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Junsig Wang, Jason C Gillette
BACKGROUND: Individuals often carry items in one hand instead of both hands during activities of daily living. Research Question The purpose of this study was to investigate low back and lower extremity frontal plane moments for loaded limb stance and unloaded limb stance when carrying symmetric and asymmetric loads during stair negotiation. METHODS: Participants were instructed to ascend and descend a three-step staircase at preferred pace using a right leg lead and a left leg lead for each load condition: no load, 20% body weight (BW) bilateral load, and 20% BW unilateral load...
June 19, 2018: Gait & Posture
Ai-Min Wu, Kai Zhang, Xun-Lin Li, Xiao-Fei Cheng, Tang-Jun Zhou, Lin Du, Chen Chen, Hai-Jun Tian, Xiao-Jiang Sun, Chang-Qing Zhao, Yan Michael Li, Jie Zhao
Background: The L5 nerve root could be compressed at both L4-5 and L5-S1 regions. If L5 nerve root has confirmed compression at L4-5 level and questionable compression at L5-S1 foramina, performing both surgeries at L4-5 and L5-S1 levels may induce unnecessary extra surgery on L5-S1; however, ignoring foraminal stenosis of L5/S1 may require re-exploration. Methods: Two hundred seventeen patients with L5 nerve root compressed at L4-5 lateral access were performed with L4-5 decompression and interbody fusion...
May 2018: Quantitative Imaging in Medicine and Surgery
Ella Been, Sara Shefi, Leonid Kalichman, Jeannie F Bailey, Michalle Soudack
Spinal muscle cross-sectional area has been highly associated with spinal pathology. Despite the medium-high prevalence of spinal pathology in children, there is very limited knowledge regarding muscle size and growth pattern in individuals younger than 20 years of age. The aim of this study is to analyze the change in size and symmetry of spinal muscles (erector spinae, multifidus, psoas and quadratus lumborum) in children 2-20 years of age. We studied reformatted images from 91 abdominal computed tomographic scans of children aged 2-20 years, from an existing imaging dataset...
June 21, 2018: Journal of Anatomy
Manon Sterba, Pierre-Jean Arnoux, Hubert Labelle, William C Warner, Carl-Éric Aubin
PURPOSE: To study the risks of spondylolysis due to extrinsic loading conditions related to sports activities and intrinsic spino-pelvic postural parameters [pelvic incidence (PI) and sacral slope (SS)]. METHODS: A comprehensive osseo-disco-ligamentous L4-S1 finite element model was built for three cases with spondylolysis representing three different spino-pelvic angular configurations (SS = 32°, 47°, 59° and PI = 49°, 58°, 72°, respectively). After simulating the standing posture, 16 dynamic loading conditions were computationally tested for each configuration by combining four sport-related loads (compression, sagittal and lateral bending and axial torque)...
June 20, 2018: European Spine Journal
Ju-Wan Seuk, Junseok Bae, Sang-Ho Lee, Sang-Ha Shin, Ho Jin Kim
BACKGROUND: Even with its growing popularity, there weren't any comparative studies that explored MCID of HRQoLs following LIF performed on a single-level adult LGIS. OBJECTIVE: The purpose of this study is to investigate factors related to MCID of HRQoLs following instrumented LIF performed on a single-level adult LGIS. METHODS: Consecutive patients who underwent instrumented LIF for single-level LGIS were reviewed. The inclusion criteria were : adult patients who underwent L4-5 or L5-S1, ALIF or TLIF with a posterior screw fixation, and had a minimum 36-month post-operative follow-up period...
June 16, 2018: World Neurosurgery
Saman Madinei, Hossein Motabar, Xiaopeng Ning
Sudden loading is a major risk factor for work-related lower back injuries among occupations involving manual material handling (MMH). The current study explored the effects of external weight configuration on trunk biomechanics and trunk rotational stiffness in the sagittal plane during sudden loading. Fifteen asymptomatic volunteers experienced sudden loadings using the same magnitude of weight (9 kg) with two different configurations (medially- or laterally-distributed) at three levels of height (low, middle, and high)...
June 19, 2018: Ergonomics
Yunus Emre Kundakci, Nadire Unver Dogan, Ibrahim Guler, Ismihan Ilknur Uysal, Zeliha Fazliogullari, Ahmet Kagan Karabulut
PURPOSE: We aimed to research in detail the morphology of the facet orientation (FO) and tropism (FT) in degenerative diseases. METHOD: This study consisted of patients with disc degeneration (DD) and with lumbar spondylolisthesis (LS) as well as a control group without these two diseases. The group of patients with DD was separated by DD grades. Vertebral body and intervertebral discs' (IVDs) morphometric values, facet joint osteoarthritis (OA) grading, FO and FT were examined in all the groups...
June 16, 2018: Surgical and Radiologic Anatomy: SRA
Fatih Yakar, Murat Zaimoglu, Ihsan Dogan, Batuhan Bakirarar, Umit Eroglu, Cihan Kircil, Onur Ozgural, Melih Ucer, Cemil Kilinc, Altan Demirel, Efe Guner, Melih Bozkurt, Yusuf Sukru Caglar
OBJECTIVE: To examine the surgical results of unilateral lumbar discectomy in patients with bilateral leg pain and discuss short- and long-term outcomes within the limits of lumbar decompression. METHODS: We analyzed 60 patients with unilateral disk herniation who underwent unilateral lumbar discectomy and hemipartial laminectomy between 2014 and 2017. Group 1 (30 patients) had bilateral leg pain and unilateral lumbar disk herniation. Pain lateralization was determined radiologically...
June 12, 2018: World Neurosurgery
David J Kirby, Harry C Dietz, Paul D Sponseller
BACKGROUND: We studied the prevalence and treatment outcomes of spondylolisthesis in patients with Loeys-Dietz syndrome (LDS). METHODS: Clinical data and lumbosacral imaging of 138 patients with LDS were reviewed. Spondylolisthesis (L4-L5 or L5-S1) and spondylolysis were characterized by multimodal imaging and correlated with clinical data. Treatments and outcomes were characterized for patients with spondylolisthesis. Associations were determined using the Fisher exact, Mann-Whitney, and Student t tests (α=0...
June 8, 2018: Journal of Pediatric Orthopedics
Arvind G Kulkarni, Shashidhar Bangalore Kantharajanna, Abhilash N Dhruv
Background: The conventional interlaminar approach is adequate for access to most disc herniations in lumbar spine surgery. The access to cranially and caudally migrated disc fragments, by conventional interlaminar fenestration, requires an extension of the fenestration with the potential destruction of the facet joint complex and consequent postsurgical instability. To describe the technique and results of the translaminar technique of targeted discectomy using tubular retractors for the surgical treatment of cranially and caudally extruded discs...
May 2018: Indian Journal of Orthopaedics
Andrea Hemmerich, Emily Geens, Tara Diesbourg, Geneviève A Dumas
BACKGROUND: The biomechanics of mothers' birthing positions and their impact on maternal and newborn health outcomes are poorly understood. Our objectives were to determine the loads applied to the female pelvis during dynamic movement that may occur during childbirth; findings are intended to inform clinical understanding and further research on birth positioning mechanics. METHODS: An optical motion capture system and force platforms were used to collect upright and supine movement data from two pregnant and three non-pregnant participants...
May 24, 2018: Clinical Biomechanics
Chi Sun, Hongli Wang, Jianyuan Jiang, Feizhou Lu, Xiaosheng Ma, Xinlei Xia
OBJECTIVE: To radiologically measure the parameters of endplates and the apophyseal ring and suggest an applicable length for a lumbar interbody cage for Chinese patients. METHODS: Twenty-four volunteers were enrolled to receive lumbar CT. On the endplate plane, the diameters of the endplates (L1-S1) were measured along the axis of the cage with different lumbar interbody fusion procedures. While mid-OD and max-OD were defined as the minimal and maximal diameters of the endplates in TLIF, side-SD, mid-SD and TD represented the diameters of endplates in PLIF, ALIF and OLIF/XLIF/DLIF, respectively...
June 7, 2018: World Neurosurgery
Cristina Barrena López, Beatriz De la Calle García, Rosario Sarabia Herrero
Ganglioneuroma (GN) is a slow-growing tumor originating from the neural crest-derived cells, which form the sympathetic nervous system. These tumors can affect anywhere along the peripheral autonomic ganglion sites, being most commonly found in the mediastinum and retroperitoneum. Spinal GNs are extremely rare and, so far, only 1 case arising from a lumbar nerve root has been reported in English literature. GNs are often asymptomatic, and the majority of them, are found incidentally in healthy subjects. Due to its slow growth, symptoms may result from the compressive effect of the tumor...
June 7, 2018: World Neurosurgery
Ju-Eun Kim, Dae-Jung Choi
Background context: Lumbar foraminal stenosis or extraforaminal stenosis is a common cause of spinal cord radiculopathy. Recently, several authors have introduced an endoscopy-based spinal surgery technique. Purpose: The study aimed to introduce far lateral approach of biportal arthroscopic technique using 30° arthroscopy for foraminal decompression of L5-S1. Study design: Technical note. Patient sample: 12 consecutive patients...
June 2018: Journal of Orthopaedics
Dae-Jung Choi, Ju-Eun Kim, Je-Tea Jung, Yong-Sang Kim, Han-Jin Jang, Bang Yoo, Il-Ho Kang
The stenosing foramen of L5-S1 by several degenerative diseases is one of the challenging areas on surgical approaching because of the deeper depth and steep slope in the lumbosacral junction. The floating view using unilateral biportal endoscopic spine surgery rather than docking into the Kambin's zone can make the foraminal structures seen panoramically and permit dynamic handling of various instruments without destroying the facet joint and causing iatrogenic instability. Fine discrimination of structural margins in helps of the higher magnification and gentle manipulation of neural structures just as in open spine surgery could be guaranteed using floating technique from the target structures...
June 2018: Asian Spine Journal
Min-Woo Kim, Kyu Yeol Lee, Seunghyun Lee
STUDY DESIGN: A retrospective cohort study. PURPOSE: To investigate the factors affecting symptoms in young adults with L5 spondylolysis. OVERVIEW OF LITERATURE: L5 spondylolysis is a common disease. However, not all patients diagnosed with L5 spondylolysis exhibit symptoms. This study examined the factors associated with the symptoms of young adults with L5 spondylolysis. METHODS: The medical records of 70 young adults (mean age, 31...
June 2018: Asian Spine Journal
Hassan Ghandhari, Ebrahim Ameri, Habib Hasani, Mir Bahram Safari, Ali Tabrizi
STUDY DESIGN: Retrospective case control study. PURPOSE: In current study, we compared the incidence of facet tropism (FT) in patients with lumbar disc herniation and normal controls. OVERVIEW OF LITERATURE: It has been suggested that FT can be associated with increased risk of lumbar disc herniation. METHODS: A total of 66 and 63 patients with L4/L5 and L5/S1 disc herniation, respectively, were evaluated in the present study...
June 2018: Asian Spine Journal
Ming-Lun Lu, Jonathan S Dufour, Eric B Weston, William S Marras
Information on spinal loading for using lift assist systems for airport baggage handling is lacking. We conducted a laboratory study to evaluate a vacuum lift system for reducing lumbar spinal loads during baggage loading/unloading tasks. Ten subjects performed the tasks using the industry average baggage weight of 14.5 kg on a typical two-shelved baggage cart with or without using the lift system (i.e. lifting technique). Repeated measures analysis of variance (2 tasks × 2 shelf heights x 2 techniques) was used...
July 2018: Applied Ergonomics
Xu Wei, Li Gengwu, Chen Chao, Li Yifan, Sang Shang, Hu Ruixi, Ji Yunhan, Zhu Xiaodong, Li Zhikun
BACKGROUND: Studies have shown that lumbar disc herniation, degenerative lumbar instability, and other degenerative lumbar spinal diseases are often secondary to disc degeneration. By studying the intervertebral disc, researchers have clarified the pathological changes involved in intervertebral disc degeneration but have ignored the roles of biomechanical factors in the development of disc degeneration. This study aims to investigate the relationships among the location, scope, and extent of lumbar disc degeneration and sagittal spinal-pelvic parameters...
June 4, 2018: Journal of Orthopaedic Surgery and Research
G Maltese, S V Tan, E Bruno, A Brackenridge, S Thomas
BACKGROUND: Hereditary Neuropathy with liability to Pressure Palsies (HNPP) is an autosomal dominant neuropathy, associated with deletion of the Peripheral Myelin Protein-22 (PMP-22) gene, causing recurrent painless palsies with age of onset between 10 and 30 years old. Only a few cases of Type 2 Diabetes and HNPP have been described and the coexistence of HNPP and Type 1 diabetes has never been reported. CASE REPORT: A 54-year old man with a history of Type 1 diabetes, managed with continuous subcutaneous insulin infusion (CSII), presented with deterioration of long-standing motor and sensory symptoms, previously attributed to golfer's elbow, diabetic neuropathy and spinal degenerative disease...
June 4, 2018: Diabetic Medicine: a Journal of the British Diabetic Association
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