Presse médicale
Il y a 1 mois
Analysis neuromuscular activity during front crawl with and without a snorkel

Publication date: Available online 18 March 2017
Source:Science & Sports
Author(s): C.-L. Romualdo, C.-V. Antonio Ignacio
ObjectiveThe aim of this study was to analyze and compare changes in muscle activation neck-shoulder muscles in healthy participants during front-crawl with and without a snorkel for the prevention or/and treatment of musculoskeletal injuries future.Methods and subjectsWe examined eight muscles of the shoulder and cervical spine with surface electromyography including cervical erector spinae, trapezius, supraspinatus, infraspinatus, pectoralis, anterior deltoid, middle deltoid and latissimus dorsi of the right shoulder of 16 participants (8 men and 8 women). Each subject was measured 5 complete cycles of front crawl (semi-tethered swimming) with/without snorkel with a speed of 40 beats per minute it marked for a metronome. Previously, carried out (land-based) test maximum voluntary contraction was used to normalize, in relative terms, the percentage of activation in swimming.ResultsThe results showed that front crawl with snorkel leads to the cervical erector spinae increasing activity of 22% (P=0.020) when compared to front crawl without snorkel. Other muscles do not show statistically significant changes.ConclusionsThe use of the snorkel leads to an increase in the activity of the cervical erector spinae in front cra[...]

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Presse médicale
Il y a 1 heures
ScienceDirect

Publication date: Available online 22 April 2017
Source:Morphologie
Author(s): J. Mao, Y. Wang, E. Philippe, T. Cianciulli, I. Vesely, D. How, J.-M. Bourget, L. Germain, Z. Zhang, R. Guidoin
IntroductionCross-linking and anti-calcification of prosthetic heart valves have been continuously improved to prevent degeneration and calcification. However, non-calcific structural deteriorations such as cuspal dehiscences along the stent still require further analysis.Material and methodBased upon the previous analysis of an explanted valve after 7 years, a fresh commercial aortic valve was embedded in poly(methyl methacrylate) (PMMA) and cut into slices to ensure the detailed observation of the assembly and material structures. A pericardial patch embossed to provide the adequate shape of the cusps was investigated after paraffin embedding and appropriate staining. The microstructural damages that occurred during manufacturing process were identified and evaluated by light microscopy, polarized microscopy, scanning electron microscopy (SEM) and transmission electron microscopy (TEM).ResultsThe wavy collagen bundles, the key structure of the pericardium patch, were damaged to a great extent at suture sites along the stent and in the compressed areas around the stent post. The fixation of the embossed pericardium patch along the plots of the stent aggravated the microstructural modifications. The damages mainly appeared as the elimination of collagen bundle waviness and delamination between the bundles.ConclusionConsidering [...]

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Amazon medecine
Le meilleur médicament, c'est vous !
Frédéric Saldmann
(363)

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Presse médicale
Guy Thomas
Il y a 3 heures
What\'s Up Doc - Toute l\'actualité

Guy Thomas est PU-PH en psychiatrie à l’hôpital Saint-Antoine et directeur adjoint de l'unité Inserm-UPMC 1136.

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News Santé | Actualités & informations - Yahoo Actualités FR

Ah l'humilité... Je croyais en être bourrée... Et pourtant je perçois déjà mes limites. Ou comment j'ai du mal a raconter, que bientôt, j'exercerai un job peu valorisé. Pas facile. Pas facile de sortir de mes représentations sociales bien encrées et d'assumer. Oui après avoir été cadre dans une société, je vais exercer le métier d'aide a domicile... L'écart est grand, professionnellement parlant... Mais je ne compte pas laisser le regard des autres me faire changer d'[...]

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Amazon medecine
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Frédéric Saldmann
(363)

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APF ICM

Bibliographie : Parents handis, pas à pas, du désir d'enfant à son entrée en maternelle.

2e édition, janvier 2017, 52 pages.

Le blog : http://parentsh.blogs.apf.asso.fr.