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gluteus medius

Alexandra DeJong, L Colby Mangum, Jacob Resch, Susan A Saliba
CONTEXT: Medial knee displacement (MKD) is a common risk factor for lower extremity injury and is related to altered gluteal muscle activity. Ultrasound imaging (USI) is a reliable means to explore mechanical muscle activity, however no information exists regarding USI of the gluteals during gait in a MKD population. OBJECTIVE: To determine differences in USI gluteal muscle activity during gait in individuals with and without MKD. DESIGN: Descriptive laboratory study...
March 15, 2018: Journal of Sport Rehabilitation
Giovanna Camparis Lessi, Rodrigo Scattone Silva, Fábio Viadanna Serrão
OBJECTIVES: Studies comparing the effects of fatigue between men and women after anterior cruciate ligament (ACL) reconstruction are lacking. The purpose of this study was to compare the effects of muscle fatigue on trunk, pelvis and lower limb kinematics and on lower limb muscle activation between male and female athletes who underwent ACL reconstruction. DESIGN: Cross-sectional study. SETTING: Laboratory setting. PARTICIPANTS: Fourteen recreational athletes (7 males and 7 females) with unilateral ACL reconstruction participated of this study...
February 5, 2018: Physical Therapy in Sport
Kwang Ho Cho, Zhe Wu Jin, Hiroshi Abe, Jőrg Wilting, Gen Murakami, José Francisco Rodríguez-Vázquez
The human fasciae latae muscle (TFL) is inserted into the iliotibial tract and plays a critical role in lateral stabilization of the hip joint. We previously described a candidate of the initial iliotibial tract that originated from the gluteus maximus muscle and extended distally. This study extended our observations by examining 30 human embryos and fetuses of gestational age (GA) 7-14 (crown-to-rump length [CR:] 24-108 mm). At GA 7 weeks, the TFL appeared as a small muscle mass floating in the subcutaneous tissue near the origins of the gluteus medius and rectus femoris muscles...
March 3, 2018: Folia Morphologica (Warsz)
Rasmus S Husted, Jesper Bencke, Per Hölmich, Lars L Andersen, Kristian Thorborg, Thomas Bandholm, Bjørn Gliese, Hanne B Lauridsen, Grethe Myklebust, Per Aagaard, Mette K Zebis
Background: Reduced lower extremity muscle strength as well as reduced lower extremity muscle pre-activity (defined as muscular activity just prior to initial ground contact) during high-risk movements are factors related to increased risk of non-contact ACL injury in adolescent female athletes. A strong relationship exists between muscle strength and muscle activity obtained during an isometric contraction, however, whether these two measures are related when muscle activity is obtained during a movement associated with a high risk of non-contact ACL injury is not known...
February 2018: International Journal of Sports Physical Therapy
Emrah Kovalak, Hanife Özdemir, Cenk Ermutlu, Abdullah Obut
OBJECTIVES: The aim of this study was to evaluate how fatty atrophy (FA) of the hip abductors in operated and non-operated hips affected the functional outcome following arthroplasty. METHODS: Forty-four hips of 22 patients (8 males and 14 females; mean age: 60 ± 14.4 (range: 24-84)) who matched the inclusion criteria and willing to participate in the study were retrospectively evaluated. The mean follow-up was 13.8 ± 2.3 (range: 10-18) months Magnetic resonance imaging (MRI) and Harris Hip Score (HHS) were used to evaluate muscle degeneration and functional outcome after unilateral THA through a posterolateral approach...
February 22, 2018: Acta Orthopaedica et Traumatologica Turcica
Kyu-Jin Cho, Kyung-Soon Park, Taek-Rim Yoon
PURPOSE: The aim of this study was to evaluate the effectiveness of our technique on further collapse of the femoral head in Association Research Circulation Osseous (ARCO) stage II, patient's functional improvements, and analyze the survival rate of the affected hip. METHODS: Between June 2007 and March 2015, 24 hips diagnosed with osteonecrosis of the femoral head (ONFH) were treated with our muscle pedicle bone grafting (MPBG) technique using anterior one-third of gluteus medius attached to the greater trochanter...
February 24, 2018: International Orthopaedics
Prasanna Sritharan, Yi-Chung Lin, Sara E Richardson, Kay M Crossley, Trevor B Birmingham, Marcus G Pandy
This study quantified the contributions by muscular, gravitational and inertial forces to the ground reaction force (GRF) and external knee adduction moment (EKAM) for knee osteoarthritis (OA) patients and controls walking at similar speeds. Gait data for 39 varus mal-aligned medial knee OA patients and 15 controls were input into musculoskeletal models to calculate the contributions of individual muscles and gravity to the fore-aft (progression), vertical (support), and mediolateral (balance) GRF, and the EKAM...
February 23, 2018: Journal of Orthopaedic Research: Official Publication of the Orthopaedic Research Society
M Zimlitski, L Natchkebia, G Loria, G Zimlitski, V Gvazava, A Gardeev
In this paper, we have studied the difference between classic Watson Jones anterolateral approach and modified anterolateral approach started in our institution from 2004 y. in group of patients with BMI more then 30 - 412 patients, mean age was 66,5 y., male -157 (38.2%), female - 255 (61,8%). Primary diagnosis were: Idiopathic osteoarthritis - 379 (92%), Rheumatoid ostheoarthritis - 16 (4%), DDH - 12 (3%). All surgeries were performed on supine position. All surgeries were performed by single surgeon. In 321 (78%) of cases modified approach was used...
January 2018: Georgian Medical News
Catherine Turner, Sarah Crow, Thomas Crowther, Brittany Keating, Trenton Saupan, Jason Pyfer, Kimberly Vialpando, Szu-Ping Lee
OBJECTIVES: To investigate the effects of dance experience and movement instruction on lower extremity kinematics and muscle activation during a landing task. DESIGN: Cross-sectional case control. SETTING: Laboratory setting. PARTICIPANTS: 27 female subjects (age 18-25) in 2 groups: dancers (n = 12) and non-dancers (n = 15). MAIN OUTCOME MEASURES: Lower extremity biomechanics during drop landing were analyzed...
December 23, 2017: Physical Therapy in Sport
Anita Zacharias, Rodney A Green, Adam Semciw, Daniel J English, Theo Kapakoulakis, Tania Pizzari
INTRODUCTION: Osteoarthritis mainly affects weight-bearing joints such as the hip and knee and is the most common form of arthritis. Greater muscle atrophy with fatty infiltration of gluteal muscles and decreased hip abduction strength has previously been identified with increasing severity of radiological hip OA. However, it is well documented that radiographic findings of OA do not always correlate with clinical severity. The aim of this secondary analysis was to examine whether atrophy and strength of gluteus maximus (GMax), medius (GMed), minimus (GMin), and tensor fascia lata (TFL) is associated with the clinical severity of OA...
February 15, 2018: Clinical Anatomy
Marije Goudriaan, Benjamin R Shuman, Katherine M Steele, Marleen Van den Hauwe, Nathalie Goemans, Guy Molenaers, Kaat Desloovere
Cerebral palsy (CP) and Duchenne muscular dystrophy (DMD) are neuromuscular disorders characterized by muscle weakness. Weakness in CP has neural and non-neural components, whereas in DMD, weakness can be considered as a predominantly non-neural problem. Despite the different underlying causes, weakness is a constraint for the central nervous system when controlling gait. CP demonstrates decreased complexity of motor control during gait from muscle synergy analysis, which is reflected by a higher total variance accounted for by one synergy (tVAF1 )...
2018: Frontiers in Human Neuroscience
Tainã Figueiredo Cardoso, Raquel Quintanilla, Anna Castelló, Rayner González-Prendes, Marcel Amills, Ángela Cánovas
BACKGROUND: The identification of genes differentially expressed in the skeletal muscle of pigs displaying distinct growth and fatness profiles might contribute to identify the genetic factors that influence the phenotypic variation of such traits. So far, the majority of porcine transcriptomic studies have investigated differences in gene expression at a global scale rather than at the mRNA isoform level. In the current work, we have investigated the differential expression of mRNA isoforms in the gluteus medius (GM) muscle of 52 Duroc HIGH (increased backfat thickness, intramuscular fat and saturated and monounsaturated fatty acids contents) and LOW pigs (opposite phenotype, with an increased polyunsaturated fatty acids content)...
February 14, 2018: BMC Genomics
Nader Farahpour, AmirAli Jafarnezhadgero, Paul Allard, Mahdi Majlesi
The objectives of this study were to investigate whether excessive feet pronation alters the joints' kinematics, kinetics and the activity of involved muscles during gait in low back pain patients. METHODS: The lower limb joints' motion, moment and power, as well as the activity of involved muscles during walking were measured in a control group, and two experimental groups including a group with excessive feet pronation only, and another group of low back pain patients with excessive feet pronation...
January 30, 2018: Journal of Electromyography and Kinesiology
Nirav Maniar, Anthony G Schache, Prasanna Sritharan, David A Opar
Anterior cruciate ligament (ACL) injuries are a burdensome condition due to potential surgical requirements and increased risk of long term debilitation. Previous studies indicate that muscle forces play an important role in the development of ligamentous loading, yet these studies have typically used cadaveric models considering only the knee-spanning quadriceps, hamstrings and gastrocnemius muscle groups. Using a musculoskeletal modelling approach, we investigated how lower-limb muscles produce and oppose key tibiofemoral reaction forces and moments during the weight acceptance phase of unanticipated sidestep cutting...
February 6, 2018: Scientific Reports
Juntaro Matsumoto, Toyohiko Isu, Kyongsong Kim, Naotaka Iwamoto, Kazuyoshi Yamazaki, Daijiro Morimoto, Masanori Isobe
INTRODUCTION: Some patients suffer failed back surgery syndrome (FBSS) after lumbar spine surgery. We report the effect of additional treatments for para-lumbar- and peripheral nerve diseases addressing residual symptoms after lumbar spine surgery. MATERIALS AND METHODS: We enrolled 74 patients (59 men and 15 women, mean age 62.9 years) who had undergone lumbar posterior decompression surgery in our department. Mean follow-up after initial lumbar surgery was 26...
January 31, 2018: World Neurosurgery
Jennifer L Livingston, Nicholas M Tavoukjian
The purpose of this study was to investigate the Little League pitching regulations by measuring the change in lower extremity force production after a pitching performance and the subsequent days of rest required for youth baseball pitchers to recover. Bilateral manual muscle testing of the gluteus maximus, hamstrings, gluteus medius, triceps surae, and quadriceps was conducted using a handheld dynamometer. Fifteen healthy, youth baseball pitchers (9.80 ± 1.08 years) threw a submaximal number of pitches and were tested prior to, immediately after, and for the next four consecutive days...
January 29, 2018: Journal of Strength and Conditioning Research
David E Hartigan, Itay Perets, John P Walsh, Benjamin G Domb
This article presents the authors' technique for evaluation of possible abductor tears with magnetic resonance imaging (MRI). By using T2 fat-saturated coronal and axial slices of the hip and T1 coronal images of the pelvis, the authors show how to visualize all tears of the abductor tendons and signs of chronic abductor deficiency. After diagnosis has been made, signs that may help the surgeon determine if open or arthroscopic surgery would be best used are reviewed. Finally, the author reviews indications for a gluteus medius repair with concomitant gluteus maximus reconstruction...
October 2017: Arthroscopy Techniques
Kathleen Kelley, Katherine Slattery, Kaitlyn Apollo
The purpose of this study was to assess electromyographic (EMG) output of the anterior tibialis (TA), medial head of the gastrocnemius (GA), rectus femoris (RF), bicep femoris (BF), and gluteus medius (GM) in experienced yogic practitioners during selected yoga asana. A secondary purpose was to examine the differences in EMG output in unilateral V. bilateral standing yoga asana. The study was a single occasion descriptive design. Thirteen healthy yoga practitioners (1 male, 12 females, average age of 37.5) with more than five years of experience were recruited...
January 2018: Journal of Bodywork and Movement Therapies
J H Schröder, M Geßlein, M Schütz, C Perka, D Krüger
BACKGROUND: Operative refixation is a new therapeutic option in cases of failed conservative treatment for trochanteric pain syndrome (TPS) and lesions of the hip abductors in magnetic resonance imaging (MRI). OBJECTIVE: Evaluation of the clinical and radiological results after open gluteus medius and minimus tendon reconstruction with a double-row technique was carried out. MATERIAL AND METHODS: Patients with failed conservative treatment for TPS and confirmed lesions of the hip abductors in MRI were treated by open hip abductor tendon reconstruction with a double-row technique...
January 11, 2018: Der Orthopäde
Ke-Vin Chang, Wei-Ting Wu, Henry L Lew, Levent Özçakar
Ultrasound has emerged as one of the most utilized tools to diagnose musculoskeletal disorders and to assist in interventions. Traditionally, sonographic examination of the hip joint has been challenging because most of the major structures are deeply situated, thus requiring the use of curvilinear transducer for better penetrance. The posterior lateral hip is a frequent area for musculoskeletal pain and nerve entrapments. Common disorders include greater trochanteric pain syndrome, gluteus medius tendinopathy, piriformis syndrome, pudendal neuralgia and proximal hamstring tendinopathy...
January 11, 2018: American Journal of Physical Medicine & Rehabilitation
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