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Vastus medialis oblique

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https://www.readbyqxmd.com/read/28303844/significance-of-diffusion-tensor-imaging-of-vastus-medialis-oblique-in-recurrent-patellar-dislocation
#1
Li-Si Liu, Zhuo-Zhao Zheng, Hui-Shu Yuan
BACKGROUND: Numerous studies have investigated the influence of osseous factors on patellofemoral joint instability, but research on the influence of dynamic muscle factors in vivo is still in the exploratory stage. This study aimed to use magnetic resonance imaging (MRI) and diffusion tensor imaging (DTI) to evaluate vastus medialis oblique (VMO) fiber bundles in patients with recurrent patellar dislocation to explore the changes in muscle morphology and function. METHODS: This prospective study involved 30 patients (7 males and 23 females; average age, 21...
March 20, 2017: Chinese Medical Journal
https://www.readbyqxmd.com/read/28210036/a-study-on-muscle-activity-and-ratio-of-the-knee-extensor-depending-on-the-types-of-squat-exercise
#2
Jeong-Il Kang, Joon-Su Park, Hyun Choi, Dae-Keun Jeong, Hye-Min Kwon, Young-Jun Moon
[Purpose] For preventing the patellofemoral pain syndrome, this study aims to suggest a proper squat method, which presents selective muscle activity of Vastus Medialis Oblique and muscle activity ratios of Vastus Medialis Oblique/Vastus Lateralis by applying squat that is a representative weight bearing exercise method in various ways depending on the surface conditions and knee bending angles. [Subjects and Methods] An isometric squat that was accompanied by hip adduction, depending on the surface condition and the knee joint flexion angle, was performed by 24 healthy students...
January 2017: Journal of Physical Therapy Science
https://www.readbyqxmd.com/read/28167183/foot-exercise-and-taping-in-patients-with-patellofemoral-pain-and-pronated-foot
#3
Jihyun Lee, Jangwhon Yoon, Heonseock Cynn
This study compared the effect of three foot conditions (untreated, short foot [SF] exercise, and Tape) on knee and ankle muscle activity during forward descending of stairs in subjects with patellofemoral pain syndrome (PFPS) and a pronated foot. Surface electromyography activities in the vastus medialis oblique (VMO), vastus lateralis (VL), and abductor hallucis (AbdH) were recorded during forward descending stairs; Surface electromyography data were expressed as percentages of the maximal voluntary isometric contraction...
January 2017: Journal of Bodywork and Movement Therapies
https://www.readbyqxmd.com/read/28142073/attentional-focusing-instructions-influence-quadriceps-activity-characteristics-but-not-force-production-during-isokinetic-knee-extensions
#4
David C Marchant, Matt Greig
The attentional focus emphasised in verbal instruction influences movement and muscle recruitment characteristics, with an external focus (onto movement effects) typically benefiting performance. However, contrasting findings suggest either a selective isolation or spreading activation effect on associated muscles as a result of internally focused instruction (movement characteristics). In the present experiment, participants completed maximal isokinetic concentric leg extension exercise using internally (muscle specific: vastus medialis oblique) or externally (outcome specific) focused instructions...
January 27, 2017: Human Movement Science
https://www.readbyqxmd.com/read/28137523/difference-in-muscle-activation-patterns-during-high-speed-versus-standard-speed-yoga-a-randomized-sequence-crossover-study
#5
Melanie Potiaumpai, Maria Carolina Massoni Martins, Claudia Wong, Trusha Desai, Roberto Rodriguez, Kiersten Mooney, Joseph F Signorile
OBJECTIVES: To compare the difference in muscle activation between high-speed yoga and standard-speed yoga and to compare muscle activation of the transitions between poses and the held phases of a yoga pose. DESIGN: Randomized sequence crossover trial SETTING: A laboratory of neuromuscular research and active aging Interventions: Eight minutes of continuous Sun Salutation B was performed, at a high speed versus a standard-speed, separately. Electromyography was used to quantify normalized muscle activation patterns of eight upper and lower body muscles (pectoralis major, medial deltoids, lateral head of the triceps, middle fibers of the trapezius, vastus medialis, medial gastrocnemius, thoracic extensor spinae, and external obliques) during the high-speed and standard-speed yoga protocols...
February 2017: Complementary Therapies in Medicine
https://www.readbyqxmd.com/read/28129279/myoeletric-activity-of-the-quadriceps-during-leg-press-exercise-performed-with-differing-techniques
#6
Wallace Machado, Gabriel Paz, Leonardo Mendes, Marianna Maia, Jason B Winchester, Vicente Lima, Jeffrey M Willardson, Humberto Miranda
Machado, W, Paz, G, Mendes, L, Maia, M, Winchester, JB, Lima, V, Willardson, JM, and Miranda, H. Myoeletric activity of the quadriceps during leg press exercise performed with differing techniques. J Strength Cond Res 31(2): 422-429, 2017-The quadriceps muscle supplies the motive force for dynamic knee extension. During this action, the vastus medialis oblique (VMO) and vastus lateralis (VL) co-contract to stabilize the patella as it tracks within the patellofemoral groove. The purpose of this study was to analyze surface electromyographic (SEMG) responses for the VL, VMO, rectus femoris (RF), and biceps femoris (BF), as well as the VMO:VL ratio during an open-kinetic chain 45° angled leg press (LP45)...
February 2017: Journal of Strength and Conditioning Research
https://www.readbyqxmd.com/read/28027463/quantifying-knee-mechanics-during-balance-training-exercises
#7
Lauren C Benson, Thomas G Almonroeder, Kristian M O'Connor
Patellofemoral pain (PFP) is common among runners and those recovering from anterior cruciate ligament reconstruction. Training programs designed to prevent or treat injuries often include balance training, although balance interventions have been reported to coincide with more knee injuries. Knowledge of the effect of balance exercises on knee mechanics may be useful when designing training programs. High knee abduction moment has been implicated in the development of PFP, and imbalance between vastus lateralis (VL) and vastus medialis oblique (VMO) may contribute to patellofemoral stress...
January 2017: Human Movement Science
https://www.readbyqxmd.com/read/27846435/muscle-activation-patterns-of-the-lumbo-pelvic-hip-complex-during-walking-gait-before-and-after-exercise
#8
Mihyang Chang, Lindsay V Slater, Revay O Corbett, Joseph M Hart, Jay Hertel
The lumbo-pelvic-hip core complex consists of musculoskeletal structures that stabilize the spine and pelvis, however fatigue may affect muscle recruitment, active muscle stiffness and trunk kinematics, compromising trunk stability. The purpose of this study was to compare trunk muscle activation patterns, and trunk and lower extremity kinematics during walking gait before and after exercise. Surface electrodes were placed over the rectus abdominis, external oblique, erector spinae, gluteus medius, vastus lateralis, and vastus medialis of twenty-five healthy inidviduals...
November 9, 2016: Gait & Posture
https://www.readbyqxmd.com/read/27826404/the-activation-pattern-of-trunk-and-lower-limb-muscles-in-an-electromyographic-assessment-comparison-between-ground-and-treadmill-walking
#9
Reza Mazaheri, Mohammad Ali Sanjari, Gelareh Radmehr, Farzin Halabchi, Hooman Angoorani
BACKGROUND: Due to biomechanical differences, various patterns of muscle contraction are expected to occur while walking over ground versus when walking on a treadmill. OBJECTIVES: This study aimed to compare amplitude and duration of activation of selected trunk and lower extremity muscles during over-ground and treadmill walking. MATERIALS AND METHODS: Through a simple sampling method, 19 sedentary healthy men within the age range of 20 - 40 were selected...
September 2016: Asian Journal of Sports Medicine
https://www.readbyqxmd.com/read/27821928/the-effect-of-gluteus-medius-strengthening-on-the-knee-joint-function-score-and-pain-in-meniscal-surgery-patients
#10
Eun-Kyung Kim
[Purpose] The purpose of this study was to analyze the effect of gluteus medius activity strengthening due to squat with isometric hip adduction and hip abduction in side-lying exercise on knee joint function index and pain in meniscal surgery patients. [Subjects and Methods] This study selected sample of 26 patients who had meniscal surgery more than 4 weeks ago. The patients were divided into squat with isometric hip adduction exercise group I (n=8), hip abduction in side-lying exercise group II (n=9), and combined exercise group III...
October 2016: Journal of Physical Therapy Science
https://www.readbyqxmd.com/read/27706260/comparison-of-two-different-modes-of-active-recovery-on-muscles-performance-after-fatiguing-exercise-in-mountain-canoeist-and-football-players
#11
Anna Mika, Łukasz Oleksy, Renata Kielnar, Ewa Wodka-Natkaniec, Magdalena Twardowska, Kamil Kamiński, Zbigniew Małek
BACKGROUND: The aim of this study is to assess if the application of different methods of active recovery (working the same or different muscle groups from those which were active during fatiguing exercise) results in significant differences in muscle performance and if the efficiency of the active recovery method is dependent upon the specific sport activity (training loads). DESIGN: A parallel group non-blinded trial with repeated measurements. METHODS: Thirteen mountain canoeists and twelve football players participated in this study...
2016: PloS One
https://www.readbyqxmd.com/read/27626368/surgical-versus-nonsurgical-treatments-of-acute-primary-patellar-dislocation-with-special-emphasis-on-the-mpfl-injury-patterns
#12
Gang Ji, Shengjie Wang, Xiaomeng Wang, Junhang Liu, Jinghui Niu, Fei Wang
The objective of the present study was to compare the clinical results of the surgical versus nonsurgical treatments of acute primary patellar dislocations with a medial patellofemoral ligament (MPFL) injury in the nonoverlap region with the vastus medialis oblique. In this study, 62 patients with an acute patellar dislocation and a concurrent MPFL injury in the nonoverlap region were randomly divided into two groups based on their birth years (even vs. odd years) and received either surgical or nonsurgical treatment...
September 14, 2016: Journal of Knee Surgery
https://www.readbyqxmd.com/read/27451322/leg-and-trunk-muscle-coordination-and-postural-sway-during-increasingly-difficult-standing-balance-tasks-in-young-and-older-adults
#13
Lars Donath, Eduard Kurz, Ralf Roth, Lukas Zahner, Oliver Faude
Ageing impairs body balance and increases older adults' fall risk. Balance training can improve intrinsic fall risk factors. However, age comparisons of muscle activity responses during balance tasks are lacking. This study investigated relative muscle activity, muscle coordination and postural sway during various recommended static balance training tasks. Muscle activity (%MVC), amplitude ratios (AR) and co-activity (CAI) were determined during standing tasks for 30s (1: double limb stance on a foam surface, eyes open; 2: double limb stance on firm ground, eyes closed; 3: double limb stance, feet in step position on a foam surface, eyes open; 4: double limb stance, feet in step position on firm ground, eyes closed; 5: single limb stance on firm ground, eyes open) in 20 healthy young adults (24±2 y) and 20 older adults (73±6 y)...
September 2016: Maturitas
https://www.readbyqxmd.com/read/27274428/physical-therapy-intervention-for-medial-patellofemoral-ligament-reconstruction-after-repeated-lateral-patellar-subluxation-dislocation
#14
Teresa Errigo Vitale, Brianne Mooney, Ashley Vitale, Demitra Apergis, Stephen Wirth, Mark G Grossman
BACKGROUND: The incidence of patellar subluxation or dislocation has been documented up to 43/100,000 with females more prevalent then males. There are many contributing factors involving the hip, knee, and ankle that lead to patellar subluxation. A patellar position of lateral tilt with lateral glide may indicate weakness of the vastus medialis oblique (VMO) and adductors, increased tightness in the iliotibial band, and overpowering of the vastus lateralis. Patella alta can predispose an individual to lateral dislocation due to the patella placement outside of the femoral trochlear groove with a disadvantage of boney stability...
June 2016: International Journal of Sports Physical Therapy
https://www.readbyqxmd.com/read/27264398/effect-of-gait-retraining-for-reducing-ambulatory-knee-load-on-trunk-biomechanics-and-trunk-muscle-activity
#15
Corina Nüesch, Dominik Laffer, Cordula Netzer, Geert Pagenstert, Annegret Mündermann
The purpose of this study was to test the hypothesis that walking with increased medio-lateral trunk sway is associated with lower external knee adduction moment and lower extremity muscle activation, and higher external ipsilateral trunk moment and trunk muscle activity than walking with normal trunk sway in healthy participants. Fifteen participants performed walking trials with normal and increased medio-lateral trunk sway. Maximum trunk sway, first maximum knee adduction moment, lateral trunk bending moment, and bilateral vastus medialis, vastus lateralis, gluteus medius, rectus abdominis, external oblique and erector spinae muscle activity were computed...
June 2016: Gait & Posture
https://www.readbyqxmd.com/read/27134414/analysis-of-vastus-lateralis-and-vastus-medialis-oblique-muscle-activation-during-squat-exercise-with-and-without-a-variety-of-tools-in-normal-adults
#16
Tae-Kyung Lee, So-Mi Park, Sae-Bom Yun, Ae-Ran Lee, Yun-Seob Lee, Min-Sik Yong
[Purpose] The present study investigated the effects of squat exercises with and without a variety of tools including a gym ball, wedge, and elastic band on the vastus lateralis and vastus medialis oblique muscles. [Subjects and Methods] A total of twenty healthy subjects with no history of neurological, musculoskeletal injury, or pain in the lower extremities were recruited. All subjects performed four types of exercise (conventional squat exercise, squat exercise with a gym ball, squat exercise with a wedge, squat exercise with an elastic band)...
March 2016: Journal of Physical Therapy Science
https://www.readbyqxmd.com/read/26967547/immediate-effect-of-patterned-electrical-neuromuscular-stimulation-on-pain-and-muscle-activation-in-individuals-with-patellofemoral-pain
#17
RANDOMIZED CONTROLLED TRIAL
Neal R Glaviano, Susan A Saliba
CONTEXT: For individuals with patellofemoral pain (PFP), altered muscle activity and pain are common during functional tasks. Clinicians often seek interventions to improve muscle activity and reduce impairments. One intervention that has not been examined in great detail is electrical stimulation. OBJECTIVE: To determine whether a single patterned electrical neuromuscular stimulation (PENS) treatment would alter muscle activity and pain in individuals with PFP during 2 functional tasks, a single-legged squat and a lateral step down...
February 2016: Journal of Athletic Training
https://www.readbyqxmd.com/read/26940378/the-effect-of-exercise-on-vastus-medialis-oblique-muscle-architecture-an-ultrasound-investigation
#18
M Khoshkhoo, A Killingback, C J Robertson, P J Adds
The vastus medialis oblique (VMO) is thought to be implicated in patellofemoral pain (PFP), and weakness in this portion of the vastus medialis muscle may lead to PFP. Management includes physiotherapy to strengthen the VMO. Although this intervention has been shown to be effective, the effects on the architecture of the muscle have not been investigated. This study aims to determine the changes in VMO architecture following a program of strengthening exercises. Twenty-one male participants underwent an initial ultrasound scan to measure the fiber angle and the insertion level of the VMO on the patella...
September 2016: Clinical Anatomy
https://www.readbyqxmd.com/read/26903215/the-effect-of-the-mulligan-knee-taping-technique-on-patellofemoral-pain-and-lower-limb-biomechanics
#19
Anne Hickey, Diana Hopper, Toby Hall, Catherine Y Wild
BACKGROUND: Patellofemoral pain (PFP) affects 25% of the general population, occurring 2 times more often in females compared with males. Taping is a valuable component of the management plan for altering lower limb biomechanics and providing pain relief; however, the effects of alternative taping techniques, such as Mulligan knee taping, appear yet to be researched. PURPOSE: To determine whether the Mulligan knee taping technique altered levels of perceived knee pain and lower limb biomechanics during a single-legged squat (SLSq) in adult females with PFP...
May 2016: American Journal of Sports Medicine
https://www.readbyqxmd.com/read/26834316/effects-of-neuromuscular-training-on-knee-joint-stability-after-anterior-cruciate-ligament-reconstruction
#20
Jae-Kwang Shim, Ho-Suk Choi, Jun-Ho Shin
[Purpose] This study examined the effects of neuromuscular training on knee joint stability after anterior cruciate ligament reconstruction. [Subjects and Methods] The subjects were 16 adults who underwent arthroscopic anterior cruciate reconstruction and neuromuscular training. The Lysholm scale was used to assess functional disorders on the affected knee joint. A KT-2000 arthrometer was used to measure anterior displacement of the tibia against the femur. Surface electromyography was used to detect the muscle activation of the vastus medialis oblique, vastus lateralis, biceps femoris, and semitendinosus before and after neuromuscular training...
December 2015: Journal of Physical Therapy Science
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