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https://www.readbyqxmd.com/read/28732064/mechanisms-of-aggregation-in-an-ant-tended-treehopper-attraction-to-mutualists-is-balanced-by-conspecific-competition
#1
Manuel A Morales, Andrew G Zink
Understanding the spatial structure of populations and communities has been a dominant focus of ecological research, and spatial structure is increasingly seen as critical for understanding population dynamics. Habitat (or host) preference is a proximate mechanism that can generate aggregation or overdispersion, lending insight into the ultimate consequences of observed spatial distributions. Publilia concava is a univoltine phloem-feeding insect that forms mutualistic associations with ants, which consume honeydew and protect treehoppers from predation...
2017: PloS One
https://www.readbyqxmd.com/read/28728791/the-effects-of-achilles-tendon-compliance-on-triceps-surae-mechanics-and-energetics-in-walking
#2
Maria Isabel V Orselli, Jason R Franz, Darryl G Thelen
Achilles tendon (AT) compliance can affect the generation and transmission of triceps surae muscle forces, and thus has important biomechanical consequences for walking performance. However, the uniarticular soleus (SOL) and the biarticular (GAS) function differently during walking, with in vivo evidence suggesting that their associated fascicles and tendinous structures exhibit unique kinematics during walking. Given the strong association between muscle fiber length, velocity and force production, we conjectured that SOL and GAS mechanics and energetic behavior would respond differently to altered AT compliance...
June 29, 2017: Journal of Biomechanics
https://www.readbyqxmd.com/read/28727745/evaluation-of-tissue-displacement-and-regional-strain-in-the-achilles-tendon-using-quantitative-high-frequency-ultrasound
#3
Stijn Bogaerts, Catarina De Brito Carvalho, Lennart Scheys, Kaat Desloovere, Jan D'hooge, Frederik Maes, Paul Suetens, Koen Peers
The Achilles tendon has a unique structure-function relationship thanks to its innate hierarchical architecture in combination with the rotational anatomy of the sub-tendons from the triceps surae muscles. Previous research has provided valuable insight in global Achilles tendon mechanics, but limitations with the technique used remain. Furthermore, given the global approach evaluating muscle-tendon junction to insertion, regional differences in tendon mechanical properties might be overlooked. However, recent advancements in the field of ultrasound imaging in combination with speckle tracking have made an intratendinous evaluation possible...
2017: PloS One
https://www.readbyqxmd.com/read/28720637/intersection-syndrome-the-subtle-squeak-of-an-overused-wrist
#4
Thomas M Skinner
Patient histories that include wrist pain can be pivotal in the distinction between intersection syndrome (IS) and the more common de Quervain's tenosynovitis (DQT). Presented here is a 26-year-old pregnant woman with a history of rowing who developed left radial/dorsal wrist pain and a rubbing/squeaking sensation. Nine months of conservative DQT therapy and a landmark-guided corticosteroid injection failed to relieve her symptoms. An in-clinic ultrasound showed tenosynovitis at the intersection of the first and second compartments, confirming a diagnosis of IS...
July 2017: Journal of the American Board of Family Medicine: JABFM
https://www.readbyqxmd.com/read/28717617/conservative-treatment-for-insertional-achilles-tendinopathy-platelet-rich-plasma-and-focused-shock-waves-a-retrospective-study
#5
Davide Erroi, Matilde Sigona, Tania Suarez, Donatella Trischitta, Antonio Pavan, Maria Chiara Vulpiani, Mario Vetrano
BACKGROUND: Insertional Achilles tendinopathy (IAT) represents a serious challenge for both physiatrists and surgeons. Here we analyse the results obtained by two conservative treatments [platelet-rich plasma (PRP) injections and focused extracorporeal shock-wave therapy (ESWT)] in physically active patients with IAT. METHODS: During two consecutive periods, 45 consecutive patients with IAT were treated with 3 sessions of ESWT (2400 impulses at 0.17-0.25 mJ/mm(2) per session) (24 cases between September 2011 and July 2013) or with 2 autologous PRP injections over two weeks (21 cases between September 2013 and July 2015)...
January 2017: Muscles, Ligaments and Tendons Journal
https://www.readbyqxmd.com/read/28717616/topical-polidocanol-application-in-combination-with-static-stretching-in-tendinopathies-a-prospective-pilot-study
#6
Matthias Gatz, Simone Schrading, Timm Dirrichs, Marcel Betsch, Markus Tingart, Björn Rath, Christiane Kuhl, Valentin Quack
BACKGROUND: Highly operator-based injection therapy with vasosclerosing and anesthetic polidocanol is used for tendinopathies. This pilot-study evaluates the topical application of polidocanol gel. METHODS: Prospective case series. 39 patients with tendinopathies (14 Achilles, 14 patella, 11 wrist extensors) with a symptom duration > 6 months were included. Polidocanol and static stretching were the therapy in the first 2 weeks, while static stretching was continuously performed for 6 months...
January 2017: Muscles, Ligaments and Tendons Journal
https://www.readbyqxmd.com/read/28717615/outcomes-of-prolotherapy-for-intra-tendinous-achilles-tears-a-case-series
#7
Otto Chan, Ben Havard, Sarah Morton, Mel Pritchard, Nicola Maffulli, Tom Crisp, Nat Padhiar, Jeremy David Perry, John King, Dylan Morrissey
BACKGROUND: The intra-tendinous tear is a new pathology that is defined as a discontinuity of fibres situated entirely within the tendon. Prolotherapy involves injecting an irritant, such as hyperosmolar dextrose, to stimulate a tissue healing response and ultimately reduce pain. METHODS: 43 consecutive patients diagnosed with an intra-tendinous tear were included (27 males: 16 females, mean (SD) age 41 (11.3). Patients were injected with 0.4ml-1.5ml (mean 0.8ml) of 50% dextrose and 0...
January 2017: Muscles, Ligaments and Tendons Journal
https://www.readbyqxmd.com/read/28717613/morphometric-evaluation-of-human-tendocalcaneus-a-cadaveric-study-of-south-indian-male-population
#8
Naveen Kumar, Ashwini P Aithal, Satheesha B Nayak, Jyothsna Patil, Abhinitha Padavinangadi, Biswa Bina Ray
INTRODUCTION: Tendocalcaneus or Achilles tendon is formed by the fusion of the tendons of gastrocnemius and soleus muscles. Normal morphometric measurements of tendo-calcaneus serves an important landmark in its anthropometric evaluation and biomechanical characteristics. Hence the objective of this study was to provide detailed morphometric profile of tendocalcaneus in south indian cadaveric male population. MATERIALS AND METHOD: A total of 64 dissected adult limbs was studied...
January 2017: Muscles, Ligaments and Tendons Journal
https://www.readbyqxmd.com/read/28717612/intratendinous-tears-of-the-achilles-tendon-a-new-pathology-analysis-of-a-large-4-year-cohort
#9
Otto Chan, Sarah Morton, Mel Pritchard, Tina Parkes, Peter Malliaras, Tom Crisp, Nat Padhiar, Nicola Maffulli, John King, Dylan Morrissey
BACKGROUND: Achillodynia is common and includes Achilles tendinopathy, partial Achilles tears and Achilles tendon ruptures. However, we believe an additional pathology should be considered for Achillodynia differentials - the intratendinous tear (ITT). METHODS: Examinations of 740 achillodynic patients in one specialist centre were reviewed. ITTs were defined as a clearly visualised echopoor area situated centrally and extending to, but not through the tendon periphery, with pain on palpation and no clinical findings consistent with Achilles rupture...
January 2017: Muscles, Ligaments and Tendons Journal
https://www.readbyqxmd.com/read/28712083/predictive-statistical-modelling-of-cadmium-content-in-durum-wheat-grain-based-on-soil-parameters
#10
Yoann Viala, Julien Laurette, Laurence Denaix, Emmanuelle Gourdain, Benoit Méléard, Christophe Nguyen, André Schneider, Valérie Sappin-Didier
Regulatory limits on cadmium (Cd) content in food products are tending to become stricter, especially in cereals, which are a major contributor to dietary intake of Cd by humans. This is of particular importance for durum wheat, which accumulates more Cd than bread wheat. The contamination of durum wheat grain by Cd depends not only on the genotype but also to a large extent on soil Cd availability. Assessing the phytoavailability of Cd for durum wheat is thus crucial, and appropriate methods are required. For this purpose, we propose a statistical model to predict Cd accumulation in durum wheat grain based on soil geochemical properties related to Cd availability in French agricultural soils with low Cd contents and neutral to alkaline pH (soils commonly used to grow durum wheat)...
July 15, 2017: Environmental Science and Pollution Research International
https://www.readbyqxmd.com/read/28708705/ultrasound-guidance-does-not-improve-the-results-of-shock-wave-for-plantar-fasciitis-or-calcific-achilles-tendinopathy-a-randomized-control-trial
#11
Masiiwa M Njawaya, Bassam Moses, David Martens, Jessica J Orchard, Tim Driscoll, John Negrine, John W Orchard
OBJECTIVE: To establish whether the use of ultrasound to direct shock waves to the area of greater calcification in calcaneal enthesopathies was more effective than the common procedure of directing shock waves to the point where the patient has the most tenderness. DESIGN: Two-armed nonblinded randomized control trial with allocation concealment. SETTING: The Sports Clinic at Sydney University. PATIENTS: Participants 18 years or older with symptomatic plantar fasciitis (PF) (with heel spur) or calcific Achilles tendinopathy (CAT)...
July 11, 2017: Clinical Journal of Sport Medicine: Official Journal of the Canadian Academy of Sport Medicine
https://www.readbyqxmd.com/read/28708327/sonography-of-non-neoplastic-disorders-of-the-hand-and-wrist-tendons
#12
REVIEW
Salvatore Gitto, Anna Guja Draghi, Ferdinando Draghi
Tendon disorders commonly cause hand and wrist disability and curtail the performance of work-related duties or routine tasks. Imaging is often needed for diagnosis, but it requires knowledge of the complex anatomic structures of the tendons of the hand and wrist as well as familiarity with related disorders. This review article aims to provide medical professionals with guidelines for the sonographic assessment of the tendons of hand and wrist and related disorders. Sonographic features of tendon disorders affecting the hand and wrist are described here, specifically: infectious tenosynovitis; tendon rupture or tearing; stenosing forms of tenosynovitis such as De Quervain disease and trigger finger; intersection syndrome; insertional tendinopathy; several forms of tendinous instability such as extensor carpi ulnaris instability, climber finger, and boxer knuckle; and tendinopathy in inflammatory rheumatic diseases...
July 14, 2017: Journal of Ultrasound in Medicine: Official Journal of the American Institute of Ultrasound in Medicine
https://www.readbyqxmd.com/read/28707046/understanding-the-post-surgical-bariatric-experiences-of-patients-two-or-more-years-after-surgery
#13
Rebecca H Liu, Jennifer D Irwin
BACKGROUND: In Canada, one year after bariatric surgery follow-up appointments become less frequent and surgical recipients must cope with weight management more independently. Up to 50% of patients experience weight regain by two years post-surgery. Understanding the lived experiences of those who have gone through the bariatric process may shed light on what is needed to support others moving forward. Therefore, the purpose of the study was to gain an understanding of the physical, psychological, social, and clinic-related experiences of individuals who have undergone bariatric surgery at least two years prior...
July 13, 2017: Quality of Life Research
https://www.readbyqxmd.com/read/28704487/assessment-of-peak-oxygen-uptake-during-handcycling-test-retest-reliability-and-comparison-of-a-ramp-incremented-and-perceptually-regulated-exercise-test
#14
Michael J Hutchinson, Thomas A W Paulson, Roger Eston, Victoria L Goosey-Tolfrey
PURPOSE: To examine the reliability of a perceptually-regulated maximal exercise test (PRETmax) to measure peak oxygen uptake ([Formula: see text]) during handcycle exercise and to compare peak responses to those derived from a ramp-incremented protocol (RAMP). METHODS: Twenty recreationally active individuals (14 male, 6 female) completed four trials across a 2-week period, using a randomised, counterbalanced design. Participants completed two RAMP protocols (20 W·min-1) in week 1, followed by two PRETmax in week 2, or vice versa...
2017: PloS One
https://www.readbyqxmd.com/read/28704344/effects-of-altering-trunk-position-during-landings-on-patellar-tendon-force-and-pain
#15
Rodrigo Scattone Silva, Craig R Purdam, Angela M Fearon, Wayne A Spratford, Claire Kenneally-Dabrowski, Peter Preston, Fábio V Serrão, James E Gaida
PURPOSE: To verify the immediate effects of altering sagittal plane trunk position during jump-landings on lower limb biomechanics, patellar tendon force and pain of athletes with and without patellar tendinopathy. METHODS: Twenty-one elite male athletes were categorized into 3 groups, athletes with patellar tendinopathy (TG, n=7), asymptomatic athletes with patellar tendon abnormalities (AG, n=7) and asymptomatic athletes without tendon abnormalities (CG, n=7)...
July 12, 2017: Medicine and Science in Sports and Exercise
https://www.readbyqxmd.com/read/28702876/cardiovascular-histopathology-of-a-11-year-old-with-mucopolysaccharidosis-vii-demonstrates-fibrosis-macrophage-infiltration-and-arterial-luminal-stenosis
#16
Valerie Lew, Louis Pena, Robert Edwards, Raymond Y Wang
Mucopolysaccharidosis type VII (MPS VII) is caused by β-glucuronidase deficiency, resulting in lysosomal accumulation of glycosaminoglycans (GAGs) and multisystemic disease. We present cardiovascular gross and histopathology findings from a 11-year-old MPS VII male, who expired after developing ventricular fibrillation following anesthesia induction. Gross anatomic observations were made at autopsy; postmortem formalin-fixed paraffin-embedded samples of the carotid artery, aorta, myocardium, and valves were sectioned and stained with hematoxylin-eosin, Verhoeff-Van Gieson, CD68, and trichrome stains...
July 13, 2017: JIMD Reports
https://www.readbyqxmd.com/read/28698601/characteristics-of-sonography-in-a-rat-achilles-tendinopathy-model-possible-non-invasive-predictors-of-biomechanics
#17
Su-Ya Lee, Hsiao-Feng Chieh, Chien-Ju Lin, I-Ming Jou, Yung-Nien Sun, Li-Chieh Kuo, Po-Ting Wu, Fong-Chin Su
The purpose of this study was to investigate the dynamic changes of histopathology, biomechanical properties, echo intensity, and ultrasound features in a collagenase-induced tendinopathy model of rat Achilles tendons, and to examine the associations among biomechanical properties, echo intensity, and ultrasound features. Forty-two rats received an ultrasound-guided collagenase injection on their left Achilles tendons, and needle puncture on the right ones as the control. At four, eight, and twelve weeks post-injury, the tendons were examined via measurements of their biomechanical properties, histopathological and ultrasonographic characteristics...
July 11, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28698221/patellar-and-achilles-tendinopathies-are-predominantly-peripheral-pain-states-a-blinded-case-control-study-of-somatosensory-and-psychological-profiles
#18
Melanie L Plinsinga, Cornelis P van Wilgen, Michel S Brink, Viana Vuvan, Aoife Stephenson, Luke J Heales, Rebecca Mellor, Brooke K Coombes, Bill T Vicenzino
STUDY DESIGN: Case-control design. BACKGROUND: Tendinopathy is characterised by pain on tendon loading. In persistent cases of upper limb tendinopathy, it is frequently associated with central nervous system sensitisation, whereas less commonly linked in the case of persistent lower limb tendinopathies. OBJECTIVES: Compare somatosensory and psychological profiles of participants with persistent patellar (PT) and Achilles tendinopathies (AT) with pain-free controls...
July 11, 2017: British Journal of Sports Medicine
https://www.readbyqxmd.com/read/28697880/comparison-of-autologous-bone-marrow-and-adipose-tissue-derived-mesenchymal-stem-cells-and-platelet-rich-plasma-for-treating-surgically-induced-lesions-of-the-equine-superficial-digital-flexor-tendon
#19
A Romero, L Barrachina, B Ranera, A R Remacha, B Moreno, I de Blas, A Sanz, F J Vázquez, A Vitoria, C Junquera, P Zaragoza, C Rodellar
Several therapies have been investigated for equine tendinopathies, but satisfactory long term results have not been achieved consistently and a better understanding of the healing mechanism elicited by regenerative therapies is needed. The aim of this study was to assess the separate effects of autologous bone marrow (BM) and adipose tissue (AT) derived mesenchymal stem cells (MSCs), and platelet rich plasma (PRP), for treating lesions induced in the superficial digital flexor tendon (SDFT) of horses. Lesions were created surgically in both SDFTs of the forelimbs of 12 horses and were treated with BM-MSCs (six tendons), AT-MSCs (six tendons) or PRP (six tendons)...
June 2017: Veterinary Journal
https://www.readbyqxmd.com/read/28694858/local-application-of-vibration-in-motor-rehabilitation-scientific-and-practical-considerations
#20
Daniela Poenaru, Delia Cinteza, Irina Petrusca, Liliana Cioc, Dan Dumitrascu
Vibration stimulates specific receptors, cutaneous and musculo-tendinous. The aff erent impulses travel through spinal neurons to thalamus and cortical structures. The local muscular response to a vibration is a tonic vibratory refl ex. This refl ex depends on many factors: frequency, amplitude, and tendon and muscle length. Based upon this refl ex, vibration produced alteration of isometric and isotonic contraction, fl exibility, spasticity. Many studies investigated facilitator eff ects on movement in stroke patients and spinal cord injuries...
September 2016: Mædica
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