Letteratura scientifica selezionata sul tema "Muscle contraction"

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Articoli di riviste sul tema "Muscle contraction"

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Conley, Kevin E., and Stan L. Lindstedt. "Energy-saving mechanisms in muscle: the minimization strategy." Journal of Experimental Biology 205, no. 15 (2002): 2175–81. http://dx.doi.org/10.1242/jeb.205.15.2175.

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SUMMARYMany mechanisms reduce the cost of muscle activity. Here, we describe a set of specializations that reduce the cost of contraction in the high-frequency twitches that are used by a wide variety of animals for either sound production or flight. Minimizing the cost of these contractions means that cellular ATP production can meet ATP demand and sustain the high contractile rate. Two classes of specialization are found that minimize the contractile cost. The first class reduces the muscle work required per contraction. Light appendages such as rattles, insect limbs and membranous wings tha
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Hogan, Michael C., Erica Ingham, and S. Sadi Kurdak. "Contraction duration affects metabolic energy cost and fatigue in skeletal muscle." American Journal of Physiology-Endocrinology and Metabolism 274, no. 3 (1998): E397—E402. http://dx.doi.org/10.1152/ajpendo.1998.274.3.e397.

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It has been suggested that during a skeletal muscle contraction the metabolic energy cost at the onset may be greater than the energy cost related to holding steady-state force. The purpose of the present study was to investigate the effect of contraction duration on the metabolic energy cost and fatigue process in fully perfused contracting muscle in situ. Canine gastrocnemius muscle ( n = 6) was isolated, and two contractile periods (3 min of isometric, tetanic contractions with 45-min rest between) were conducted by each muscle in a balanced order design. The two contractile periods had sti
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Thomas, G. D., J. Hansen, and R. G. Victor. "Inhibition of alpha 2-adrenergic vasoconstriction during contraction of glycolytic, not oxidative, rat hindlimb muscle." American Journal of Physiology-Heart and Circulatory Physiology 266, no. 3 (1994): H920—H929. http://dx.doi.org/10.1152/ajpheart.1994.266.3.h920.

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Previous studies have produced conflicting evidence as to whether sympathetic vasoconstriction is impaired in active skeletal muscle. Because alpha 2-, not alpha 1-, adrenergic vasoconstriction is attenuated by mild acidosis, we hypothesized that alpha 2-mediated sympathetic vasoconstriction would be attenuated in contracting glycolytic muscle, which produces more acidosis than oxidative muscle. We compared effects of lumbar sympathetic nerve stimulation and alpha-adrenergic agonists on arterial pressure, femoral blood flow, and force output during contractions of oxidative or glycolytic muscl
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Todd, Gabrielle, Janet L. Taylor, Jane E. Butler, Peter G. Martin, Robert B. Gorman, and Simon C. Gandevia. "Use of motor cortex stimulation to measure simultaneously the changes in dynamic muscle properties and voluntary activation in human muscles." Journal of Applied Physiology 102, no. 5 (2007): 1756–66. http://dx.doi.org/10.1152/japplphysiol.00962.2006.

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Force responses to transcranial magnetic stimulation of motor cortex (TMS) during exercise provide information about voluntary activation and contractile properties of the muscle. Here, TMS-generated twitches and muscle relaxation during the TMS-evoked silent period were measured in fresh, heated, and fatigued muscle. Subjects performed isometric contractions of elbow flexors in two studies. Torque and EMG were recorded from elbow flexor and extensor muscles. One study ( n = 6) measured muscle contraction times and relaxation rates during brief maximal and submaximal contractions in fresh and
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Günther, Michael, Oliver Röhrle, Daniel F. B. Haeufle, and Syn Schmitt. "Spreading out Muscle Mass within a Hill-Type Model: A Computer Simulation Study." Computational and Mathematical Methods in Medicine 2012 (2012): 1–13. http://dx.doi.org/10.1155/2012/848630.

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It is state of the art that muscle contraction dynamics is adequately described by a hyperbolic relation between muscle force and contraction velocity (Hill relation), thereby neglecting muscle internal mass inertia (first-order dynamics). Accordingly, the vast majority of modelling approaches also neglect muscle internal inertia. Assuming that such first-order contraction dynamics yet interacts with muscle internal mass distribution, this study investigates two questions: (i) what is the time scale on which the muscle responds to a force step? (ii) How does this response scale with muscle des
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Kato, Tatsuya, Atsushi Sasaki, Hikaru Yokoyama, Matija Milosevic, and Kimitaka Nakazawa. "Effects of neuromuscular electrical stimulation and voluntary commands on the spinal reflex excitability of remote limb muscles." Experimental Brain Research 237, no. 12 (2019): 3195–205. http://dx.doi.org/10.1007/s00221-019-05660-6.

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Abstract It is well known that contracting the upper limbs can affect spinal reflexes of the lower limb muscle, via intraneuronal networks within the central nervous system. However, it remains unknown whether neuromuscular electrical stimulation (NMES), which can generate muscle contractions without central commands from the cortex, can also play a role in such inter-limb facilitation. Therefore, the objective of this study was to compare the effects of unilateral upper limb contractions using NMES and voluntary unilateral upper limb contractions on the inter-limb spinal reflex facilitation i
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Stebbins, C. L., O. A. Carretero, T. Mindroiu, and J. C. Longhurst. "Bradykinin release from contracting skeletal muscle of the cat." Journal of Applied Physiology 69, no. 4 (1990): 1225–30. http://dx.doi.org/10.1152/jappl.1990.69.4.1225.

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Results of previous studies from our laboratory suggest that bradykinin has a role in the exercise pressor reflex elicited by static muscle contraction. The purpose of this study was to quantify the release of bradykinin from contracting skeletal muscle. In 18 cats, blood samples were withdrawn directly from the venous effluent of the triceps surae muscles immediately before and after 30 s of static contraction producing peak muscle tensions of 33, 50, and 100% of maximum electrically stimulated contraction. Contractions producing muscle tensions of 50 and 100% of maximum increased muscle veno
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Hogan, Michael C., Bruno Grassi, Michele Samaja, Creed M. Stary, and L. B. Gladden. "Effect of contraction frequency on the contractile and noncontractile phases of muscle venous blood flow." Journal of Applied Physiology 95, no. 3 (2003): 1139–44. http://dx.doi.org/10.1152/japplphysiol.00226.2003.

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The purpose of this study was to test the hypothesis that increasing muscle contraction frequency, which alters the duty cycle and metabolic rate, would increase the contribution of the contractile phase to mean venous blood flow in isolated skeletal muscle during rhythmic contractions. Canine gastrocnemius muscle ( n = 5) was isolated, and 3-min stimulation periods of isometric, tetanic contractions were elicited sequentially at rates of 0.25, 0.33, and 0.5 contractions/s. The O2 uptake, tension-time integral, and mean venous blood flow increased significantly ( P < 0.05) with each contrac
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Hespel, P., and E. A. Richter. "Mechanism linking glycogen concentration and glycogenolytic rate in perfused contracting rat skeletal muscle." Biochemical Journal 284, no. 3 (1992): 777–80. http://dx.doi.org/10.1042/bj2840777.

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The influence of differences in glycogen concentration on glycogen breakdown and on phosphorylase activity was investigated in perfused contracting rat skeletal muscle. The rats were preconditioned by a combination of swimming exercise and diet (carbohydrate-free or carbohydrate-rich) in order to obtain four sub-groups of rats with varying resting muscle glycogen concentrations (range 10-60 mumol/g wet wt.). Pre-contraction muscle glycogen concentration was closely positively correlated with glycogen breakdown over 15 min of intermittent short tetanic contractions (r = 0.75; P less than 0.001;
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Herdmann, J., P. Enck, P. Zacchi-Deutschbein, and U. Ostermann. "Speed and pressure characteristics of external anal sphincter contractions." American Journal of Physiology-Gastrointestinal and Liver Physiology 269, no. 2 (1995): G225—G231. http://dx.doi.org/10.1152/ajpgi.1995.269.2.g225.

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The principle of isochronism reflects constant contraction time for varying strengths of muscle contraction. This principle was studied for the innervation of the pelvic floor in humans using motor-evoked potentials (MEPs) and evoked pressure curves (EPCs) from the external anal sphincter muscle (EAS). MEPs and EPCs were simultaneously recorded after transcranial magnetic stimulation of the motor cortex. Voluntary contractions were also studied. Contraction times of the EAS were significantly longer in voluntary contractions (mean, 237 ms) than in EPCs (mean, 90 ms). Depending on either mode o
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Tesi sul tema "Muscle contraction"

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Murtada, Sae-Il. "Smooth muscle modeling activation and contraction of contractile units in smooth muscle /." Licentiate thesis, Stockholm : Skolan för teknikvetenskap, Kungliga Tekniska högskolan, 2009. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-11349.

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Baker, Brent A. "Characterization of skeletal muscle performance and morphology following acute and chronic mechanical loading paradigms." Morgantown, W. Va. : [West Virginia University Libraries], 2007. https://eidr.wvu.edu/etd/documentdata.eTD?documentid=5325.

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Thesis (Ph. D.)--West Virginia University, 2007.<br>Title from document title page. Document formatted into pages; contains xii, 270 p. : ill. (some col.). Includes abstract. Includes bibliographical references.
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Pasquet, Benjamin. "Etude de la spécificité de la commande motrice et de sa régulation pendant différents types de contractions musculaires." Doctoral thesis, Universite Libre de Bruxelles, 2009. http://hdl.handle.net/2013/ULB-DIPOT:oai:dipot.ulb.ac.be:2013/210280.

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Le but de cette dissertation doctorale était de mieux comprendre les mécanismes de contrôle tant centraux que périphériques qui sont à l’origine de la régulation neuromusculaire lors de mouvement impliquant des contractions de type excentrique. Lors d’une première étude réalisée sur le muscle jambier antérieur, nous avons montré qu’un exercice utilisant des contractions excentriques présentait une meilleure résistance à la fatigue que lorsque des contractions concentriques étaient impliquées puisque celui-ci conduit à une moindre diminution du couple de force et de l’activité électromyographiq
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Yeung, Wai Ella, and 楊慧. "Eccentric contraction-induced injury in mammalian skeletal muscle." Thesis, The University of Hong Kong (Pokfulam, Hong Kong), 2003. http://hub.hku.hk/bib/B29750313.

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Monteiro, André Antonio. "Blood flow change in human masseter muscle elicited by voluntary isometric contraction." Stockholm : Kongl. Carolinska Medico Chirurgiska Institutet, 1990. http://catalog.hathitrust.org/api/volumes/oclc/21700760.html.

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Self, Brian P. "A control model of muscle contraction." Thesis, This resource online, 1991. http://scholar.lib.vt.edu/theses/available/etd-03022010-020135/.

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Lou, Fang. "A study of the contractile properties of vertebrate skeletal muscle with special reference to the force-velocity relationship and the cellular mechanisms of muscle fatigue /." Lund : Dept. of Pharmacology, University of Lund, 1994. http://books.google.com/books?id=zO9qAAAAMAAJ.

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Kawano, Yoji, Takeshi Yoshimura, and Kozo Kaibuchi. "Smooth muscle contraction by small GTPase Rho." Nagoya University School of Medicine, 2002. http://hdl.handle.net/2237/5374.

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Wadsworth, R. M. "Regulation of contraction of arterial smooth muscle." Thesis, University of Strathclyde, 2000. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.248764.

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Griffiths, R. H. ugh. "Modelling the Regulation of Skeletal Muscle Contraction." Thesis, University of Kent, 2009. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.499839.

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Libri sul tema "Muscle contraction"

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Bagshaw, Clive R. Muscle Contraction. Springer Netherlands, 1993. http://dx.doi.org/10.1007/978-94-015-6839-5.

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Rassier, Dilson E. Muscle biophysics: From molecules to cells. Springer, 2010.

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1945-, Squire John, ed. Molecular mechanisms in muscular contraction. Macmillan, 1989.

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1945-, Squire John, ed. Molecular mechanisms in muscular contraction. Macmillan, 1990.

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Rüegg, Johann Caspar. Calcium in Muscle Contraction. Springer Berlin Heidelberg, 1992. http://dx.doi.org/10.1007/978-3-642-77560-4.

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Pollack, Gerald H. Muscles & molecules: Uncovering the principles of biological motion. Ebner & Sons Publishers, 1990.

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Muscle, Symposium (2004 Tokyo Japan). Sliding filament mechanism in muscle contraction: Fifty years of research. Springer, 2005.

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Muscle Symposium (2004 Tokyo, Japan). Sliding filament mechanism in muscle contraction: Fifty years of research. Springer, 2005.

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1945-, Squire John, ed. Molecular mechanisms in muscular contraction. CRC Press, 1990.

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1933-, Sugi Haruo, and Fujihara Kagaku Zaidan, eds. Molecular and cellular aspects of muscle contraction. Kluwer Academic/Plenum Publishers, 2003.

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Capitoli di libri sul tema "Muscle contraction"

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Bagshaw, Clive R. "Muscle cells." In Muscle Contraction. Springer Netherlands, 1993. http://dx.doi.org/10.1007/978-94-015-6839-5_3.

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Bagshaw, Clive R. "Introduction." In Muscle Contraction. Springer Netherlands, 1993. http://dx.doi.org/10.1007/978-94-015-6839-5_1.

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Bagshaw, Clive R. "Problems and prospects." In Muscle Contraction. Springer Netherlands, 1993. http://dx.doi.org/10.1007/978-94-015-6839-5_10.

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Bagshaw, Clive R. "Gross anatomy and physiology." In Muscle Contraction. Springer Netherlands, 1993. http://dx.doi.org/10.1007/978-94-015-6839-5_2.

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Bagshaw, Clive R. "Contractile proteins." In Muscle Contraction. Springer Netherlands, 1993. http://dx.doi.org/10.1007/978-94-015-6839-5_4.

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Bagshaw, Clive R. "Mechanism of ATP hydrolysis." In Muscle Contraction. Springer Netherlands, 1993. http://dx.doi.org/10.1007/978-94-015-6839-5_5.

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Bagshaw, Clive R. "Crossbridge structure and function." In Muscle Contraction. Springer Netherlands, 1993. http://dx.doi.org/10.1007/978-94-015-6839-5_6.

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Bagshaw, Clive R. "Mechanochemical coupling." In Muscle Contraction. Springer Netherlands, 1993. http://dx.doi.org/10.1007/978-94-015-6839-5_7.

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Bagshaw, Clive R. "Molecular basis of regulation." In Muscle Contraction. Springer Netherlands, 1993. http://dx.doi.org/10.1007/978-94-015-6839-5_8.

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Bagshaw, Clive R. "In vitro motility assays." In Muscle Contraction. Springer Netherlands, 1993. http://dx.doi.org/10.1007/978-94-015-6839-5_9.

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Atti di convegni sul tema "Muscle contraction"

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Zîrnă, Bianca-Alexandra, Denis Mihailovschi, and Mădălin Corneliu Frunzete. "EMG Signal Acquisition and Processing for Muscle Contraction Classification." In 2024 Signal Processing: Algorithms, Architectures, Arrangements, and Applications (SPA). IEEE, 2024. http://dx.doi.org/10.23919/spa61993.2024.10715620.

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Hülkenberg, Alfred, Niko Strotmann, Amine Mokni, Steffen Leonhardt, and Philip Von Platen. "The Influence of Muscle Contraction Intensity on Electrical Impedance Myography." In 2024 46th Annual International Conference of the IEEE Engineering in Medicine and Biology Society (EMBC). IEEE, 2024. https://doi.org/10.1109/embc53108.2024.10782074.

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Moudjari, Ines, Caroline Pautard, Clément Jouanneau, and Régine Le Bouquin Jeannés. "Identification of Pelvic Floor Muscle Contraction From Non-Invasive Sensors." In 2024 32nd European Signal Processing Conference (EUSIPCO). IEEE, 2024. http://dx.doi.org/10.23919/eusipco63174.2024.10715132.

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Arakawa, Hinata, Shoichiro Kanno, Kenta Shimba, Yoshitaka Miyamoto, and Thoru Yagi. "Improvement of the Donut-Shaped Cultured Muscle Actuator's Contraction Force." In 2024 16th Biomedical Engineering International Conference (BMEiCON). IEEE, 2024. https://doi.org/10.1109/bmeicon64021.2024.10896277.

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Chaves, Juliana N., Hani C. Yehia, and Henrique R. Martins. "Development of a portable labor-contraction monitor based on mechanomyography." In Simpósio Brasileiro de Computação Aplicada à Saúde. Sociedade Brasileira de Computação (SBC), 2022. http://dx.doi.org/10.5753/sbcas_estendido.2022.222422.

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Mechanomyography is a technique that measures the mechanical signal observed from the muscle surface during the contraction. It is expected to be a promising tool to evaluate uterine dynamics even though the uterus contraction is known to be involuntary. This study aimed to describe the development of a portable device based on mechanomyography to monitor uterine contraction. To assess the system was performed isometric contractions of the rectus femoris muscle with varying loads. The acquired data showed that the system could identify each contraction's onset, offset, and amplitude. The senso
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Milićević, Bogdan, Miloš Ivanović, Boban Stojanović, and Nenad Filipović. "HUXLEY SURROGATE MODEL FOR TWITCH MUSCLE CONTRACTION." In 1st INTERNATIONAL Conference on Chemo and BioInformatics. Institute for Information Technologies, University of Kragujevac,, 2021. http://dx.doi.org/10.46793/iccbi21.239m.

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Biophysical muscle models, often called Huxley-type models, are based on the underlying physiology of muscles, making them suitable for modeling non-uniform and unsteady contractions. This kind of model can be computationally intensive, which makes the usage of large-scale simulations difficult. To enable more efficient usage of the Huxley muscle model, we created a data-driven surrogate model, which behaves similarly to the original Huxley muscle model, but it requires significantly less computational power. From several numerical simulations, we acquired a lot of data and trained deep neural
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Palladino, Joseph L. "Modeling Mouse Soleus Muscle Contraction." In 2020 42nd Annual International Conference of the IEEE Engineering in Medicine and Biology Society (EMBC) in conjunction with the 43rd Annual Conference of the Canadian Medical and Biological Engineering Society. IEEE, 2020. http://dx.doi.org/10.1109/embc44109.2020.9176436.

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Palladino, Joseph L. "Canine Smooth Muscle Contraction Model." In 2022 44th Annual International Conference of the IEEE Engineering in Medicine & Biology Society (EMBC). IEEE, 2022. http://dx.doi.org/10.1109/embc48229.2022.9871599.

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Sandler, Reuben, and Stephen N. Robinovitch. "Impact Severity During a Fall Is Decreased by Lower Extremity Muscle Contractions During Descent." In ASME 1998 International Mechanical Engineering Congress and Exposition. American Society of Mechanical Engineers, 1998. http://dx.doi.org/10.1115/imece1998-0084.

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Abstract Falls are a major cause of injury in the elderly, including the vast majority of hip and wrist fractures, and a considerable portion of vertebral fractures. In the event of a fall, one’s risk for such an injury depends on bone strength, and the configuration and kinetic energy (KE) of the body at the instant it contacts the ground. Consideration of acts such as sitting and squatting suggests that a major determinant of KE is the amount of energy “absorbed” (or negative work performed) during the descent phase of the fall by eccentrically-contracting lower extremity muscles. In the pre
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Patel, Harshil, Gerald O’Neill, and Panagiotis Artemiadis. "Regulation of 3D Human Arm Impedance Through Muscle Co-Contraction." In ASME 2013 Dynamic Systems and Control Conference. American Society of Mechanical Engineers, 2013. http://dx.doi.org/10.1115/dscc2013-3942.

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Humans have the inherent ability of performing highly dexterous and skillful tasks with their arms, involving maintenance of posture, movement, and interaction with the environment. The latter requires the human to control the dynamic characteristics of the upper limb musculoskeletal system. These characteristics are quantitatively represented by inertia, damping, and stiffness, which are measures of mechanical impedance. Many previous studies have shown that arm posture is a dominant factor in determining the end point impedance on a horizontal (transverse) plane. This paper presents the char
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Rapporti di organizzazioni sul tema "Muscle contraction"

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Westerlind, Kim. Muscle Contraction Arrests Tumor Growth. Defense Technical Information Center, 2006. http://dx.doi.org/10.21236/ada572645.

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Jalil, Yorschua, and Ruvistay Gutierrez. Myokines secretion and their role in critically ill patients. A scoping review protocol. INPLASY - International Platform of Registered Systematic Review and Meta-analysis Protocols, 2021. http://dx.doi.org/10.37766/inplasy2021.9.0048.

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Review question / Objective: 1-How and by which means stimulated muscle from critically ill patients can liberate myokines?, 2-Which are the main characteristics of the critically ill population studied and if some of these influenced myokine´s secretion?, 5-Can myokines exert local or distant effects in critically ill patients?, 5-Which are the potential effects of myokines in critically ill patients? Eligibility criteria: Participants and context: We will include primary studies (randomized or non-randomized trials, observational studies, case series or case report) that consider hospitalize
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Comeaux, James A., James R. Jauchem, David D. Cox, Carrie C. Crane, and John A. D'Andrea. Muscle Contraction During Electro-Muscular Incapacitation: A Comparison Between Square-Wave Pulses and the Taser (registered trademark) X26 Electronic Control Device. Defense Technical Information Center, 2009. http://dx.doi.org/10.21236/ada597215.

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Holdsworth, Clark, Steven Copp, Tadakatsu Inagaki, et al. Chronic (-)-epicatechin administration does not affect contracting skeletal muscle microvascular oxygenation. Peeref, 2022. http://dx.doi.org/10.54985/peeref.2206p3750191.

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Hosseini, Jeanette M. Trinitrobenzenesulfonic Acid Colitis Induces Changes in the Contractile Response of Circular Smooth Muscle in the Distal Colon. Defense Technical Information Center, 1996. http://dx.doi.org/10.21236/ad1011516.

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Rafaeli, Ada, and Russell Jurenka. Molecular Characterization of PBAN G-protein Coupled Receptors in Moth Pest Species: Design of Antagonists. United States Department of Agriculture, 2012. http://dx.doi.org/10.32747/2012.7593390.bard.

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The proposed research was directed at determining the activation/binding domains and gene regulation of the PBAN-R’s thereby providing information for the design and screening of potential PBAN-R-blockers and to indicate possible ways of preventing the process from proceeding to its completion. Our specific aims included: (1) The identification of the PBAN-R binding domain by a combination of: (a) in silico modeling studies for identifying specific amino-acid side chains that are likely to be involved in binding PBAN with the receptor and; (b) bioassays to verify the modeling studies using mut
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Robert-Lachaine, Xavier, Hakim Mecheri, Denis Denys, and Christian Larivière. Élaboration et faisabilité d'application d'une méthode d'évaluation biomécanique de l'exposition physique lors du port d'exosquelettes en milieu de travail. IRSST, 2025. https://doi.org/10.70010/crod7506.

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Abstract (sommario):
La prévalence des troubles musculosquelettiques (TMS) liés au travail physique reste prédominante selon les données épidémiologiques. Les récentes avancées technologiques des exosquelettes représentent une opportunité pour la prévention des TMS. Des études ont montré que les exosquelettes peuvent réduire l'activité musculaire pendant des tâches spécifiques en laboratoire. Cependant, très peu d'études ont évalué les exosquelettes directement sur le lieu de travail. L'objectif est d’élaborer une méthode d’évaluation de l'efficacité des exosquelettes à réduire l'exposition physique des travailleu
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