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https://www.readbyqxmd.com/read/29772956/lumbar-muscle-structure-predicts-operational-postures-in-active-duty-marines
#1
David B Berry, Bahar Shahidi, Ana E Rodríguez-Soto, Jan M Hughes-Austin, Karen R Kelly, Samuel R Ward
Study Design Cross-sectional. Background The relationship between lumbar spine posture and muscle structure is not well understood. Objectives Investigate the predictive capacity of muscle structure on lumbar spine posture in active duty Marines. Methods Fouty-three Marines were scanned using an upright magnetic resonance imaging (MRI) scanner while standing unloaded and standing, sitting, and prone on elbows with body armor. Cobb, horizontal, and sacral angles were measured. Marines were then scanned unloaded in supine using a supine MRI scanner...
May 17, 2018: Journal of Orthopaedic and Sports Physical Therapy
https://www.readbyqxmd.com/read/29771733/haemodilution-and-head-down-tilting-induce-functional-injury-in-the-rat-optic-nerve-a-model-for-peri-operative-ischemic-optic-neuropathy
#2
Steven Roth, John Dreixler, Nancy J Newman
BACKGROUND: Mechanisms of peri-operative ischaemic optic neuropathy remain poorly understood. Both specific pre-operative and intra-operative factors have been examined by retrospective studies, but no animal model currently exists. OBJECTIVES: To develop a rodent model of peri-operative ischaemic optic neuropathy. In rats, we performed head-down tilt and/or haemodilution, theorising that the combination damages the optic nerve. DESIGN: Animal study...
May 15, 2018: European Journal of Anaesthesiology
https://www.readbyqxmd.com/read/29763470/the-influence-of-spinal-pelvic-parameters-on-the-prevalence-of-endplate-modic-changes-in-degenerative-thoracolumbar-lumbar-kyphosis-patients
#3
Weiwei Xia, Chenjun Liu, Shuo Duan, Shuai Xu, Kaifeng Wang, Zhenqi Zhu, Haiying Liu
BACKGROUND: The typical degeneration of the vertebral endplate shown in MRI imaging is Modic change. The aim of this study was to observe the distribution of the Modic changes of vertebral endplate in degenerative thoracolumbar/lumbar kyphosis (DTK/LK) patients and analyse the correlation between spinal-pelvic parameters and Modic changes. METHODS: The imaging data of 58 patients diagnosed with DTK/LK (coronal Cobb angle<10°with sagittal imbalance) in our hospital from March 2016 to May 2017 were reviewed retrospectively...
2018: PloS One
https://www.readbyqxmd.com/read/29757809/applicability-of-isnt-rule-using-bmo-mrw-to-differentiate-between-healthy-and-glaucomatous-eyes
#4
Do Young Park, Eun Jung Lee, Jong Chul Han, Changwon Kee
PURPOSE: We evaluated the applicability of the ISNT rule using Bruch's membrane opening minimum rim width (BMO-MRW) in healthy eyes and eyes with normal tension glaucoma (NTG). METHODS: 124 healthy eyes and 136 NTG eyes were analyzed. Using two-dimensional disc photographs, neuroretinal rim (NRR) thickness was measured at the superior, inferior, nasal, and temporal sides of the optic disc. Using spectral domain-optical coherence tomography (SD-OCT), BMO-MRW was measured at the same regions...
May 11, 2018: Journal of Glaucoma
https://www.readbyqxmd.com/read/29750755/predicting-factors-at-skeletal-maturity-for-curve-progression-and-low-back-pain-in-adult-patients-treated-non-operatively-for-adolescent-idiopathic-scoliosis-with-thoracolumbar-lumbar-curves-a-mean-25-year-follow-up
#5
Masayuki Ohashi, Kei Watanabe, Toru Hirano, Kazuhiro Hasegawa, Keiichi Katsumi, Hirokazu Shoji, Mizouchi Tatsuki, Naoto Endo
STUDY DESIGN: A retrospective, long-term follow-up study. OBJECTIVE: We aimed to clarify the predicting factors at skeletal maturity for future curve progression and low back pain (LBP) in adolescent idiopathic scoliosis (AIS) with thoracolumbar/lumbar (TL/L) curve. SUMMARY OF BACKGROUND DATA: TL/L curves are likely to progress after skeletal maturity and cause LBP. METHODS: Of 147 patients treated non-operatively for AIS with TL/L curve, 56 (55 females; average age at the time of survey, 39...
May 10, 2018: Spine
https://www.readbyqxmd.com/read/29732092/impact-of-the-lipid-bilayer-on-energy-transfer-kinetics-in-the-photosynthetic-protein-lh2
#6
John I Ogren, Ashley L Tong, Samuel C Gordon, Aurélia Chenu, Yue Lu, Robert E Blankenship, Jianshu Cao, Gabriela S Schlau-Cohen
Photosynthetic purple bacteria convert solar energy to chemical energy with near unity quantum efficiency. The light-harvesting process begins with absorption of solar energy by an antenna protein called Light-Harvesting Complex 2 (LH2). Energy is subsequently transferred within LH2 and then through a network of additional light-harvesting proteins to a central location, termed the reaction center, where charge separation occurs. The energy transfer dynamics of LH2 are highly sensitive to intermolecular distances and relative organizations...
March 28, 2018: Chemical Science
https://www.readbyqxmd.com/read/29730457/anterior-posterior-length-discrepancy-of-the-spinal-column-in-adolescent-idiopathic-scoliosis-a-3d-ct-study
#7
Rob C Brink, Tom P C Schlösser, Marijn van Stralen, Koen L Vincken, Moyo C Kruyt, Steve C N Hui, Max A Viergever, Winnie C W Chu, Jack C Y Cheng, René M Castelein
BACKGROUND CONTEXT: One of the characteristics of reported observations in adolescent idiopathic scoliosis (AIS) is that the thoracic spine is longer anteriorly than posteriorly, more pronounced around the apex than the transitional zones. This reversal of the normal kyphotic anatomy of the thoracic spine is related to questions of etiopathogenesis of AIS. The changes in the anatomy of the anterior column have been described rather in detail, however, the role of the posterior spinal column and the laminae has so far not been elucidated...
May 3, 2018: Spine Journal: Official Journal of the North American Spine Society
https://www.readbyqxmd.com/read/29680510/srs-schwab-grade-4-osteotomy-for-congenital-thoracolumbar-kyphosis-a-minimum-of-2-years-follow-up-study
#8
Benlong Shi, Qinghua Zhao, Liang Xu, Zhen Liu, Xu Sun, Zezhang Zhu, Yong Qiu
BACKGROUND: Several osteotomy techniques including pedicle subtraction osteotomy and vertebral column resection have been employed in the correction of congenital kyphosis (CK) and satisfying outcomes have been demonstrated. However, the SRS-Schwab Grade 4 osteotomy, defined as resection of posterior elements, partial vertebral body and superior adjacent disc, is rarely reported in the treatment of CK. PURPOSE: To evaluate the efficiency and safety of SRS-Schwab Grade 4 osteotomy in CK patients, and to propose its optimal indication...
April 19, 2018: Spine Journal: Official Journal of the North American Spine Society
https://www.readbyqxmd.com/read/29609565/the-clinical-relevance-of-the-presence-of-bridging-syndesmophytes-on-kyphosis-correction-and-maintenance-following-pedicle-subtraction-osteotomy-for-thoracolumbar-kyphotic-deformity-in-ankylosing-spondylitis-a-comparative-cohort-study
#9
Sai-Hu Mao, Zong-Xian Feng, Bang-Ping Qian, Yong Qiu
BACKGROUND: The presence of bridging syndesmophytes (BS) in spinal osteotomy region serves traditionally as one critical determinant for selection of osteotomy techniques. While nowadays the proportion of kyphotic ankylosing spondylitis (AS) patients receiving pedicle subtraction osteotomy (PSO) with yet mobile neighboring disc has seen a substantial increase. Literatures investigating the clinical relevance of the presence of BS on kyphosis correction and maintenance following PSO are scarce...
April 2, 2018: BMC Musculoskeletal Disorders
https://www.readbyqxmd.com/read/29567792/prevalence-of-the-optic-disc-anomalies-in-the-adult-south-indian-population
#10
Shikha Talwar Bassi, Ronnie George, Swarnali Sen, Rashima Asokan, Vijaya Lingam
PURPOSE: To determine the prevalence of congenitally abnormal disc (all anomalies) in an adult population in southern India. METHODS: Subjects aged ≥40 years (n=6013) underwent a complete ophthalmic examination. Optic disc anomalies were diagnosed according to the definitions given in the article. RESULTS: Optic disc anomalies were found in 81 eyes of 66 (1.1%, 95% CIs 0.00834 to 0.01361) patients. The prevalence of each anomaly in the descending order was peripapillary myelinated nerve fibre (0...
March 22, 2018: British Journal of Ophthalmology
https://www.readbyqxmd.com/read/29561500/optic-disc-features-in-highly-myopic-eyes-the-zoc-bhvi-high-myopia-cohort-study
#11
Zhixi Li, Xinxing Guo, Ou Xiao, Pei Ying Lee, Ran Liu, Decai Wang, Padmaja Sankaridurg, Mingguang He
SIGNIFICANCE: Some studies reported that optic disc tilt and rotation might be risk factors for the susceptibility of high myopic eyes to develop glaucoma. However, data regarding optic disc manifestations in high myopia participants are few. It is crucial to characterize the features of optic disc manifestations among high myopes. PURPOSE: To describe optic disc characteristics of Chinese highly myopic eyes and to investigate associated factors. METHODS: This cross-sectional, observational study included 890 Chinese with bilateral high myopia (defined as ≤-6...
March 21, 2018: Optometry and Vision Science: Official Publication of the American Academy of Optometry
https://www.readbyqxmd.com/read/29533036/-difference-of-spino-pelvic-sagittal-alignment-between-lumbar-disc-herniation-and-lumbar-canal-stenosis-in-adults
#12
Feng Xie, Jun Bian, Zhi-Wei Wang, Wei-Shan Chen
OBJECTIVE: To study the difference of spino-pelvic sagittal alignment between lumbar disc herniation(LDH) and lumbar canal stenosis(LCS) in adults. METHODS: The integrated imaging data of 88 patients with lumbar disc herniation (42 cases) or lumbar canal stenosis(46 cases) were searched from January 1, 2015 to September 10, 2016 in our hospital.Twenty-two cases were excluded because of age factor, 36 cases of LDH (LDH group) and 30 cases of LCS (LCS group) were internalized in the study...
January 25, 2018: Zhongguo Gu Shang, China Journal of Orthopaedics and Traumatology
https://www.readbyqxmd.com/read/29516048/the-importance-of-ganglion-cell-complex-investigation-in-myopic-patients
#13
Maria Veronica Strehaianu, Dana Dascalescu, Catalina Ionescu, Miruna Burcel, Vasile Potop, Catalina Corbu
Glaucoma is an optic neuropathy that affects the ganglion cell complex in all its components: cell bodies, dendrites, and axons, the dendritic arbor being the first one damaged. This is the reason why the thickness of the ganglion cell and internal plexiform layers can be taken into account as an early predictor of the glaucomatous changes, along with the retinal nerve fiber layer (RNFL) thickness. However, due to disc tilting and peripapillary atrophy, the RNFL evaluation may be prone to errors in myopic patients...
October 2017: Romanian Journal of Ophthalmology
https://www.readbyqxmd.com/read/29501748/a-novel-preoperative-trajectory-evaluation-method-for-l5-s1-transforaminal-percutaneous-endoscopic-lumbar-discectomy
#14
Sang Soo Eun, Sang-Ho Lee, Wei Chiang Liu, H Yener Erken
BACKGROUND CONTEXT: L5-S1 transforaminal percutaneous endoscopic lumbar discectomy (PELD) is a demanding procedure because of structures such as iliac crest, L5 transverse process, hypertrophic L5-S1 facet joint, and sacral ala. There has been no definite preoperative evaluation method to evaluate the surgical validity of L5-S1 transforaminal PELD. PURPOSE: The authors report a new preoperative trajectory evaluation method for L5-S1 transforaminal PELD using magnetic resonance imaging (MRI) or computed tomography (CT) examinations...
February 28, 2018: Spine Journal: Official Journal of the North American Spine Society
https://www.readbyqxmd.com/read/29433530/correlation-between-lumbar-intervertebral-disc-height-and-lumbar-spine-sagittal-alignment-among-asymptomatic-asian-young-adults
#15
Feng Zhang, Kai Zhang, Hai-Jun Tian, Ai-Min Wu, Xiao-Fei Cheng, Tang-Jun Zhou, Jie Zhao
BACKGROUND: To investigate the distribution and characteristics of the lumbar intervertebral disc height (IDH) in asymptomatic Asian population and to determine whether the lumbar IDH is related to the lumbar spine sagittal alignment. METHODS: A cohort of 169 cases of asymptomatic volunteers was enrolled from January 2014 to July 2016. All participants underwent magnetic resonance imaging of the lumbar spine and panoramic radiography of the spine. Panoramic radiographs of the spine were taken to evaluate pelvic incidence (PI), sacral slope (SS), and pelvic tilt (PT) using Surgimap® software...
February 12, 2018: Journal of Orthopaedic Surgery and Research
https://www.readbyqxmd.com/read/29421295/association-between-optic-nerve-head-deformation-and-retinal-microvasculature-in-high-myopia
#16
Mi Sun Sung, Tae Hee Lee, Hwan Heo, Sang Woo Park
PURPOSE: To evaluate the retinal microvasculature of peripapillary and macular regions in highly myopic eyes and investigate the association between the vascular parameters and optic nerve head (ONH) deformation. DESIGN: Cross-sectional study. METHODS: Seventy-one subjects with highly myopic eyes and 26 subjects with emmetropic eyes were included. Horizontal B-scan images of the ONH were obtained using optical coherence tomography (OCT) and horizontal tilt angles were measured...
April 2018: American Journal of Ophthalmology
https://www.readbyqxmd.com/read/29415913/hybrid-method-of-transvertebral-foraminotomy-combined-with-anterior-cervical-decompression-and-fusion-for-multilevel-cervical-disease
#17
Yu Yamamoto, Masahito Hara, Yusuke Nishimura, Shoichi Haimoto, Toshihiko Wakabayashi
Transvertebral foraminotomy (TVF) combined with anterior cervical decompression and fusion (ACDF) can be used to treat multilevel cervical spondylotic myelopathy and radiculopathy; however, the radiological outcomes and effectiveness of this hybrid procedure are unknown. We retrospectively assessed 22 consecutive patients treated with combined TVF and ACDF between January 2007 and May 2016. The Japanese Orthopedic Association (JOA) score and Odom's criteria were analyzed. Radiological assessment included the C2-7 sagittal Cobb angle (CA) and range of motion (ROM)...
March 15, 2018: Neurologia Medico-chirurgica
https://www.readbyqxmd.com/read/29401181/retinal-nerve-fiber-layer-protrusion-associated-with-tilted-optic-discs
#18
Jaclyn Chiang, Michael Yapp, Angelica Ly, Michael P Hennessy, Michael Kalloniatis, Barbara Zangerl
SIGNIFICANCE: This study resulted in the identification of an optic nerve head (ONH) feature associated with tilted optic discs, which might potentially contribute to ONH pathologies. Knowledge of such findings will enhance clinical insights and drive future opportunities to understand disease processes related to tilted optic discs. PURPOSE: The aim of this study was to identify novel retinal nerve fiber layer (RNFL) anomalies by evaluating tilted optic discs using optical coherence tomography...
March 2018: Optometry and Vision Science: Official Publication of the American Academy of Optometry
https://www.readbyqxmd.com/read/29390994/characteristics-of-cervical-sagittal-parameters-in-healthy-cervical-spine-adults-and-patients-with-cervical-disc-degeneration
#19
Rong Xing, Wangmi Liu, Xilei Li, Libo Jiang, Mumingjiang Yishakea, Jian Dong
BACKGROUND: The cervical sagittal parameters of the normal population and the impact of disc degeneration on cervical sagittal alignment have not been clearly defined yet. This study is applied to investigate the characteristics and relationships of cervical sagittal parameters in normal adults and patients with cervical disc degeneration. METHODS: We reviewed 50 normal control subjects (normal group, NG) and 50 patients with cervical disc degeneration (degeneration group, DG), who had both cervical MRI and radiographs obtained together, between January 2010 and September 2015...
February 2, 2018: BMC Musculoskeletal Disorders
https://www.readbyqxmd.com/read/29369230/longitudinal-changes-in-disc-and-retinal-lesions-among-highly-myopic-adolescents-in-singapore-over-a-10-year-period
#20
Yee-Ling Wong, Yang Ding, Charumathi Sabanayagam, Chee-Wai Wong, Pavan Verkicharla, Kyoko Ohno-Matsui, Donald Tan, Anna Chwee-Hong Yeo, Quan V Hoang, Ecosse Lamoureux, Seang-Mei Saw
OBJECTIVES: To examine the progression pattern of disc and retinal lesions in highly myopic Chinese adolescents over a 10-year period in Singapore. METHODS: This longitudinal study included Chinese participants who showed high myopia (spherical equivalent [SE] worse than or equal to -5 diopters [D]), no history of refractive surgery, and available fundus photographs at both 2006 (baseline) and 2016 (10-year follow-up) visits. Forty-four adolescents (aged 12-16 years at baseline) who were re-examined later at follow-up were included...
January 22, 2018: Eye & Contact Lens
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