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https://www.readbyqxmd.com/read/28231644/mid-term-outcomes-of-anterior-cruciate-ligament-reconstruction-with-far-anteromedial-portal-technique
#1
Yoon Sang Jeon, Sung Wook Choi, Ju Hyun Park, Jae Sik Yoon, Jung Sub Shin, Myung Ku Kim
Purpose: The purpose of this study was to evaluate the mid-term outcomes of anatomic anterior cruciate ligament (ACL) reconstruction using two anteromedial (AM) portals by comparing with short-term follow-up results. Materials and Methods: Fifty patients who were treated by ACL reconstruction using a two AM portal technique were evaluated retrospectively. The follow-up period was at least 5 years. The mean follow-up period was 68.5±13.9 months. The mid-term clinical outcomes were compared with short-term (≥12 months) results...
March 1, 2017: Knee Surgery & related Research
https://www.readbyqxmd.com/read/28231556/compliant-support-surfaces-affect-sensory-reweighting-during-balance-control
#2
I M Schut, D Engelhart, J H Pasma, R G K M Aarts, A C Schouten
To maintain upright posture and prevent falling, balance control involves the complex interaction between nervous, muscular and sensory systems, such as sensory reweighting. When balance is impaired, compliant foam mats are used in training methods to improve balance control. However, the effect of the compliance of these foam mats on sensory reweighting remains unclear. In this study, eleven healthy subjects maintained standing balance with their eyes open while continuous support surface (SS) rotations disturbed the proprioception of the ankles...
February 9, 2017: Gait & Posture
https://www.readbyqxmd.com/read/28231435/impact-of-a-competition-with-two-consecutive-matches-in-a-day-on-physical-performance-in-young-tennis-players
#3
Cesar Gallo-Salazar, Juan Del Coso, David Barbado, Alejandro Lopez-Valenciano, Francisco Javier Santos-Rosa, David Sanz-Rivas, Manuel Moya, Jaime Fernandez-Fernandez
The purpose of this study was to analyze the effects of playing two tennis matches on the same day on physical performance in young tennis players. Twelve well-trained young tennis players took part in a simulated tennis competition consisting of two tennis matches on the same day (morning and afternoon sessions). Before and the day after the competition, physical performance was measured using a battery of countermovement jumps (CMJ), a 10-m sprint, the 5-0-5 agility test, hip, grip and shoulder maximal isometric strength, shoulder range of motion (ROM) and a serve velocity test...
February 23, 2017: Applied Physiology, Nutrition, and Metabolism, Physiologie Appliquée, Nutrition et Métabolisme
https://www.readbyqxmd.com/read/28230622/restriction-of-cervical-intervertebral-movement-with-different-types-of-external-immobilizers-a-cadaveric-3d-analysis-study
#4
Micha Holla, Gerjon Hannink, Thomas G E Eggen, Robin A Daanen, Allard J F Hosman, Nico Verdonschot
STUDY DESIGN: Cadaveric radiostereometric analysis study. OBJECTIVE: To quantify the ability of 5 commonly used immobilizers to restrict cervical spine movement, including intervertebral movement, in three directions. SUMMARY OF BACKGROUND DATA: Evidence about the ability of many clinically used cervical immobilizers to restrict cervical movement is limited. Furthermore, their effect on intervertebral movement is unknown. METHODS: Radiographic inert beads were implanted in the cervical vertebral bodies of five fresh-frozen human cadavers...
February 22, 2017: Spine
https://www.readbyqxmd.com/read/28230569/procedure-oriented-torsional-anatomy-of-the-hand-for-spasticity-injection
#5
Joslyn John, John Cianca, Faye Chiou-Tan, Sindhu Pandit, Erin Furr-Stimming, Katherine H Taber
OBJECTIVES: To provide musculoskeletal ultrasound (MSKUS) images of hand anatomy in the position of hemiparetic flexion as a reference for spasticity injections. After a stroke, spasticity can result in anatomic distortion of the hand. Spasticity may require treatment with botulinum toxin or phenol injections. Anatomic distortion may decrease the accuracy of injections. Standard anatomic references are of limited utility because they are not in this spastic hemiparetic position. There presently is no anatomic reference in the literature for these spastic postures...
February 23, 2017: Journal of Computer Assisted Tomography
https://www.readbyqxmd.com/read/28230355/thermophoretic-tweezers-for-low-power-and-versatile-manipulation-of-biological-cells
#6
Linhan Lin, Xiaolei Peng, Xiaoling Wei, Zhangming Mao, Chong Xie, Yuebing Zheng
Optical manipulation of biological cells and nanoparticles is significantly important in life sciences, early disease diagnosis, and nanomanufacturing. However, low-power and versatile all-optical manipulation has remained elusive. Herein, we have achieved light-directed versatile thermophoretic manipulation of biological cells at an optical power 100~1000 times lower than optical tweezers. By harnessing the permittivity gradient in the electric double layer of the charged surface of the cell membrane, we succeed at the low-power trapping of suspended biological cells within a light-controlled temperature gradient field...
February 23, 2017: ACS Nano
https://www.readbyqxmd.com/read/28230348/nmr-structures-of-gcn4p-are-largely-conserved-when-ion-pairs-are-disrupted-at-acidic-ph-but-show-a-relaxation-of-the-coiled-coil-superhelix
#7
Anne R Kaplan, Megan R Brady, Mark W Maciejewski, Richard A Kammerer, Andrei T Alexandrescu
To understand the roles ion pairs play in stabilizing coiled coils we determined NMR structures of GCN4p at three pH values. At pH 6.6 all acidic residues are fully charged, at pH 4.4 they are half-charged, and at pH 1.5 they are protonated and uncharged. The α-helix monomer and coiled coil structures of GCN4p are largely conserved, except for a loosening of the coiled coil quaternary structure with decreasing pH. Differences going from neutral to acidic pH include (i) an unwinding of the coiled coil superhelix due to the loss of inter-chain ion pair contacts, (ii) a small increase in the separation of the monomers in the dimer, (iii) a loosening of knobs-into-holes packing motifs, and (iv) an increased separation between oppositely charged residues that participate in ion pairs at neutral pH...
February 23, 2017: Biochemistry
https://www.readbyqxmd.com/read/28230177/storage-of-passive-motion-pattern-in-hippocampal-ca1-region-depends-on-camkii-creb-signaling-pathway-in-a-motion-sickness-rodent-model
#8
Junqin Wang, Jiluo Liu, Leilei Pan, Ruirui Qi, Peng Liu, Wei Zhou, Yiling Cai
Sensory mismatch between actual motion information and anticipated sensory patterns (internal model) is the etiology of motion sickness (MS). Some evidence supports that hippocampus might involve the neural storage of the "internal model". This study established an "internal model" acquisition-retention behavioral model using a repeated habituation rotation training protocol. We tried to identify the hippocampal subregion involved in "internal model" retention using chemical lesion methods. Hippocampal kinases (CaMK, CaMKIV, CREB and ERK1/2) phosphorylation in the target subregion was assayed and the effects of kinase inhibitors (KN93 or U0126) on "internal model" retention were investigated...
February 23, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28230164/dynamical-majorana-edge-modes-in-a-broad-class-of-topological-mechanical-systems
#9
Emil Prodan, Kyle Dobiszewski, Alokik Kanwal, John Palmieri, Camelia Prodan
Mechanical systems can display topological characteristics similar to that of topological insulators. Here we report a large class of topological mechanical systems related to the BDI symmetry class. These are self-assembled chains of rigid bodies with an inversion centre and no reflection planes. The particle-hole symmetry characteristic to the BDI symmetry class stems from the distinct behaviour of the translational and rotational degrees of freedom under inversion. This and other generic properties led us to the remarkable conclusion that, by adjusting the gyration radius of the bodies, one can always simultaneously open a gap in the phonon spectrum, lock-in all the characteristic symmetries and generate a non-trivial topological invariant...
February 23, 2017: Nature Communications
https://www.readbyqxmd.com/read/28229516/a-direct-link-from-the-gas-to-the-condensed-phase-a-rotational-spectroscopic-study-of-2-2-2-trifluoroethanol-trimers
#10
Javix Thomas, Nathan A Seifert, Wolfgang Jäger, Yunjie Xu
Rotational spectra of the three most stable conformers (I, II, III) of the ternary 2,2,2-trifluoroethanol (TFE) cluster were measured using Fourier transform microwave spectrometers, and unambiguously assigned with the aid of ab initio calculations. The most stable conformer, I, contains one trans-TFE subunit which is unstable in its isolated gas phase form. The study offers new insights into how the trans conformation is stabilized in TFE clusters of increasing size, and eventually becomes a dominant conformation in the liquid phase...
February 23, 2017: Angewandte Chemie
https://www.readbyqxmd.com/read/28229478/students-experiences-of-role-relationships-and-learning-in-two-clerkship-models
#11
D Jill Konkin, Carol Suddards
CONTEXT: An increasing number of medical schools around the world are implementing longitudinal integrated clerkships (LICs). The University of Alberta's third-year LIC admits a small group of each class. Those not in the LIC undertake a rotation-based clerkship (RBC). All students have a fourth-year RBC. Meaningful participation in patient care and guidance have been identified as affordances for work-based learning. METHODS: This qualitative study is part of an ongoing research programme conducted in a hermeneutic phenomenological frame...
February 22, 2017: Medical Education
https://www.readbyqxmd.com/read/28229469/what-is-the-impact-of-shift-work-on-the-psychological-functioning-and-resilience-of-nurses-an-integrative-review
#12
REVIEW
Mozhdeh Tahghighi, Clare S Rees, Janie A Brown, Lauren J Breen, Desley Hegney
AIM: To synthesise existing research to determine if nurses who work shifts have poorer psychological functioning and resilience than nurses who do not work shifts. BACKGROUND: Research exploring the impact of shift work on the psychological functioning and resilience of nurses is limited compared with research investigating the impact of shifts on physical outcomes. DESIGN: Integrative literature review. DATA SOURCES: Relevant databases were searched from January 1995- August 2016 using the combination of keywords: nurse, shift work; rotating roster; night shift; resilient; hardiness; coping; well-being; burnout; mental health; occupational stress; compassion fatigue; compassion satisfaction; stress; anxiety; depression...
February 22, 2017: Journal of Advanced Nursing
https://www.readbyqxmd.com/read/28229432/spontaneous-torsion-of-the-right-upper-lung-lobe-a-case-report
#13
Yusuke Kita, Tetsuhiko Go, Kazuhito Nii, Natsumi Matsuura, Hiroyasu Yokomise
BACKGROUND: Pulmonary torsion is usually caused by thoracic surgery or trauma. Spontaneous pulmonary torsion caused by tumor and pleural effusion is very rare. CASE PRESENTATION: A 76-year-old Asian male with a chronic cough and suspected lung or pleural tumor presented with sudden dyspnea. Computed tomography showed that the right upper lung lobe contained a large tumor in the region of S1-3; the tumor had shifted to the posterior thoracic space and rotated 90° counterclockwise, potentially impeding blood flow...
December 2017: Surgical Case Reports
https://www.readbyqxmd.com/read/28229417/a-simplified-and-systematic-method-to-isolate-culture-and-characterize-multiple-types-of-human-dental-stem-cells-from-a-single-tooth
#14
Mohammed Bakkar, Younan Liu, Dongdong Fang, Camille Stegen, Xinyun Su, Murali Ramamoorthi, Li-Chieh Lin, Takako Kawasaki, Nicholas Makhoul, Huan Pham, Yoshinori Sumita, Simon D Tran
This chapter describes a simplified method that allows the systematic isolation of multiple types of dental stem cells such as dental pulp stem cells (DPSC), periodontal ligament stem cells (PDLSC), and stem cells of the apical papilla (SCAP) from a single tooth. Of specific interest is the modified laboratory approach to harvest/retrieve the dental pulp tissue by minimizing trauma to DPSC by continuous irrigation, reduction of frictional heat from the bur rotation, and reduction of the bur contact time with the dentin...
2017: Methods in Molecular Biology
https://www.readbyqxmd.com/read/28229355/femoral-shaft-osteotomy-for-obligate-outward-rotation-due-to-scfe
#15
Peter M Stevens, Lucas Anderson, Bruce A MacWilliams
Slipped capital femoral epiphysis (SCFE) is an adolescent disease that leads to retroversion of the femoral neck and shaft, relative to the head. Observing that patients with SCFE must walk with an outward foot progression angle and externally rotate the leg in order to flex the hip, we have been performing a femoral shaft rotational osteotomy wherein we rotate the lower femur 45° inward, relative to the upper femur. By correcting retroversion, our goal is to improve functional hip and knee motion, thereby mitigating the effects of SCFE impingement...
February 22, 2017: Strategies in Trauma and Limb Reconstruction
https://www.readbyqxmd.com/read/28229134/magnetic-microkayaks-propulsion-of-microrods-precessing-near-a-surface-by-kilohertz-frequency-rotating-magnetic-fields
#16
L O Mair, B A Evans, A Nacev, P Y Stepanov, R Hilaman, S Chowdhury, S Jafari, W Wang, B Shapiro, I N Weinberg
Surface-swimming nano- and micromotors hold significant potential for on-chip mixing, flow generation, sample manipulation, and microrobotics. Here we describe rotating microrods magnetized nearly orthogonally to their long axes. When actuated near a solid surface, these microrods demonstrate precessing motion, with rods describing a double cone similar to the motion of a kayaker's paddle. The precessing motion induces translation. At 1 kHz, these "microkayaks" move at translational velocities of ≈14 μm s(-1) and generate advective flows up to 10 μm s(-1)...
February 23, 2017: Nanoscale
https://www.readbyqxmd.com/read/28228928/rotating-snakes-illusion-quantitative-analysis-reveals-a-region-in-luminance-space-with-opposite-illusory-rotation
#17
Lea Atala-Gérard, Michael Bach
The Rotating Snakes Illusion employs patterns with repetitive asymmetric luminance steps forming a "snake wheel." In the underlying luminance sequence {black, dark grey, white, light grey}, coded as {0, g1, 100, g2}, we varied g1 and g2 and measured illusion strength via nulling: Saccades were performed next to a "snake wheel" that rotated physically; observers adjusted rotation until a stationary percept obtained. Observers performed the perceptual nulling of the seeming rotation reliably. Typical settings for (g1, g2), measured from images by Kitaoka, are around (20%, 60%)...
January 2017: I-Perception
https://www.readbyqxmd.com/read/28228898/disseminated-coccidioidomycosis-with-multifocal-musculoskeletal-disease-involvement
#18
Michael F McConnell, Ann Shi, Todd M Lasco, Luke Yoon
We report a rare case of disseminated coccidioidomycosis with multifocal musculoskeletal involvement. The patient presented to the emergency department with left shoulder pain and swelling. Magnetic resonance imaging of the left shoulder revealed enhancing soft tissue masses, bony lesions, and fluid collections in and around the glenohumeral joint with involvement of the proximal humerus, glenoid, and rotator cuff musculature. Multiple additional areas of involvement were subsequently discovered. Fungal cultures confirmed coccidioidomycosis infection at all surgical sites with superimposed polymicrobial bacterial infection in the left shoulder...
March 2017: Radiology case reports
https://www.readbyqxmd.com/read/28228772/responses-of-nitrogen-utilization-and-apparent-nitrogen-loss-to-different-control-measures-in-the-wheat-and-maize-rotation-system
#19
Zhengping Peng, Yanan Liu, Yingchun Li, Yahya Abawi, Yanqun Wang, Mingxin Men, Duc-Anh An-Vo
Nitrogen (N) is an essential macronutrient for plant growth and excessive application rates can decrease crop yield and increase N loss into the environment. Field experiments were carried out to understand the effects of N fertilizers on N utilization, crop yield and net income in wheat and maize rotation system of the North China Plain (NCP). Compared to farmers' N rate (FN), the yield of wheat and maize in reduction N rate by 21-24% based on FN (RN) was improved by 451 kg ha(-1), N uptakes improved by 17 kg ha(-1) and net income increased by 1671 CNY ha(-1), while apparent N loss was reduced by 156 kg ha(-1)...
2017: Frontiers in Plant Science
https://www.readbyqxmd.com/read/28228697/influence-of-posture-cuing-shirt-on-tennis-serve-kinematics-in-division-iii-tennis-players
#20
Joseph Zappala, Carolina Orrego, Emily Boe, Heather Fechner, Derek Salminen, Daniel J Cipriani
OBJECTIVE: The purpose of this study was to evaluate the influence of a posture-cuing shirt on internal rotation velocity of the shoulder during a tennis swing and to determine this influence on shoulder external rotation position. METHODS: Nine healthy competitive college tennis players from a Division III college participated in this study. High-speed motion capture allowed for 3-dimensional analysis of shoulder kinematics during a tennis serve. Two conditions were evaluated while the athletes performed a high-velocity tennis serve: a standard tennis shirt and a posture-cuing shirt...
March 2017: Journal of Chiropractic Medicine
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