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https://www.readbyqxmd.com/read/28078451/slower-but-not-faster-unilateral-fatiguing-knee-extensions-alter-contralateral-limb-performance-without-impairment-of-maximal-torque-output
#1
Olaf Prieske, Saied J Aboodarda, José A Benitez Sierra, David G Behm, Urs Granacher
PURPOSE: The purpose of the present study was to examine the effects of unilateral fatigue of the knee extensors at different movement velocities on neuromuscular performance in the fatigued and non-fatigued leg. METHODS: Unilateral fatigue of the knee extensors was induced in 11 healthy young men (23.7 ± 3.8 years) at slower (60°/s; FAT60) and faster movement velocities (240°/s; FAT240) using an isokinetic dynamometer. A resting control (CON) condition was included...
January 11, 2017: European Journal of Applied Physiology
https://www.readbyqxmd.com/read/28073316/clinical-implications-of-the-anatomical-variation-of-deep-venous-thrombosis
#2
Ayman El-Menyar, Mohammad Asim, Gaby Jabbour, Hassan Al-Thani
Introduction Little is known about the anatomic variation and its implication in patients with lower limb deep venous thrombosis (DVT). We studied the clinical presentation, site of thrombosis and risk factors based on the anatomic distribution of lower limb DVT. Methods A retrospective analysis of clinically suspected DVT cases was conducted between 2008 and 2012. DVT was categorized by the location of the thrombosed segment and limb involved. The DVT anatomic segments were assessed according to left-to-right ratio, predisposing factors and clinical presentations...
January 1, 2017: Phlebology
https://www.readbyqxmd.com/read/28066748/the-use-of-platelet-rich-plasma-to-augment-conservative-and-surgical-treatment-of-hip-and-pelvic-disorders
#3
REVIEW
Matthew J Kraeutler, Tigran Garabekyan, Omer Mei-Dan
BACKGROUND: In recent years, platelet-rich plasma (PRP) has gained popularity within the orthopaedic community as a treatment modality to enhance tissue healing. PURPOSE: This review aims to concisely present the current indications for PRP injections in the treatment of hip and pelvic pathologies and to describe some novel applications for PRP which have not yet been reported in the literature. METHODS: We reviewed the literature on the non-operative and operative indications for PRP in the treatment of hip and pelvic pathologies...
July 2016: Muscles, Ligaments and Tendons Journal
https://www.readbyqxmd.com/read/28066745/deep-gluteal-space-problems-piriformis-syndrome-ischiofemoral-impingement-and-sciatic-nerve-release
#4
Luis Perez Carro, Moises Fernandez Hernando, Luis Cerezal, Ivan Saenz Navarro, Ana Alfonso Fernandez, Alexander Ortiz Castillo
BACKGROUND: Deep gluteal syndrome (DGS) is an underdiagnosed entity characterized by pain and/or dysesthesias in the buttock area, hip or posterior thigh and/or radicular pain due to a non-discogenic sciatic nerve entrapment in the subgluteal space. Multiple pathologies have been incorporated in this all-included "piriformis syndrome", a term that has nothing to do with the presence of fibrous bands, obturator internus/gemellus syndrome, quadratus femoris/ischiofemoral pathology, hamstring conditions, gluteal disorders and orthopedic causes...
July 2016: Muscles, Ligaments and Tendons Journal
https://www.readbyqxmd.com/read/28063610/ultrasound-measurements-of-skeletal-muscle-architecture-are-associated-with-strength-and-functional-capacity-in-older-adults
#5
Isaac Selva Raj, Stephen R Bird, Anthony J Shield
The goal of this study was to determine whether ultrasound measures of muscle architecture can be used to infer strength and functional capacity in older adults. Thirty-six healthy older adults (aged 68.2 ± 5.3 y) undertook isokinetic dynamometry for isometric and isokinetic concentric knee extensor strength, the 6-m fast walk, timed up and go, stair climb and descent and vertical jump tests. Longitudinal brightness-mode ultrasound scans (probe frequency, 10 MHz) of the vastus lateralis, vastus intermedius, rectus femoris and gastrocnemius medialis were obtained, and muscle architecture measures (thickness, fascicle pennation angle and fascicle length) were correlated with the aforementioned strength and functional measures...
January 4, 2017: Ultrasound in Medicine & Biology
https://www.readbyqxmd.com/read/28056872/a-limb-girdle-myopathy-phenotype-of-runx2-mutation-in-a-patient-with-cleidocranial-dysplasia-a-case-study-and-literature-review
#6
Sung-Ju Hsueh, Ni-Chung Lee, Shu-Hua Yang, Han-I Lin, Chin-Hsien Lin
BACKGROUND: Cleidocranial dysplasia (CCD) is a rare hereditary disorder that arises from heterozygous loss of function mutations in the runt-related transcription factor 2 (RUNX2) gene. As RUNX2 is mainly expressed in osteoblasts, CCD typically affects the skeletal and dental systems. Few studies have investigated RUNX2 mutation effects on non-skeletal systems. Here, we describe limb-girdle myopathy, an uncommon phenotype of CCD, in a patient with a heterozygous missense mutation (p.R225Q) in the RUNX2 gene...
January 6, 2017: BMC Neurology
https://www.readbyqxmd.com/read/28056670/electromyographic-comparison-of-conventional-machine-strength-training-versus-bodyweight-exercises-in-patients-with-chronic-stroke
#7
Jonas Vinstrup, Joaquin Calatayud, Markus D Jakobsen, Emil Sundstrup, Kenneth Jay, Mikkel Brandt, Peter Zeeman, Jørgen R Jørgensen, Lars L Andersen
OBJECTIVE: To investigate whether bodyweight exercises can induce comparable levels of muscle activity as conventional machine exercises in chronic stroke patients. METHODS: Eighteen patients performed three repetitions of bilateral- and unilateral machine leg press and the bodyweight exercises chair rise and hip thrust. Surface electromyography (EMG) was recorded from 10 lower extremity muscles and normalized to maximal EMG (nEMG) of the non-paretic leg. RESULTS: For the paretic leg, the bodyweight exercises showed comparable levels of nEMG in 6 out of 10 muscles compared with the bilateral leg press...
January 6, 2017: Topics in Stroke Rehabilitation
https://www.readbyqxmd.com/read/28053820/effects-of-different-concurrent-resistance-and-aerobic-training-frequencies-on-muscle-power-and-muscle-quality-in-trained-elderly-men-a-randomized-clinical-trial
#8
Rodrigo Ferrari, Sandra C Fuchs, Luiz Fernando Martins Kruel, Eduardo Lusa Cadore, Cristine Lima Alberton, Ronei Silveira Pinto, Régis Radaelli, Maira Schoenell, Mikel Izquierdo, Hirofumi Tanaka, Daniel Umpierre
Muscle power is a strong predictor of functional status in the elderly population and is required to perform different daily activities. To compare the effects of different weekly training frequencies on muscle power and muscle quality induced by concurrent training (resistance + aerobic) in previously trained elderly men. Twenty-four trained elderly men (65 ± 4 years), previously engaged in a regular concurrent training program, three times per week, for the previous five months, were randomly allocated to concurrent training programs in which training was performed either twice a week (2·week(-1), n = 12) or three times per week (3·week(-1), n = 12)...
December 2016: Aging and Disease
https://www.readbyqxmd.com/read/28053000/myoblast-replication-is-reduced-in-the-iugr-fetus-despite-maintained-proliferative-capacity-in-vitro
#9
Susan M Soto, Amy C Blake, Stephanie R Wesolowski, Paul J Rozance, Kristen B Barthel, Bifeng Gao, Byron Hetrick, Carrie McCurdy, Natalia G Garza, William Hay, Leslie A Leinwand, Jacob E Friedman, Laura D Brown
Adults who were affected by intrauterine growth restriction (IUGR) suffer from reductions in muscle mass and insulin resistance, suggesting muscle growth may be restricted by molecular events that occur during fetal development. To explore the basis of restricted fetal muscle growth, we used a sheep model of progressive placental insufficiency-induced IUGR to assess myoblast proliferation within intact skeletal muscle in vivo and isolated myoblasts stimulated with insulin in vitro. Gastrocnemius and soleus muscle weights were reduced by 25% in IUGR fetuses compared to controls (CON)...
January 4, 2017: Journal of Endocrinology
https://www.readbyqxmd.com/read/28044357/effect-of-aging-on-region-specific-functional-role-and-muscle-geometry-along-human-rectus-femoris-muscle
#10
Kohei Watanabe, Motoki Kouzaki, Toshio Moritani
Introduction We compared the region-specific neuromuscular activation and muscle morphology along the rectus femoris (RF) muscle between young and elderly. Methods Ratios of surface electromyography amplitude between hip flexion and knee extension (HF/KE) were compared among regions along the muscle for nine young and nine elderly men. The muscle thickness was also compared among the regions. Results HF/KE in the proximal region was significantly greater than in the middle and distal regions for both the young and elderly (p < 0...
January 3, 2017: Muscle & Nerve
https://www.readbyqxmd.com/read/28035857/rectus-femoris-cross-sectional-area-and-muscle-layer-thickness-comparative-markers-of-muscle-wasting-and-weakness
#11
Zudin A Puthucheary, Angela S McNelly, Jai Rawal, Bronwen Connolly, Paul S Sidhu, Anthea Rowlerson, John Moxham, Stephen D Harridge, Nicholas Hart, Hugh E Montgomery
No abstract text is available yet for this article.
January 1, 2017: American Journal of Respiratory and Critical Care Medicine
https://www.readbyqxmd.com/read/28035165/characterization-of-volatile-compounds-physico-chemical-and-sensory-characteristics-of-smoked-dry-cured-ham
#12
Nives Marušić Radovčić, Sanja Vidaček, Tibor Janči, Helga Medić
Volatile compounds from smoked dry-cured ham were isolated by using headspace-solid phase microextraction and gas chromatography-mass spectrometry (GC-MS). Samples of biceps femoris were also evaluated for sensory physical and chemical characteristics. Eighty seven volatile aroma compounds of smoked dry-cured ham were identified. Chemical groups identified were aldehydes (35.6%), phenols (34.3%), alcohols (13.8%), terpenes (6.4%), aromatic hydrocarbons (2.6%), alkanes (2.2%), ketones (2.2%), esters (1.7%) and acids (0...
November 2016: Journal of Food Science and Technology
https://www.readbyqxmd.com/read/28032690/free-profunda-femoris-artery-perforator-flap-as-a-first-line-choice-of-reconstruction-for-partial-glossectomy-defects
#13
Ricardo Fernández-Riera, Shao-Yu Hung, Jerry Chih-Wei Wu, Chung-Kan Tsao
BACKGROUND: Free profunda artery perforator (PAP) flap has recently been brought back for head and neck reconstruction. During the course of 1 year, we performed this procedure for reconstruction of partial glossectomy defects with excellent results. METHODS: From January through December 2015, 21 patients underwent partial glossectomy reconstruction with PAP flaps. Demographics, surgical technique, anatomic variations, success rates, complications, and characteristics are described...
December 29, 2016: Head & Neck
https://www.readbyqxmd.com/read/28028870/neuromuscular-performance-of-maximal-voluntary-explosive-concentric-contractions-is-influenced-by-angular-acceleration
#14
D Hahn, P Bakenecker, F Zinke
Torque production during maximal voluntary explosive contractions is considered to be a functionally more relevant neuromuscular measure than steady-state torque, but little is known about accelerated concentric contractions. This study investigated torque, muscle activity, and fascicle behavior during isometric and fast concentric contractions of quadriceps femoris. Ten participants performed maximal voluntary explosive isometric, isovelocity, and additional concentric knee extensions at angular accelerations ranging from 700 to 4000° s(-2) that resulted in an angular velocity of 300° s(-1) at 40° knee flexion...
December 28, 2016: Scandinavian Journal of Medicine & Science in Sports
https://www.readbyqxmd.com/read/28026739/-avulsion-of-the-proximal-hamstring-insertion-case-reports
#15
R Mizera, R Harcuba, J Kratochvíl
Proximal hamstring avulsion is an uncommon muscle injury with a lack of consensus on indications and the timing and technique of surgery. Poor clinical symptoms and difficulties in the diagnostic process can lead to a false diagnosis. The authors present three cases of proximal hamstring avulsion, two complete and one partial ruptures of the biceps femoris muscle. MRI and ultrasound scans were used for optimal treatment alignment. Acute surgery reconstruction (< 4 weeks) was done in two patients. Re-attachment of the full thickness ruptures was performed to the original place and secured by suture anchors, the partial rupture was fixed by a simple suture...
2016: Acta Chirurgiae Orthopaedicae et Traumatologiae Cechoslovaca
https://www.readbyqxmd.com/read/28026725/-operative-treatment-for-saddle-shaped-femoral-heads
#16
M Burian, P Dungl, J Chomiak, M Ošťádal, R Kubeš, O Schwarz
PURPOSE OF THE STUDY A saddle-shaped deformity of the femoral head has a poor prognosis due to rapid development of secondary changes. A new method of treatment by intra-articular anteromedial wedge reduction osteotomy (AWRO) of the femoral head may preserve the hip for the future. This study was designed to ascertain that this invasive technique was safe and effective and to confirm our hypothesis that AWRO significantly improved functional and radiological parameters of the hip joint. MATERIAL AND METHODS Patients who underwent AWRO between 2010 and 2013 were enrolled in this study...
2016: Acta Chirurgiae Orthopaedicae et Traumatologiae Cechoslovaca
https://www.readbyqxmd.com/read/28018193/are-modular-activations-altered-in-lower-limb-muscles-of-persons-with-multiple-sclerosis-during-walking-evidence-from-muscle-synergies-and-biomechanical-analysis
#17
Tiziana Lencioni, Johanna Jonsdottir, Davide Cattaneo, Alessandro Crippa, Elisa Gervasoni, Marco Rovaris, Emilio Bizzi, Maurizio Ferrarin
Background: Persons with Multiple Sclerosis frequently have gait deficits that lead to diminished activities of daily living. Identification of motoneuron activity patterns may elucidate new insight into impaired locomotor coordination and underlying neural systems. The aim of the present study was to investigate muscle synergies, identified by motor modules and their activation profiles, in persons with Multiple Sclerosis (PwMS) during walking compared to those of healthy subjects (HS), as well as, exploring relationship of muscle synergies with walking ability of PwMS...
2016: Frontiers in Human Neuroscience
https://www.readbyqxmd.com/read/28017604/effect-of-the-abdominal-hollowing-and-bracing-maneuvers-on-activity-pattern-of-the-lumbopelvic-muscles-during-prone-hip-extension-in-subjects-with-or-without-chronic-low-back-pain-a-preliminary-study
#18
Amir H Kahlaee, Leila Ghamkhar, Amir M Arab
OBJECTIVE: The purpose of this study was to compare the effect of abdominal hollowing (AH) and abdominal bracing (AB) maneuvers on the activity pattern of lumbopelvic muscles during prone hip extension (PHE) in participants with or without nonspecific chronic low back pain (CLBP). METHODS: Twenty women with or without CLBP participated in this cross-sectional observational study. The electromyographic activity (amplitude and onset time) of the contralateral erector spinae (CES), ipsilateral erector spinae (IES), gluteus maximus, and biceps femoris muscles was measured during PHE with and without abdominal maneuvers...
December 22, 2016: Journal of Manipulative and Physiological Therapeutics
https://www.readbyqxmd.com/read/28017295/older-adults-show-higher-increases-in-lower-limb-muscle-activity-during-whole-body-vibration-exercise
#19
Karin Lienhard, Jordyn Vienneau, Sandro Nigg, Bernd Friesenbichler, Benno M Nigg
The purpose of this study was to compare lower limb muscle activity during whole-body vibration (WBV) exercise between a young and an older study population. Thirty young (25.9±4.3yrs) and thirty older (64.2±5.3yrs) individuals stood on a side-alternating WBV platform while surface electromyography (sEMG) was measured for the tibialis anterior (TA), gastrocnemius medialis (GM), soleus (SOL), vastus lateralis (VL), vastus medialis (VM), and biceps femoris (BF). The WBV protocol included nine vibration settings consisting of three frequencies (6, 11, 16Hz) x three amplitudes (0...
December 14, 2016: Journal of Biomechanics
https://www.readbyqxmd.com/read/28010997/patellar-tendon-mechanical-properties-change-with-gender-body-mass-index-and-quadriceps-femoris-muscle-strength
#20
Serkan Taş, Seval Yılmaz, Mehmet Ruhi Onur, Abdullah Ruhi Soylu, Onur Altuntaş, Feza Korkusuz
OBJECTIVE: The purpose of this study is to assess the effect and correlation of gender, body mass index (BMI) and quadriceps femoris (QF) muscle strength on patellar tendon (PT) thickness and stiffness in healthy sedentary individuals. METHODS: This study was carried out with 67 (36 female, 31 male) healthy sedentary individuals between the ages of 18-44 (28.0 ± 7.5 years). The individuals included in the study were divided into two groups according to their gender and BMI (18...
December 20, 2016: Acta Orthopaedica et Traumatologica Turcica
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