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Muscle energy technique

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https://www.readbyqxmd.com/read/28503503/measurement-methods-for-physical-activity-and-energy-expenditure-a-review
#1
REVIEW
Didace Ndahimana, Eun-Kyung Kim
Physical activity is defined as any bodily movement produced by skeletal muscles that results in energy expenditure. The benefits of physical activity for health maintenance have been well documented, especially in the prevention and management of chronic diseases. Therefore, accurate measurement of physical activity and energy expenditure is essential both for epidemiological studies and in the clinical context. Given the large number of available methods, it is important to have an understanding of each, especially when one needs to choose a technique to use...
April 2017: Clinical Nutrition Research
https://www.readbyqxmd.com/read/28494371/improving-surface-emg-burst-detection-in-infrahyoid-muscles-during-swallowing-using-digital-filters-and-discrete-wavelet-analysis
#2
Sebastian Restrepo-Agudelo, Sebastian Roldan-Vasco, Lina Ramirez-Arbelaez, Santiago Cadavid-Arboleda, Estefania Perez-Giraldo, Andres Orozco-Duque
The visual inspection is a widely used method for evaluating the surface electromyographic signal (sEMG) during deglutition, a process highly dependent of the examiners expertise. It is desirable to have a less subjective and automated technique to improve the onset detection in swallowing related muscles, which have a low signal-to-noise ratio. In this work, we acquired sEMG measured in infrahyoid muscles with high baseline noise of ten healthy adults during water swallowing tasks. Two methods were applied to find the combination of cutoff frequencies that achieve the most accurate onset detection: discrete wavelet decomposition based method and fixed steps variations of low and high cutoff frequencies of a digital bandpass filter...
May 3, 2017: Journal of Electromyography and Kinesiology
https://www.readbyqxmd.com/read/28489897/analysis-of-statistical-and-standard-algorithms-for-detecting-muscle-onset-with-surface-electromyography
#3
Matthew S Tenan, Andrew J Tweedell, Courtney A Haynes
The timing of muscle activity is a commonly applied analytic method to understand how the nervous system controls movement. This study systematically evaluates six classes of standard and statistical algorithms to determine muscle onset in both experimental surface electromyography (EMG) and simulated EMG with a known onset time. Eighteen participants had EMG collected from the biceps brachii and vastus lateralis while performing a biceps curl or knee extension, respectively. Three established methods and three statistical methods for EMG onset were evaluated...
2017: PloS One
https://www.readbyqxmd.com/read/28481993/inherited-eye-related-disorders-due-to-mitochondrial-dysfunction
#4
Patrick Yu-Wai-Man, Nancy J Newman
Genetic disorders due to mitochondrial dysfunction are not uncommon and the majority of these patients will have eye-related manifestations, including visual loss from optic nerve and retinal disease, visual field loss from retrochiasmal visual pathway damage, and ptosis and ocular dysmotility from extraocular muscle involvement. Defects in both the nuclear and mitochondrial genomes cause mitochondrial dysfunction via several mechanisms, including impaired mitochondrial energy production, oxidative stress, mitochondrial DNA instability, abnormalities in the regulation of mitochondrial dynamics and mitochondrial quality control, and disturbed cellular interorganellar communication...
May 8, 2017: Human Molecular Genetics
https://www.readbyqxmd.com/read/28455271/evaluation-of-ablation-catheter-technology-comparison-between-thigh-preparation-model-and-an-in%C3%A2-vivo-beating-heart
#5
Eran Leshem, Cory M Tschabrunn, Fernando M Contreras-Valdes, Israel Zilberman, Elad Anter
BACKGROUND: An in vivo animal thigh model is the standard technique for evaluation of ablation catheter technologies, including efficacy and safety of ablation. However, the biophysics of ablation in a thigh model may not be similar to a beating heart. OBJECTIVE: The purpose of this study was to compare efficacy and safety of ablation between a thigh preparation model and a beating heart. METHODS: In 7 swine, radiofrequency ablation using a 3...
April 26, 2017: Heart Rhythm: the Official Journal of the Heart Rhythm Society
https://www.readbyqxmd.com/read/28437606/transfer-study-of-silver-nanoparticles-in-poultry-production
#6
Federica Gallocchio, Giancarlo Biancotto, Veronica Cibin, Carmen Losasso, Simone Belluco, Ruud Peters, Greet van Bemmel, Claudia Cascio, Stefan Weigel, Peter Tromp, Federica Gobbo, Salvatore Catania, Antonia Ricci
Silver nanoparticles (AgNPs) are of interest due to their antimicrobial activity and are seen as potential candidates to replace antibiotics in animal husbandry. A few studies have focused on this new application, but they lack any considerations about residual accumulation of AgNPs in edible animal tissues and animal products. In this research, a 22 day in vivo study was carried out by oral administration of 20 nm spherical PVP coated AgNPs to hens. Six doses of approximately 1 mg kg(-1) of AgNPs-PVP each were administered to animals throughout the experimentation...
April 27, 2017: Journal of Agricultural and Food Chemistry
https://www.readbyqxmd.com/read/28412225/enhancing-tissue-permeability-with-mri-guided-preclinical-focused-ultrasound-system-in-rabbit-muscle-from-normal-tissue-to-vx2-tumor
#7
Yao Sun, Xiaobing Xiong, Darpan Pandya, Youngkyoo Jung, Akiva Mintz, Satoru Hayasaka, Thaddeus J Wadas, King C P Li
High Intensity Focused Ultrasound (HIFU) is an emerging noninvasive, nonionizing physical energy based modality to ablate solid tumors with high power, or increase local permeability in tissues/tumors in pulsed mode with relatively low power. Compared with traditional ablative HIFU, nondestructive pulsed HIFU (pHIFU) is present in the majority of novel applications recently developed for enhancing the delivery of drugs and genes. Previous studies have demonstrated the capability of pHIFU to change tissue local permeability for enhanced drug delivery in both mouse tumors and mouse muscle...
April 12, 2017: Journal of Controlled Release: Official Journal of the Controlled Release Society
https://www.readbyqxmd.com/read/28395773/improving-data-quality-and-preserving-hcd-generated-reporter-ions-with-ethcd-for-isobaric-tag-based-quantitative-proteomics-and-proteome-wide-ptm-studies
#8
Qing Yu, Xudong Shi, Yu Feng, K Craig Kent, Lingjun Li
Mass spectrometry (MS)-based isobaric labeling has undergone rapid development in recent years due to its capability for high throughput quantitation. Apart from its originally designed use with collision-induced dissociation (CID) and higher-energy collisional dissociation (HCD), isobaric tagging technique could also work with electron-transfer dissociation (ETD), which provides complementarity to CID and is preferred in sequencing peptides with post-translational modifications (PTMs). However, ETD suffers from long reaction time, reduced duty cycle and bias against peptides with lower charge states...
May 22, 2017: Analytica Chimica Acta
https://www.readbyqxmd.com/read/28362420/isolation-of-intact-mitochondria-from-skeletal-muscle-by-differential-centrifugation-for-high-resolution-respirometry-measurements
#9
Siamak Djafarzadeh, Stephan Mathias Jakob
Mitochondria are involved in cellular energy metabolism and use oxygen to produce energy in the form of adenosine triphosphate (ATP). Differential centrifugation at low- and high-speed is commonly used to isolate mitochondria from tissues and cultured cells. Crude mitochondrial fractions obtained by differential centrifugation are used for respirometry measurements. The differential centrifugation technique is based on the separation of organelles according to their size and sedimentation velocity. The isolation of mitochondria is performed immediately after tissue harvesting...
March 8, 2017: Journal of Visualized Experiments: JoVE
https://www.readbyqxmd.com/read/28338413/human-tissue-engineered-skeletal-muscle-myobundles-to-measure-oxygen-uptake-and-assess-mitochondrial-toxicity
#10
Brittany N J Davis, Jeffrey W Santoso, Michaela J Walker, Cindy S Cheng, Timothy R Koves, William E Kraus, George A Truskey
Mitochondrial dysfunction is responsible for the toxicity of a number of drugs. Current isolated mitochondria or cellular monoculture mitochondrial respiration measurement systems lack physiological relevance. Using a tissue engineering rather than cell- or mitochondria-based approach enables a more physiologically relevant detection of drug-induced mitochondrial impairment. To probe oxygen consumption and mitochondrial health, we assayed the bioenergetic profile of engineered three-dimensional human skeletal muscle myobundles derived from primary myoblasts...
April 2017: Tissue Engineering. Part C, Methods
https://www.readbyqxmd.com/read/28325000/mechanomyography-signals-in-spastic-muscle-and-the-correlation-with-the-modified-ashworth-scale
#11
E L Santos, M C Santos, E Krueger, G N Nogueira-Neto, P Nohama
The modified Ashworth scale (MAS) is the most widely used measurement technique to assess levels of spasticity. In MAS, the evaluator graduates spasticity considering his/her subjective analysis of the muscular endurance during passive stretching. Therefore, it is a subjective scale. Mechanomyography (MMG) allows registering the vibrations generated by muscle contraction and stretching events that propagate through the tissue until the surface of the skin. With this in mind, this study aimed to investigate possible correlations between MMG signal and muscle spasticity levels determined by MAS...
August 2016: Conference Proceedings: Annual International Conference of the IEEE Engineering in Medicine and Biology Society
https://www.readbyqxmd.com/read/28293194/quantification-of-internal-stress-strain-fields-in-human-tendon-unraveling-the-mechanisms-that-underlie-regional-tendon-adaptations-and-mal-adaptations-to-mechanical-loading-and-the-effectiveness-of-therapeutic-eccentric-exercise
#12
REVIEW
Constantinos N Maganaris, Panagiotis Chatzistergos, Neil D Reeves, Marco V Narici
By virtue of their anatomical location between muscles and bones, tendons make it possible to transform contractile force to joint rotation and locomotion. However, tendons do not behave as rigid links, but exhibit viscoelastic tensile properties, thereby affecting the length and contractile force in the in-series muscle, but also storing and releasing elastic stain energy as some tendons are stretched and recoiled in a cyclic manner during locomotion. In the late 90s, advancements were made in the application of ultrasound scanning that allowed quantifying the tensile deformability and mechanical properties of human tendons in vivo...
2017: Frontiers in Physiology
https://www.readbyqxmd.com/read/28272024/multidomain-proteins-under-force
#13
Jessica Valle-Orero, Jaime Andrés Rivas-Pardo, Ionel Popa
Advancements in single-molecule force spectroscopy techniques such as atomic force microscopy and magnetic tweezers allow investigation of how domain folding under force can play a physiological role. Combining these techniques with protein engineering and HaloTag covalent attachment, we investigate similarities and differences between four model proteins: I10 and I91-two immunoglobulin-like domains from the muscle protein titin, and two α + β fold proteins-ubiquitin and protein L. These proteins show a different mechanical response and have unique extensions under force...
April 28, 2017: Nanotechnology
https://www.readbyqxmd.com/read/28227340/mechanomyography-signals-in-spastic-muscle-and-the-correlation-with-the-modified-ashworth-scale
#14
E L Santos, M C Santos, E Krueger, G N Nogueira-Neto, P Nohama, E L Santos, M C Santos, E Krueger, G N Nogueira-Neto, P Nohama, G N Nogueira-Neto, M C Santos, E Krueger, E L Santos, P Nohama
The modified Ashworth scale (MAS) is the most widely used measurement technique to assess levels of spasticity. In MAS, the evaluator graduates spasticity considering his/her subjective analysis of the muscular endurance during passive stretching. Therefore, it is a subjective scale. Mechanomyography (MMG) allows registering the vibrations generated by muscle contraction and stretching events that propagate through the tissue until the surface of the skin. With this in mind, this study aimed to investigate possible correlations between MMG signal and muscle spasticity levels determined by MAS...
August 2016: Conference Proceedings: Annual International Conference of the IEEE Engineering in Medicine and Biology Society
https://www.readbyqxmd.com/read/28202349/muscle-ultrasound-and-sarcopenia-in-older-individuals-a-clinical-perspective
#15
REVIEW
Andrea Ticinesi, Tiziana Meschi, Marco V Narici, Fulvio Lauretani, Marcello Maggio
INTRODUCTION: A precise quantitative measurement of skeletal muscle mass is fundamental for diagnosing sarcopenia in older individuals. The current techniques of assessment, including dual-energy x-ray absorptiometry (DXA), bioimpedance analysis (BIA), and magnetic resonance imaging (MRI) are either difficult to perform in everyday clinical practice or biased by concurrent clinical confounders. B-mode muscle ultrasound can be helpful in assessing muscle mass and architecture, and thus possibly useful for diagnosing or screening sarcopenia...
April 1, 2017: Journal of the American Medical Directors Association
https://www.readbyqxmd.com/read/28198916/relationship-between-nutritional-status-and-the-clinical-outcomes-of-patients-with-and-without-neoplasms-according-to-multiple-correspondence-analysis
#16
Vânia Aparecida Leandro-Merhi, José Luiz Braga de Aquino
BACKGROUND: For many years, many studies have reported undesirable outcomes that may occur during the hospital stay of patients diagnosed with malnutrition or even at some nutritional risk. OBJECTIVE: To investigate the relationship between nutritional status and clinical outcomes during hospital stay using the multiple correspondence analysis technique. METHODS: This cross-sectional study included 600 patients with and without neoplasms. The following data were collected: subjective global assessment, nutritional indicators, nutritional risk screening, anthropometric data (body mass index (BMI), mid-upper arm circumference (MUAC), mid-upper arm muscle circumference (MUAMC), triceps skinfold thickness (TST), recent weight loss (RWL)), and habitual energy intake (HEI/ER <75%)...
February 13, 2017: Arquivos de Gastroenterologia
https://www.readbyqxmd.com/read/28139643/light-controls-cerebral-blood-flow-in-naive-animals
#17
Ravi L Rungta, Bruno-Félix Osmanski, Davide Boido, Mickael Tanter, Serge Charpak
Optogenetics is increasingly used to map brain activation using techniques that rely on functional hyperaemia, such as opto-fMRI. Here we test whether light stimulation protocols similar to those commonly used in opto-fMRI or to study neurovascular coupling modulate blood flow in mice that do not express light sensitive proteins. Combining two-photon laser scanning microscopy and ultrafast functional ultrasound imaging, we report that in the naive mouse brain, light per se causes a calcium decrease in arteriolar smooth muscle cells, leading to pronounced vasodilation, without excitation of neurons and astrocytes...
January 31, 2017: Nature Communications
https://www.readbyqxmd.com/read/28125537/the-lymphatic-response-to-injury-with-soft-tissue-reconstruction-in-high-energy-open-tibial-fractures-of-the-lower-extremity
#18
Malou C van Zanten, Raakhi M Mistry, Hiroo Suami, Andrew Campbell-Lloyd, James P Finkemeyer, Neil B Piller, Yugesh Caplash
BACKGROUND: Severe compound tibial fractures are associated with extensive soft-tissue damage, resulting in disruption of lymphatic pathways that leave the patient at risk of developing chronic lymphedema. There are limited data on lymphatic response following lower limb trauma. Indocyanine green fluorescence lymphography is a novel, real-time imaging technique for superficial lymphatic mapping. The authors used this technique to image the superficial lymphatic vessels of the lower limbs in patients with severe compound tibial fracture...
February 2017: Plastic and Reconstructive Surgery
https://www.readbyqxmd.com/read/28119063/in-vivo-31-p-mrs-of-skeletal-muscle-and-liver-a-way-for-non-invasive-assessment-of-their-metabolism
#19
Ladislav Valkovič, Marek Chmelík, Martin Krššák
In addition to direct assessment of high energy phosphorus containing metabolite content within tissues, phosphorus magnetic resonance spectroscopy ((31)P-MRS) provides options to measure phospholipid metabolites and cellular pH, as well as the kinetics of chemical reactions of energy metabolism in vivo. Even though the great potential of (31)P-MR was recognized over 30 years ago, modern MR systems, as well as new, dedicated hardware and measurement techniques provide further opportunities for research of human biochemistry...
January 21, 2017: Analytical Biochemistry
https://www.readbyqxmd.com/read/28079127/functional-nanoarchitectures-for-enhanced-drug-eluting-stents
#20
Yomna E Saleh, Mohamed A Gepreel, Nageh K Allam
Different strategies have been investigated to allow for optimum duration and conditions for endothelium healing through the enhancement of coronary stents. In this study, a nanoarchitectured system is proposed as a surface modification for drug eluting stents. Highly oriented nanotubes were vertically grown on the surface of a new Ni-free biocompatible Ti-based alloy, as a potential material for self-expandable stents. The fabricated nanotubes were self-grown from the potential stent substrate, which are also proposed to enhance endothelial proliferation while acting as drug reservoir to hinder Vascular Smooth Muscle Cells (VSMC) proliferation...
January 12, 2017: Scientific Reports
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