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https://www.readbyqxmd.com/read/29241397/static-characteristics-of-a-new-three-dimensional-linear-homeomorphic-saccade-model
#1
Wei Zhou, Xiu Zhai, Alireza Ghahari, G Alex Korentis, David Kaputa, John D Enderle
A linear homeomorphic saccade model that produces 3D saccadic eye movements consistent with physiological and anatomical evidence is introduced. Central to the model is the implementation of a time-optimal controller with six linear muscles and pulleys that represent the saccade oculomotor plant. Each muscle is modeled as a parallel combination of viscosity [Formula: see text] and series elasticity [Formula: see text] connected to the parallel combination of active-state tension generator [Formula: see text], viscosity element [Formula: see text], and length tension elastic element [Formula: see text]...
October 20, 2017: International Journal of Neural Systems
https://www.readbyqxmd.com/read/29239993/hypoxia-during-resistance-exercise-does-not-affect-physical-performance-perceptual-responses-or-neuromuscular-recovery
#2
Brendan R Scott, Katie M Slattery, Dean V Sculley, Ben J Dascombe
This study aimed to determine whether performing resistance exercise in hypoxia affects markers of physical performance, perceptual responses, and neuromuscular function. Fourteen male subjects (age: 24.6 ± 2.7 yr; height: 179.7 ± 5.9 cm; body mass: 84.6 ± 11.6 kg) with >2 years resistance training experience performed moderate-load resistance exercise in two conditions; normoxia (FIO2 = 0.21) and hypoxia (FIO2 = 0.16). Resistance exercise comprised 3 sets of 10 repetitions of back squats and deadlifts at 60% of 1RM, with 60s inter-set rest...
December 11, 2017: Journal of Strength and Conditioning Research
https://www.readbyqxmd.com/read/29234284/the-efficacy-of-wrestling-style-compression-suits-to-improve-maximum-isometric-force-and-movement-velocity-in-well-trained-male-rugby-athletes
#3
Daniel T McMaster, Christopher M Beaven, Brad Mayo, Nicholas Gill, Kim Hébert-Losier
Purpose: The prevalence of compression garment (CG) use is increasing with athletes striving to take advantage of the purported benefits to recovery and performance. Here, we investigated the effect of CG on muscle force and movement velocity performance in athletes. Methods: Ten well-trained male rugby athletes wore a wrestling-style CG suit applying 13-31 mmHg of compressive pressure during a training circuit in a repeated-measures crossover design. Force and velocity data were collected during a 5-s isometric mid-thigh pull (IMTP) and repeated countermovement jump (CMJ), respectively; and time to complete a 5-m horizontal loaded sled push was also measured...
2017: Frontiers in Physiology
https://www.readbyqxmd.com/read/29231509/-summary-of-professor-yang-jun-s-experience-for-intractable-facial-paralysis
#4
Tao Wang, Zaiyuan Li, Tingqiu Ge, Man Zhang, Aihong Yuan, Jun Yang
Professor YANG Jun's experience of diagnosis and treatment for intractable facial paralysis is introduced. Professor YANG focuses on the thinking model that combines TCM, western medicine and acupuncture, and adopts the differentiation system that combines disease differentiation, syndrome differentiation and meridian differentiation; he adopts the treatment integrates etiological treatment, overall regulation, symptomatic treatment as well as acupuncture, moxibustion, medication and flash cupping. The acupoints of yangming meridians are mostly selected, and acupoints of governor vessel such as Dazhui (GV 14) and Jinsuo (GV 8) are highly valued...
June 12, 2017: Zhongguo Zhen Jiu, Chinese Acupuncture & Moxibustion
https://www.readbyqxmd.com/read/29215200/mir-424-5p-reduces-ribosomal-rna-and-protein-synthesis-in-muscle-wasting
#5
Martin Connolly, Richard Paul, Roser Farre-Garros, Samantha A Natanek, Susannah Bloch, Jen Lee, Jose P Lorenzo, Harnish Patel, Cyrus Cooper, Avan A Sayer, Stephen J Wort, Mark Griffiths, Michael I Polkey, Paul R Kemp
BACKGROUND: A loss of muscle mass occurs as a consequence of a range of chronic and acute diseases as well as in older age. This wasting results from an imbalance of protein synthesis and degradation with a reduction in synthesis and resistance to anabolic stimulation often reported features. Ribosomes are required for protein synthesis, so changes in the control of ribosome synthesis are potential contributors to muscle wasting. MicroRNAs (miRNAs) are known regulators of muscle phenotype and have been shown to modulate components of the protein synthetic pathway...
December 7, 2017: Journal of Cachexia, Sarcopenia and Muscle
https://www.readbyqxmd.com/read/29214336/the-efficacy-and-safety-of-early-postoperative-botulinum-toxin-a-injection-for-facial-scars
#6
Seo H Lee, Hyung J Min, Yang W Kim, Young W Cheon
BACKGROUND: Scars widen when the underlying musculature pulls apart suture lines, and scars oriented against relaxed skin tension lines are especially susceptible to these distraction forces. Because botulinum toxin A (BTA) induces complete muscle paralysis, the purpose of the current study was to evaluate the effects of BTA using both observer-dependent qualitative assessments and quantitative measurements to verify its beneficial effects on facial scarring. METHODS: Patients with vertical forehead lacerations, treated by primary closure, were randomly assigned to two groups: one (n = 15) received BTA injections within 5 days of primary closure and the other (n = 15) received no further treatment...
December 6, 2017: Aesthetic Plastic Surgery
https://www.readbyqxmd.com/read/29212845/crawling-without-wiggling-muscular-mechanisms-and-kinematics-of-rectilinear-locomotion-in-boa-constrictors
#7
Steven J Newman, Bruce C Jayne
A central issue for understanding locomotion of vertebrates is how muscle activity and movements of their segmented axial structures are coordinated, and snakes have a longitudinal uniformity of body segments and diverse locomotor behaviors that are well suited for studying the neural control of rhythmic axial movements. Unlike all other major modes of snake locomotion, rectilinear locomotion does not involve axial bending, and the mechanisms of propulsion and modulating speed are not well understood. We integrated electromyograms and kinematics of boa constrictors to test Lissmann's decades-old hypotheses of activity of the costocutaneous superior (CCS) and inferior (CCI) muscles and the intrinsic cutaneous interscutalis (IS) muscle during rectilinear locomotion...
December 6, 2017: Journal of Experimental Biology
https://www.readbyqxmd.com/read/29202983/influence-of-tibialis-posterior-muscle-activation-on-foot-anatomy-under-axial-loading-a-biomechanical-ct-human-cadaveric-study
#8
Koen Dullaert, Jennifer E Hagen, Paul Simons, Florian Gras, Boyko Gueorguiev, R Geoff Richards, Kajetan Klos
BACKGROUND: Collapse of the medial longitudinal arch and subluxation of the subtalar joint are common occurrences in adult flatfoot deformity. Controversy exists about the role of the tibialis posterior (TP) tendon as first and/or essential lesion. Subtle changes in the foot configuration can occur under weight bearing. PURPOSE: This human cadaveric study is designed to investigate the effect that isolated actuation of the TP tendon has on the medial longitudinal arch and the hindfoot configuration under simulated weight bearing...
December 2017: Foot and Ankle Surgery: Official Journal of the European Society of Foot and Ankle Surgeons
https://www.readbyqxmd.com/read/29200094/characteristics-of-a-national-level-female-weightlifter-peaking-for-competition-a-case-study
#9
Caleb D Bazyler, Satoshi Mizuguchi, Michael C Zourdos, Kimitake Sato, Ashley A Kavanaugh, Brad H DeWeese, Kevin F Breuel, Michael H Stone
This study investigated physiological and performance changes of a national level 69kg female weightlifter following three competition phases over a 28-week training period. The athlete first trained for a regional championship (weeks 1-12), followed by a local competition (weeks 13-23) and the national championship (weeks 24-28). Body mass, vastus lateralis cross-sectional area, and unloaded and loaded squat jump performance were assessed weekly during each 4-week competition phase. Serum biomarkers, and dynamic mid-thigh pulls were assessed prior to and after each competition phase...
December 1, 2017: Journal of Strength and Conditioning Research
https://www.readbyqxmd.com/read/29189578/validity-of-an-isometric-midthigh-pull-dynamometer-in-male-youth-athletes
#10
Kevin Till, Rhys Morris, Keith Stokes, Grant Trewartha, Craig Twist, Nick Dobbin, Richard Hunwicks, Ben Jones
Till, K, Morris, R, Stokes, K, Trewartha, G, Twist, C, Dobbin, N, Hunwicks, R, and Jones, B. Validity of an isometric midthigh pull dynamometer in male youth athletes. J Strength Cond Res XX(X): 000-000, 2017-The purpose of this study was to investigate the validity of an isometric midthigh pull dynamometer against a criterion measure (i.e., 1,000-Hz force platform) for assessing muscle strength in male youth athletes. Twenty-two male adolescent (age 15.3 ± 0.5 years) rugby league players performed 4 isometric midthigh pull efforts (i...
November 16, 2017: Journal of Strength and Conditioning Research
https://www.readbyqxmd.com/read/29187197/changes-in-clavicle-length-in-acute-fractures-within-3%C3%A2-weeks-a-prospective-ultrasonographic-study-of-59-patients
#11
A H Thorsmark, O M Christensen, S Torp-Pedersen, S Overgaard, L H Frich
BACKGROUND: Within traumatology a common indication for acute surgery of fractured clavicles is bone shortening over 2 cm. This indication is among but a few indications; which are recommended to be treated operatively within the very first weeks after a fracture. Theoretically clavicle fractures could become less shortened over time due to decreasing muscle pull. If this reduced shortening does indeed happen, some patients with initial bone shortening over 2 cm could perhaps be treated conservatively? However, it is unknown what happens to the length of the clavicle within the first weeks after a fracture...
November 29, 2017: BMC Musculoskeletal Disorders
https://www.readbyqxmd.com/read/29174418/responses-of-human-ankle-muscles-to-mediolateral-balance-perturbations-during-walking
#12
A L Hof, J Duysens
During walking our balance is maintained by muscle action. In part these muscle actions automatically respond to the imbalance. This paper considers responses to balance perturbations in muscles around the ankle, peroneus longus (PL), tibialis anterior (TA) and soleus (SO). It is investigated if their action is related to previously observed balance mechanisms: the 'braking reaction' and the mediolateral ankle strategy. Subjects walked on a treadmill and received pushes to the left and pulls to the right in various phases of the gait cycle...
November 22, 2017: Human Movement Science
https://www.readbyqxmd.com/read/29156062/surgical-technique-for-pulled-in-two-syndrome-three-cases-with-chronic-progressive-external-ophthalmoplegia
#13
Alexander Matthew Jones, Julia Starte, Hamish Dunn, Kate Ahmad, Kimberley Tan
The authors describe three examples of "pulled in two syndrome" (PITS) from a series of 13 patients undergoing strabismus surgery with underlying chronic progressive external ophthalmoplegia (CPEO) and illustrate techniques for recovery of the "pulled in two" extraocular muscle should the complication arise. In all cases, a rectus muscle snapped under minimal tension while held on a strabismus hook during strabismus surgery. Two patients suffered from CPEO as a result of genetic mitochondrial disease, whereas one resulted from presumed mitochondrial toxicity induced by HAART...
November 17, 2017: Journal of Pediatric Ophthalmology and Strabismus
https://www.readbyqxmd.com/read/29144584/3d-printed-anchoring-sutures-for-permanent-shaping-of-tissues
#14
Wei Wei, Yuxiao Li, Huazhe Yang, Reza Nassab, Fatemeh Shahriyari, Ali Akpek, Xiaofei Guan, Yanhui Liu, Shahrouz Taranejoo, Ali Tamayol, Yu Shrike Zhang, Ali Khademhosseini, Hae Lin Jang
Sutures are one of the most widely used devices for adhering separated tissues after injury or surgery. However, most sutures require knotting, which can create a risk of inflammation, and can act as mechanically weak points that often result in breakage and slipping. Here, an anchoring suture is presented with a design that facilitates its propagation parallel to the suturing direction, while maximizing its resistive force against the opposite direction of external force to lock its position in tissues. Different microstructures of suture anchors are systematically designed using orthogonal arrays, and selected based on shape factors associated with mechanical strength...
November 16, 2017: Macromolecular Bioscience
https://www.readbyqxmd.com/read/29113795/a-novel-rat-model-of-brachial-plexus-injury-with-nerve-root-stumps
#15
Jintao Fang, Jiantao Yang, Yi Yang, Liang Li, Bengang Qin, Wenting He, Liwei Yan, Gang Chen, Zhehui Tu, Xiaolin Liu, Liqiang Gu
BACKGROUND: The C5-C6 nerve roots are usually spared from avulsion after brachial plexus injury (BPI) and thus can be used as donors for nerve grafting. To date, there are no appropriate animal models to evaluate spared nerve root stumps. Hence, the aim of this study was to establish and evaluate a rat model with spared nerve root stumps in BPI. NEW METHOD: In rupture group, the proximal parts of C5-T1 nerve roots were held with the surrounding muscles and the distal parts were pulled by a sudden force after the brachial plexus was fully exposed, and the results were compared with those of sham group...
November 4, 2017: Journal of Neuroscience Methods
https://www.readbyqxmd.com/read/29108083/-pedicled-omentum-flaps-in-the-management-of-deep-sternal-wound-infections
#16
Nick Spindler, Christian Etz, Martin Misfeld, Christoph Josten, Michael Borger, Friedrich Wilhelm Mohr, Stefan Langer
Aim Coverage of a deep sternal wound infection with a greater omentum flap. Due to a persistent infection caused by an infected aortic prosthesis, the primarily performed reconstruction with a latissimus dorsi flap had to be revised, and an alternative solution had to be found. Indication A deep sternal wound infection is a rare but devastating complication following median sternotomy. If the commonly used muscle flap is not sufficient and artificial material is still present in the wound, for instant drivelines or a vascular prosthesis, the greater omentum flap is a useful option due to its immunologic capacity...
November 6, 2017: Zentralblatt Für Chirurgie
https://www.readbyqxmd.com/read/29090477/analysis-of-masticatory-muscle-coordination-during-unilateral-single-tooth-clenching-using-muscle-functional-magnetic-resonance-imaging
#17
S Yamaguchi, C Okada, Y Watanabe, M Watanabe, Y Hattori
In a previous study, we used muscle functional magnetic resonance imaging to show that the anterior movement of the occlusal point increased the activity of the superior head of the ipsilateral lateral pterygoid muscle (ipsilateral SHLP) during unilateral single-tooth clenching. The purpose of this study was to verify the hypothesis that the increased activity of the ipsilateral SHLP described above serves to antagonise the occlusal force acting on the condyle. In total, 9 healthy volunteers were requested to perform left unilateral clenching at the first molar or first premolar region for 1 minute at 20% or 40% maximum voluntary clenching force...
November 1, 2017: Journal of Oral Rehabilitation
https://www.readbyqxmd.com/read/29089111/trunk-response-and-stability-in-standing-under-sagittal-symmetric-pull-push-forces-at-different-orientations-elevations-and-magnitudes
#18
Z El Ouaaid, A Shirazi-Adl, A Plamondon
To reduce lifting and associated low back injuries, manual material handling operations often involve pulling-pushing of carts at different weights, orientations, and heights. The loads on spine and risk of injury however need to be investigated. The aim of this study was to evaluate muscle forces, spinal loads and trunk stability in pull-push tasks in sagittal-symmetric, static upright standing posture. Three hand-held load magnitudes (80, 120 and 160 N) at four elevations (0, 20, 40 and 60 cm to the L5-S1) and 24 force directions covering all pull/push orientations were considered...
October 25, 2017: Journal of Biomechanics
https://www.readbyqxmd.com/read/29081444/ca-2-calmodulin-dependent-protein-kinase-ii-%C3%AE-dependent-serine727-phosphorylation-is-required-for-tmem16a-ca-2-activated-cl-channel-regulation-in-cerebrovascular-cells
#19
Cai-Xia Lin, Xiao-Fei Lv, Feng Yuan, Xiang-Yu Li, Ming-Ming Ma, Can-Zhao Liu, Jia-Guo Zhou, Guan-Lei Wang, Yong-Yuan Guan
BACKGROUND: TMEM16A is a critical component of Ca(2+)-activated chloride channels (CaCCs) and mediates basilar arterial smooth muscle cell (BASMC) proliferation in hypertensive cerebrovascular remodeling. CaMKII is a negative regulator of CaCC, and four CaMKII isoforms (α, β, γ and δ) are expressed in vasculature; however, it is unknown which and how CaMKII isoforms affect TMEM16A-associated CaCC and BASMC proliferation.Methods and Results:Patch clamp and small interfering RNA (siRNA) knockdown of different CaMKII isoforms revealed that only CaMKIIγ inhibited native Ca(2+)-activated chloride currents (ICl...
October 28, 2017: Circulation Journal: Official Journal of the Japanese Circulation Society
https://www.readbyqxmd.com/read/29076315/retromandibular-reduction-of-medially-dislocated-condylar-process-fractures
#20
Gyu Hyeong Lee, Dong Hee Kang, Sang Ah Oh
Background: Condylar process fractures are accounting for one-third of all mandibular fractures and the distal fragment is prone to dislocate to the medial side due to the pulling of lateral pterygoid muscle. Retromandibular approaches are commonly used but the intraoperative view becomes limited in medially dislocated fracture. This study summarized the cases of retromandibular reduction for medially dislocated condylar process fractures and described our supplementary procedure to realign dislocated condylar process...
October 27, 2017: Archives of Plastic Surgery
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