of correcting sagittal balance (SB) on functional outcomes of surgical treatment for degenerative spinal disease and actual falls via utilization of new minimally invasive lumbar fusion techniques via a lateral approach. MATERIALS AND METHODS: From November 2011 to March 2015, we enrolled 56 patients who underwent minimally invasive lateral lumbar interbody fusion (LLIF) and matched 112 patients receiving decompression/postero-lateral fusion (PLF) surgery for lumbar spinal stenosis...
November 2017: Yonsei Medical Journal
https://www.readbyqxmd.com/read/29037973/comparison-of-anterior-posterior-vertebral-column-resection-versus-anterior-posterior-spinal-fusion-for-severe-and-rigid-scoliosis
#12
Chunguang Zhou, Limin Liu, Yueming Song, Ganjun Feng, Xi Yang, Lei Wang
BACKGROUND CONTEXT: Many different correction methods have been reported to treat severe and rigid scoliosis. In the past, anterior/posterior spinal fusion (APSF), which included an anterior release followed by posterior instrumented fusion was widely applied. In recent years, anterior/posterior vertebral column resection (APVCR) is used to treat severe and rigid scoliosis. PURPOSE: To compare the clinical results of APSF and APVCR for severe and rigid scoliosis...
October 13, 2017: Spine Journal: Official Journal of the North American Spine Society
https://www.readbyqxmd.com/read/29026895/non-radiographic-methods-of-measuring-global-sagittal-balance-a-systematic-review
#13
REVIEW
Larry Cohen, Sarah Kobayashi, Milena Simic, Sarah Dennis, Kathryn Refshauge, Evangelos Pappas
BACKGROUND: Global sagittal balance, describing the vertical alignment of the spine, is an important factor in the non-operative and operative management of back pain. However, the typical gold standard method of assessment, radiography, requires exposure to radiation and increased cost, making it unsuitable for repeated use. Non-radiologic methods of assessment are available, but their reliability and validity in the current literature have not been systematically assessed. Therefore, the aim of this systematic review was to synthesise and evaluate the reliability and validity of non-radiographic methods of assessing global sagittal balance...
2017: Scoliosis and Spinal Disorders
https://www.readbyqxmd.com/read/29018964/a-method-to-quantify-the-cone-of-economy
#14
Ram Haddas, Isador H Lieberman
STUDY DESIGN: A non-randomized, prospective, concurrent control cohort study. OBJECTIVE: The purpose of this study is to develop and evaluate a method to quantify the dimensions of the cone of economy (COE) and the energy expenditure associated with maintaining a balanced posture within the COE, scoliosis patients and compare them to matched non-scoliotic controls in a group of adult degenerative. Balance is defined as the ability of the human body to maintain its center of mass (COM) within the base of support with minimal postural sway...
October 10, 2017: European Spine Journal
https://www.readbyqxmd.com/read/28994028/treatment-for-degenerative-lumbar-spondylolisthesis-current-concepts-and-new-evidence
#15
REVIEW
Andre M Samuel, Harold G Moore, Matthew E Cunningham
PURPOSE OF REVIEW: Current guidelines for the optimal treatment degenerative spondylolisthesis are weak and based on limited high-quality evidence. RECENT FINDINGS: There is some moderate evidence that decompression alone may be a feasible treatment with lower surgical morbidity and similar outcomes to fusion when performed in a select population with a low-grade slip. Similarly, addition of interbody fusion may be best suited to a subset of patients with high-grade degenerative spondylolisthesis, although this remains controversial...
December 2017: Current Reviews in Musculoskeletal Medicine
https://www.readbyqxmd.com/read/28987526/anterior-lumbar-sagittal-alignment-after-anterior-or-lateral-interbody-fusion
#16
M Afathi, F Zairi, P Devos, M Allaoui, P Marinho, D Chopin, R Assaker
PURPOSE: Anterior or lateral interbody fusion is a treatment option for lumbar disc disease. A segmental change occurs after such surgery. This study was designed to evaluate the changes in the lumbar regional alignment after a single or two-level standalone anterior or lateral interbody fusion (ALIF or LLIF). METHODS: Data from patients referred to our institution between March 2013 and November 2015 for standalone ALIF or LLIF for low-grade isthmic spondylolisthesis or degenerative discopathy were retrospectively included in our analysis...
October 4, 2017: Orthopaedics & Traumatology, Surgery & Research: OTSR
https://www.readbyqxmd.com/read/28970972/an-exploration-of-strategies-used-by-dressage-horses-to-control-moments-around-the-center-of-mass-when-performing-passage
#17
Hilary M Clayton, Sarah Jane Hobbs
BACKGROUND: Locomotion results from the generation of ground reaction forces (GRF) that cause translations of the center of mass (COM) and generate moments that rotate the body around the COM. The trot is a diagonally-synchronized gait performed by horses at intermediate locomotor speeds. Passage is a variant of the trot performed by highly-trained dressage horses. It is distinguished from trot by having a slow speed of progression combined with great animation of the limbs in the swing phase...
2017: PeerJ
https://www.readbyqxmd.com/read/28966814/biomechanical-study-of-rod-stress-after-pedicle-subtraction-osteotomy-versus-anterior-column-reconstruction-a-finite-element-study
#18
Jacob Januszewski, Joshua M Beckman, Jeffrey E Harris, Alexander W Turner, Chun Po Yen, Juan S Uribe
BACKGROUND: In an effort to minimize rod fractures and nonunion in pedicle subtraction osteotomy (PSO) constructs, surgeons have adopted multirod constructs and interbody cages. Anterior column realignment (ACR) with posterior column osteotomies is a minimally invasive alternative to PSO in sagittal balance correction, however, there is a paucity of evidence with respect to rod survival. METHODS: Three-dimensional (3D) finite-element-model of a T12-sacrum spine segment was used to compare a 25° PSO at L3 and an ACR with a posterior column osteotomy and 30° hyperlordotic interbody cage at L3-4...
2017: Surgical Neurology International
https://www.readbyqxmd.com/read/28965450/improved-restoration-of-thoracic-kyphosis-using-a-rod-construct-with-differentiated-rigidity-in-the-surgical-treatment-of-adolescent-idiopathic-scoliosis
#19
Søren Ohrt-Nissen, Casper Dragsted, Benny Dahl, John A I Ferguson, Martin Gehrchen
OBJECTIVE The objective of this study was to compare postoperative sagittal alignment among 3 rod constructs with different rigidity profiles. METHODS This was a dual-center retrospective cohort study involving 2 consecutive cohorts in which patients were surgically treated for adolescent idiopathic scoliosis. Lenke Type 5 curves were excluded. Patients were operated on with all-pedicle screw instrumentation using 3 different rod constructs. The first group was operated on using a hybrid construct (HC) consisting of a normal circular rod on the convex side and a beam-like rod (BR) on the concave side...
October 2017: Neurosurgical Focus
https://www.readbyqxmd.com/read/28960822/analysis-of-spino-pelvic-sagittal-alignment-in-young-chinese-patients-with-lumbar-disc-herniation
#20
Han Fei, Wei-Shi Li, Zhuo-Ran Sun, Qing-Wei Ma, Zhong-Qiang Chen
OBJECTIVE: Few studies have concentrated on the sagittal alignment of lumbar disc herniation (LDH), especially the parameters of the pelvis, and controversy exists about whether pelvic morphology is involved in the pathogenesis of LDH. The present study analyzed the characteristics of the sagittal alignment in young Chinese LDH patients and explored the impact of pelvic morphology on the pathogenesis of LDH. METHODS: A retrospective analysis was conducted on 100 young patients with LDH (69 men and 31 women, aged 18-35 years), and the clinical and imaging findings met the criteria for the diagnosis of LDH...
August 2017: Orthopaedic Surgery
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