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https://www.readbyqxmd.com/read/28438452/muscle-damage-after-total-hip-arthroplasty-through-the-direct-anterior-approach-for-developmental-dysplasia-of-the-hip
#1
Masashi Kawasaki, Yukiharu Hasegawa, Toshiaki Okura, Satoshi Ochiai, Takayoshi Fujibayashi
BACKGROUND: Total hip arthroplasty (THA) through the direct anterior approach (DAA) is known to cause less muscle damage than other surgical approaches. However, more complex primary cases, such as developmental dysplasia of the hip (DDH), might often cause muscle damage. The objective of the present study was to clarify the muscle damage observed 1 year after THA through the DAA for DDH using magnetic resonance imaging. METHODS: We prospectively compared the muscle cross-sectional area (M-CSA) and fatty atrophy (FA) in muscles by magnetic resonance imaging and the Harris hip score before and at 1-year follow-up after THA through the DAA in 3 groups: 37 patients with Crowe group 1 DDH (D1), 13 patients with Crowe group 2 and 3 DDH (D2 + 3), and 12 patients with osteonecrosis as a control...
March 27, 2017: Journal of Arthroplasty
https://www.readbyqxmd.com/read/28429109/associations-of-maximal-voluntary-isometric-hip-extension-torque-with-muscle-size-of-hamstring-and-gluteus-maximus-and-intra-abdominal-pressure
#2
Kota Tayashiki, Kosuke Hirata, Kiraku Ishida, Hiroaki Kanehisa, Naokazu Miyamoto
PURPOSE: Muscle size of the hamstring and gluteus maximus (GM) as well as intra-abdominal pressure (IAP) are considered as factors affecting the torque development during hip extension. This study examined the associations of torque development during maximal voluntary isometric hip extension with IAP and muscle size of the hamstring and GM. METHODS: Anatomical cross-sectional area (ACSA) of the hamstring and thickness of GM were determined in 20 healthy young males using an ultrasonography apparatus (Experiment 1)...
April 20, 2017: European Journal of Applied Physiology
https://www.readbyqxmd.com/read/28427422/differences-in-muscle-activity-and-temporal-step-parameters-between-lokomat-guided-walking-and-treadmill-walking-in-post-stroke-hemiparetic-patients-and-healthy-walkers
#3
Klaske van Kammen, Anne M Boonstra, Lucas H V van der Woude, Heleen A Reinders-Messelink, Rob den Otter
BACKGROUND: The Lokomat is a robotic exoskeleton that can be used to train gait function in hemiparetic stroke. To purposefully employ the Lokomat for training, it is important to understand (1) how Lokomat guided walking affects muscle activity following stroke and how these effects differ between patients and healthy walkers, (2) how abnormalities in the muscle activity of patients are modulated through Lokomat guided gait, and (3) how temporal step characteristics of patients were modulated during Lokomat guided walking...
April 20, 2017: Journal of Neuroengineering and Rehabilitation
https://www.readbyqxmd.com/read/28413551/alveolar-soft-part-sarcoma-with-brain-metastases
#4
Vinodh Vayara Perumall, Rahmat Harun, Pulivendhan Sellamuthu, Mohd Shariman Md Shah
Metastatic tumors are the most common mass lesions in the brain. This case reports a rare form of sarcoma with metastasis to the brain. The appropriate management of a patient with metastatic alveolar soft part sarcoma to the brain is discussed. Author describes a 32-year-old gentleman diagnosed with primary tumor at gluteus and distant metastases at lower lobe of right lung and the brain. Histopathology proves diagnosis as alveolar soft part sarcoma. Craniotomy with excision of brain lesion was done. Repeated magnetic resonance imaging of the brain after 2 months showed rapidly growing new lesions...
January 2017: Asian Journal of Neurosurgery
https://www.readbyqxmd.com/read/28406571/hominin-hip-biomechanics-changing-perspectives
#5
Anna G Warrener
The shape of the human pelvis reflects the unique demands placed on the hip abductor muscles (gluteus medius and gluteus minimus), which stabilize the body in the frontal plane during bipedal locomotion. This morphological shift occurred early in hominin evolution, yet important shape differences between hominin species have led to significant disagreement about abductor function and locomotor capability in these extinct taxa. A static biomechanical model that relies on a close association between skeletal measurements of the pelvis and femur has traditionally been used to reconstruct hip biomechanics in these species...
May 2017: Anatomical Record: Advances in Integrative Anatomy and Evolutionary Biology
https://www.readbyqxmd.com/read/28400615/the-neuromuscular-origins-of-kinematic-variability-during-perturbed-walking
#6
Heather E Stokes, Jessica D Thompson, Jason R Franz
We investigated the neuromuscular contributions to kinematic variability and thus step to step adjustments in posture and foot placement across a range of walking speeds in response to optical flow perturbations of different amplitudes using a custom virtual environment. We found that perturbations significantly increased step width, decreased step length, and elicited larger trunk sway compared to normal walking. However, perturbation-induced effects on the corresponding variabilities of these measurements were much more profound...
April 11, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28394829/electromyographical-comparison-of-muscle-activation-patterns-across-three-commonly-performed-kettlebell-exercises
#7
Brian C Lyons, Jerry J Mayo, W Steve Tucker, Ben Wax, Russell C Hendrix
The purpose of this study was to compare the muscle activation patterns of three different kettlebell (KB) exercises using electromyography (EMG). Fourteen resistance-trained subjects completed a one-arm swing (Swing), one-arm swing style snatch (Snatch), and a one-arm clean (Clean) using a self-selected 8-10 RM load for each exercise. Trial sessions consisted of subjects performing 5 repetitions of each kettlebell exercise. Mean EMG was used to assess the muscle activation of the biceps brachii (BB), anterior deltoid (AD), posterior deltoid (PD), erector spinae (ES), vastus lateralis (VL), biceps femoris (BF), contralateral external oblique (EO), and gluteus maximus (GM) during each lift using surface electrodes...
December 20, 2016: Journal of Strength and Conditioning Research
https://www.readbyqxmd.com/read/28392635/position-of-the-sciatic-nerve-and-effect-of-gluteus-maximus-release-during-hip-arthroplasty
#8
Andrew J Kanawati, Rajpal Narulla, Peter Lorentzos, Edward Graham
Eight Thiel embalmed hips were dissected. The distance between the sciatic nerve and the femoral neck was measured before and after hip dislocation, and before and after release of the gluteus maximus tendon. There was a significant reduction in the mean distance between the neck of femur and the sciatic nerve in both the gluteus maximus tendon release and the unreleased groups at 60° and 90° of hip flexion, p < 0.05. The mean distance between the neck of femur and sciatic nerve was greater in the release group for all positions...
June 2017: Journal of Orthopaedics
https://www.readbyqxmd.com/read/28390662/influence-of-aging-on-microvascular-supply-of-the-gluteus-medius-tendon-a-cadaveric-and-histologic-study
#9
William H Márquez-Arabia, Juan Gómez-Hoyos, Marcela Gómez, Isabel Flórez, Jaime A Gallo, Francisco Monsalve, Luis F Arias, Hal D Martin
PURPOSE: The purpose of this cadaveric study was to assess the relation between age and microvascular supply of 3 areas of the gluteus medius tendon using a previously validated CD31 immunohistochemistry staining technique. METHODS: Twenty-four fresh-frozen gluteus medius specimens were obtained through a posterolateral approach to the hip. Specimens aged 18 years or older, of either sex, and of any race were considered for this study. The average age of donors was 47...
April 5, 2017: Arthroscopy: the Journal of Arthroscopic & related Surgery
https://www.readbyqxmd.com/read/28371661/applying-an-active-lumbopelvic-control-strategy-during-lumbar-extension-exercises-effect-on-muscle-recruitment-patterns-of-the-lumbopelvic-region
#10
Jessica Van Oosterwijck, Eline De Ridder, Andry Vleeming, Guy Vanderstraeten, Stijn Schouppe, Lieven Danneels
OBJECTIVE: Examine whether implementing an active lumbopelvic control strategy during high load prone lumbar extension exercises affects posterior extensor chain recruitment and lumbopelvic kinematics. METHODS: Thirteen healthy adults acquired an optimal active lumbopelvic control strategy during guided/home-based training sessions. During the experimental session electromyography was used to evaluate the activity of the posterior extensor chain muscles during high load trunk/bilateral leg extension exercises with/without application of the strategy...
March 31, 2017: Human Movement Science
https://www.readbyqxmd.com/read/28367770/effects-of-training-distance-on-feed-intake-growth-body-condition-and-muscle-glycogen-content-in-young-standardbred-horses-fed-a-forage-only-diet
#11
S Ringmark, T Revold, A Jansson
This study examined feed intake, growth, body condition, muscle glycogen content and nutrition-related health in 16 Standardbred horses fed a high-energy, forage-only diet ad libitum and allocated to either a control training programme (C-group) or a training programme with the high-intensity training distance reduced by 30% (R-group), from January as 2-year olds until December as 3-year olds. Feed intake was recorded on 10 occasions during 3 consecutive days. Body weight was recorded once in a week and height, body condition score (BCS), rump fat thickness and thickness of the m...
April 3, 2017: Animal: An International Journal of Animal Bioscience
https://www.readbyqxmd.com/read/28361652/electrical-activity-of-powerhouse-muscles-during-the-teaser-exercise-of-pilates-using-different-types-of-apparatus
#12
Débora da Rocha Werba, Débora Cantergi, Leandro Tolfo Franzoni, Alex de Oliveira Fagundes, Jefferson Fagundes Loss, Aline Nogueira Haas
We compared the electrical activity of certain powerhouse muscles-External Oblique, Multifidus, Adductor Longus, and Gluteus Medius-during the teaser exercise of the Pilates Method, performed on various types of apparatus-the Mat, Reformer, and Wall Unit. Fifteen female practitioners of the Classic Pilates Method (32.6 ± 7.7 years old; 21.9 ± 1.9 body mass index) performed the teaser in each situation while electromyographic (EMG) and kinematic data were collected. Root mean square values of the flexion phase were compared...
April 2017: Perceptual and Motor Skills
https://www.readbyqxmd.com/read/28356634/comparison-of-anterior-gluteus-medius-fiber-activation-during-general-exercises-and-pnf-exercises
#13
Sung-Kwang Ju, Won-Gyu Yoo
[Purpose] This study compared the activation of anterior gluteus medius fibers during general exercises and proprioceptive neuromuscular facilitation exercises. [Subjects and Methods] The study enrolled 15 healthy adults. The participants performed general hip abductor strengthening exercises and proprioceptive neuromuscular facilitation exercises; during both types of exercise, electromyography activity was recorded. [Results] Greater anterior gluteus medius fiber activation was observed during the proprioceptive neuromuscular facilitation exercises compared with the general hip abductor strengthening exercises...
March 2017: Journal of Physical Therapy Science
https://www.readbyqxmd.com/read/28356627/examination-of-center-of-pressure-displacement-and-muscle-activity-of-the-hip-girdle-muscles-on-lateral-movement-in-the-sitting-position-focusing-on-kinematic-features-before-and-after-the-start-of-exercise
#14
Kouji Ikeda, Kenji Suehiro, Akito Kizu, Hideki Kunieda, Hirokazu Takasaki, Toshiaki Suzuki
[Purpose] This study aimed to evaluate the kinematic characteristics at the start of lateral movement in the sitting position, for application in physical therapy. [Subjects and Methods] Eleven healthy male subjects (mean age, 24.8 ± 3.7 years) were included in the study after they provided informed consent. The electromyographic activities of the tensor fascia lata, gluteus medius, and rectus femoris, and the center of pressure (COP) displacement during lateral reach in the sitting position were measured...
March 2017: Journal of Physical Therapy Science
https://www.readbyqxmd.com/read/28350716/movement-strategies-among-groups-of-chronic-ankle-instability-coper-and-control
#15
S Jun Son, Hyunsoo Kim, Mattew K Seeley, J Ty Hopkins
INTRODUCTION: Comprehensive evaluation of movement strategies during functional movement is a difficult undertaking. Because of this challenge, studied movements have been over simplified. Furthermore, evaluating movement strategies at only a discrete time point(s) provide limited insight into how movement strategies may change or adapt in chronic ankle instability (CAI) patients. This study aimed to identify abnormal movement strategies in individuals with a history of ankle sprain injury during a sports maneuver compared to healthy controls...
March 27, 2017: Medicine and Science in Sports and Exercise
https://www.readbyqxmd.com/read/28349768/effect-of-body-weight-support-variation-on-muscle-activities-during-robot-assisted-gait-a-dynamic-simulation-study
#16
Shahid Hussain, Prashant K Jamwal, Mergen H Ghayesh
BACKGROUND AND OBJECTIVES: While body weight support (BWS) intonation is vital during conventional gait training of neurologically challenged subjects, it is important to evaluate its effect during robot assisted gait training. In the present research we have studied the effect of BWS intonation on muscle activities during robotic gait training using dynamic simulations. METHODS: Two dimensional (2-D) musculoskeletal model of human gait was developed conjointly with another 2-D model of a robotic orthosis capable of actuating hip, knee and ankle joints simultaneously...
May 2017: Computer Methods in Biomechanics and Biomedical Engineering
https://www.readbyqxmd.com/read/28349211/shoulder-hemiarthroplasty-for-proximal-humeral-fractures-analysis-of-clinical-and-radiographic-outcomes-at-midterm-follow-up-a-series-of-51-patients
#17
Ph Valenti, D Aliani, Ch Maroun, J D Werthel, K Elkolti
Shoulder hemiarthroplasty has historically been the gold standard treatment for proximal humeral fractures not suitable to open reduction and internal fixation. In the last decades, reverse shoulder arthroplasty has gained more and more importance. Aim of this study is to retrospectively analyze subjective and objective outcomes of a group of consecutive patients. Fifty-one patients were evaluated with a mean follow-up of 18 months (range 12-60). For all the cases, the same surgical technique was performed in all cases...
April 2017: European Journal of Orthopaedic Surgery & Traumatology: Orthopédie Traumatologie
https://www.readbyqxmd.com/read/28344736/recovery-of-hip-and-back-muscle-fatigue-following-a-back-extension-endurance-test
#18
Sharon Wang-Price, Mohammad Almadan, Carissa Stoddard, Dustin Moore
Literature has not shown the minimum time required to recover from muscle fatigue after a prolonged trunk isometric contraction. The purpose of this study was to determine if the lumbar multifidus (LM) and gluteus maximus (GM) muscles would recover from fatigue after three different rest periods following performance of a back extension endurance test. Endurance time and electromyographic (EMG) activity of bilateral LM and GM muscles were collected from 12 healthy adults during a modified Biering-Sørensen test...
2017: International Journal of Exercise Science
https://www.readbyqxmd.com/read/28328567/effects-of-a-simulated-game-on-upper-extremity-pitching-mechanics-and-muscle-activations-among-various-pitch-types-in-youth-baseball-pitchers
#19
Gretchen D Oliver, Hillary Plummer, Lisa Henning, Michael Saper, Gabrielle Glimer, Allison Brambeck, James R Andrews
BACKGROUND: Throwing requires proper stability and orientation of the pelvis and scapula for efficient energy transfer during pitching. Fatigue of the pelvis and scapular musculature throughout the course of a game can impair pitching performance, and place excessive demands on the throwing arm leading to injury. The purpose of this study was to examine differences in pelvis, torso, and upper extremity pitching mechanics and muscle activations between the fastball, change-up, and curveball pitches in youth baseball pitchers following a simulated game...
March 21, 2017: Journal of Pediatric Orthopedics
https://www.readbyqxmd.com/read/28318816/use-of-electromyography-to-optimize-lokomat-%C3%A2-settings-for-subject-specific-gait-rehabilitation-in-post-stroke-hemiparetic-patients-a-proof-of-concept-study
#20
Yosra Cherni, Mickael Begon, Hicham Chababe, Florent Moissenet
OBJECTIVES: While generic protocols exist for gait rehabilitation using robotic orthotics such as the Lokomat(®), several settings - guidance, body-weight support (BWS) and velocity - may be adjusted to individualize patient training. However, no systematic approach has yet emerged. Our objective was to assess the feasibility and effects of a systematic approach based on electromyography to determine subject-specific settings with application to the strengthening of the gluteus maximus muscle in post-stroke hemiparetic patients...
March 16, 2017: Neurophysiologie Clinique, Clinical Neurophysiology
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