4,403 results match your criteria Quadriceps Injury

Psychosocial factors 3-months after anterior cruciate ligament reconstruction predict 6-month subjective and objective knee outcomes.

J Orthop Res 2021 Jun 22. Epub 2021 Jun 22.

Department of Physical Therapy, College of Health Sciences, University of Kentucky, Lexington, Kentucky, USA.

The objective of the study was to determine if psychological readiness for sport and knee self-efficacy assessed early (3 months) after anterior cruciate ligament reconstruction (ACLR) are predictive of self-reported functional outcomes, quadriceps strength, and knee mechanics while running at the time of return to sport training (6 months). Thirty athletes with unilateral ACLR completed the ACL Return to Sport after Injury (ACL-RSI) and Knee Self-Efficacy Scale (K-SES) 3 months after ACLR and completed self-reported functional outcomes, isometric quadriceps strength testing, and three-dimensional running gait analysis 6 months after ACLR. The 3-month ACL-RSI significantly correlated with the 6-month International Knee Documentation Committee (IKDC; r = 0. Read More

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[Proximal avulsion of the rectus femoris muscle].

W Linhart C Neetz

Unfallchirurg 2021 Jun 22. Epub 2021 Jun 22.

Klinik für Unfallchirurgie und Orthopädie, Handchirurgie, Klinikum am Gesundbrunnen, SLK-Kliniken Heilbronn GmbH, Am Gesundbrunnen 20-26, 74078, Heilbronn, Deutschland.

Background: Injuries of the thigh muscles are among the most frequent sports injuries. For example, in soccer they represent nearly 30% of all injuries. The rectus femoris muscle is particularly exposed to injury due to its anatomical features. Read More

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Adductor magnus muscle transfer to restore knee extension: Anatomical studies and clinical applications.

J Plast Reconstr Aesthet Surg 2021 Apr 8. Epub 2021 Apr 8.

Division of Plastic Surgery, Department of Surgery, Washington University School of Medicine, 660 South Euclid Avenue, Campus Box 8238, St. Louis, MO, USA. Electronic address:

Background: Loss of knee extension causes significant impairment. Though nerve-based reconstruction is preferable in cases of femoral nerve palsy or injury, these surgeries are not always appropriate if the pathology involves the quadriceps muscles or presentation too late for muscle reinnervation. Muscle transfers are another option that has been underutilized in the lower extremity. Read More

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[Indirect reduction technique via Nice knot for transverse fracture of patella].

Zhongguo Xiu Fu Chong Jian Wai Ke Za Zhi 2021 Jun;35(6):710-715

Fujian Orthopaedics Research Institute, Department of Orthopaedic Trauma, the First Affiliated Hospital of Fujian Medical University, Fuzhou Fujian, 350005, P.R.China.

Objective: To assess the outcomes in indirect reduction technique via Nice knot for transverse patellar fractures.

Methods: The clinical data of 25 patients with transverse patellar fractures meeting the inclusion criteria between January 2017 and December 2018 were retrospectively analyzed. The patients were divided into trial group ( =13) and control group ( =12) according to different intraoperative reduction methods. Read More

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Medial Patellofemoral Ligament Reconstruction Using a Quadriceps Tendon Autograft in a Patient with Open Physes.

Arthrosc Tech 2021 May 12;10(5):e1281-e1286. Epub 2021 Apr 12.

Twin Cities Orthopedics. Edina-Crosstown, Edina, Minnesota.

Recurrent patellar dislocations are correlated with an elevated risk for further patellar dislocations. Chronic patellar instability is a disabling issue for some patients and may require surgical intervention for proper treatment. Risk factors for recurrent dislocations include medial patellofemoral ligament (MPFL) tears, patella alta, trochlear dysplasia, and increased tibial tubercle to trochlear groove distance. Read More

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Predicting ACL Reinjury from Return to Activity Assessments at 6-months Post-Surgery: A Prospective Cohort Study.

J Athl Train 2021 Jun 15. Epub 2021 Jun 15.

Department of Kinesiology. University of Virginia, Charlottesville, VA.

Context: Return to activity(RTA) assessments are commonly administered following ACL-Reconstruction(ACLR) to manage post-operative progressions back to activity. To date, there is little knowledge on the clinical utility of these assessments to predict patient outcomes such as secondary ACL injury once returned to activity.

Objective: To identify what measures of patient function at 6-months post-ACLR best predict return to activity and second ACL injury at a minimum of 2-years following ACLR. Read More

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Reduction of Neglected Displaced Fractures of the Distal Femoral Physis.

JBJS Essent Surg Tech 2021 Jan-Mar;11(1). Epub 2021 Mar 2.

Université Nazi Boni, Bobo-Dioulasso, Burkina Faso.

Background: We performed open osteoclasis, soft-tissue release, and fracture fragment reduction and fixation to treat 10 cases of neglected physeal fractures of the distal aspect of the femur with severe deformity. To our knowledge, no specific surgical procedure for this problem has been reported in the literature.

Description: The procedure is typically performed through an extensile anterolateral approach. Read More

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Twelve-Week Quadriceps Strength as A Predictor of Quadriceps Strength At Time Of Return To Sport Testing Following Bone-Patellar Tendon-Bone Autograft Anterior Cruciate Ligament Reconstruction.

Int J Sports Phys Ther 2021 Jun 2;16(3):681-688. Epub 2021 Jun 2.

Northwestern University.

Background: Restoration of quadriceps strength following anterior cruciate ligament reconstruction (ACL-R) continues to challenge both patients and clinicians. Failure to adequately restore quadriceps strength has been linked to decreased patients' self-reported outcomes and an increased risk for re-injury. Early identification of quadriceps strength deficits may assist in tailoring early interventions to better address impairments. Read More

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Assessment of Muscle Volume Using Magnetic Resonance Imaging (MRI) in Football Players after Hamstring Injuries.

Eur J Sport Sci 2021 Jun 10:1-17. Epub 2021 Jun 10.

Institute for Diagnostic and Interventional Radiology, Goethe University Frankfurt, Frankfurt am Main, Germany.

Muscle injuries of the hamstrings are among the most frequent in football and a main cause for significant time away from training and competition. The purpose of this study was to prospectively evaluate the loss of muscle volume in recreational football players three and six weeks after initial trauma. We hypothesized that significant muscle volume loss occurs within 6 weeks after the initial injury event. Read More

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The outcomes of quadriceps tendon autograft for anterior cruciate ligament reconstruction in adolescent athletes: a retrospective case series.

Eur J Orthop Surg Traumatol 2021 Jun 10. Epub 2021 Jun 10.

Department of Orthopaedics, Penn State Health Milton S. Hershey Medical Center, 500 University Dr., 414 Hallmark South, Hershey, PA, 17033, USA.

Background: Multiple graft options exist for anterior cruciate ligament (ACL) reconstruction in an adolescent athlete. Patellar tendon harvest can lead to anterior knee pain, while hamstring tendon harvest can affect knee flexion strength and alter mechanics. Allograft is less desirable in pediatric patients due to the higher failure rate and slight risk of disease transmission. Read More

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Distinct patterns of spasticity and corticospinal connectivity following complete spinal cord injury.

J Physiol 2021 Jun 9. Epub 2021 Jun 9.

Shirley Ryan AbilityLab, Chicago, Illinois, 60611.

Key Points: Damage to corticospinal axons have implications for the development of spasticity following spinal cord injury (SCI). Here, we examined to which extent residual corticospinal connections and spasticity are present in muscles below the injury (quadriceps femoris and soleus) in humans with motor complete thoracic SCI. We found three distinct sub-groups of people: participants with spasticity and corticospinal responses in the quadriceps femoris and soleus, participants with spasticity and corticospinal responses in the quadriceps femoris only, and participants with no spasticity or corticospinal responses in either muscle. Read More

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Graft Failure, Revision ACLR, and Reoperation Rates After ACLR With Quadriceps Tendon Versus Hamstring Tendon Autografts: A Registry Study With Review of 475 Patients.

Am J Sports Med 2021 Jun 8:3635465211015172. Epub 2021 Jun 8.

Sports Orthopedic Research Center-Copenhagen (SORC-C), Department of Orthopedic Surgery, Copenhagen University Hospital Amager-Hvidovre, Denmark.

Background: It has been indicated that anterior cruciate ligament reconstruction (ACLR) with a quadriceps tendon (QT) graft has a higher risk of revision compared with ACLR performed with a hamstring tendon (HT) graft.

Purpose/hypothesis: To investigate whether ACLR with QT graft had a higher risk of graft failure, revision ACLR, or reoperation compared with HT graft in a high-volume center. We hypothesized that there would be no between-group differences. Read More

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The anatomical, electrophysiological and histological observations of muscle contraction units in rabbits: a new perspective on nerve injury and regeneration.

Neural Regen Res 2022 Jan;17(1):228-232

Department of Trauma and Orthopedics, Peking University People's Hospital; Key Laboratory of Trauma and Neural Regeneration (Peking University), Ministry of Education; Trauma Center, Peking University People's Hospital; National Trauma Medical Center, Beijing, China.

In the conventional view a muscle is composed of intermediate structures before its further division into microscopic muscle fibers. Our experiments in mice have confirmed this intermediate structure is composed of the lamella cluster formed by motor endplates, the innervating nerve branches and the corresponding muscle fibers, which can be viewed as an independent structural and functional unit. In this study, we verified the presence of these muscle construction units in rabbits. Read More

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January 2022

Measuring the force perception in knee flexor/ extensor muscles in patients with anterior cruciate ligament injury and healthy subjects.

J Back Musculoskelet Rehabil 2021 Jun 4. Epub 2021 Jun 4.

Physiotherapy Department, Faculty of Rehabilitation Sciences, Tabriz University of Medical Sciences, Tabriz, Iran.

Background: Force perception as a contributor to the neuromuscular control of the knee joint may be altered after anterior cruciate ligament (ACL) injury.

Objective: This study aimed to compare the force perception accuracy in the knee joints of patients with ACL injury and healthy subjects.

Methods: Twenty-six patients with ACL injury and 26 healthy subjects participated in this case-control study. Read More

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Effect of Neuromuscular Exercises on Strength, Proprioceptive Receptors, and Balance in Females with Multiple Sclerosis.

Int J Prev Med 2021 19;12. Epub 2021 Jan 19.

Department of Sport Management, Faculty of Management, Farabi Campus, University of Tehran, Iran.

Background: Multiple sclerosis (MS) is the third most common cause of adult neurologic disabilities. The aim of this study was to determine the effect of 8 weeks of neuromuscular exercises on strength, proprioceptive receptors, and balance of women with MS.

Methods: In this randomized controlled trial study, 20 female volunteers with relapsing-remitting MS were randomly assigned into the experimental group ( = 10) and control group ( = 10). Read More

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January 2021

Anterior cruciate ligament injury in elite football players: video analysis of 128 cases.

J Sports Med Phys Fitness 2021 Jun 1. Epub 2021 Jun 1.

Orthopaedic unit and Kirk Kilgour Sports injury Center, S. Andrea Hospital, University of Rome Sapienza, Rome, Italy.

Purpose: The purpose of this study is to evaluate with video analysis the circumstances and the mechanism leading to ACL injury in a high-level population of athletes participating in the main European football championships.

Methods: Video analysis of 128 competitive matches with ACL injury events was performed through Wyscout.com® from August 2009 to January 2020. Read More

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Closed reduction in the treatment of tibial tubercle fractures.

Injury 2021 Jun 17;52(6):1336-1340. Epub 2020 Oct 17.

University of Alabama at Birmingham, Department of Orthopedic Surgery, AL, USA; Children's Hospital of Alabama, Department of Pediatric Orthopaedics, AL, USA. Electronic address:

Introduction: Open reduction and internal fixation (ORIF) is considered the standard care for displaced tibial tubercle fractures, but closed reduction and internal fixation (CRIF) can also be successful. Our aim was to compare outcomes between ORIF and CRIF for tibial tubercle fractures.

Materials And Methods: Children younger than 18 years presenting for a tibial tubercle fracture at a single institution. Read More

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Effects of a Vibrating Foam Roller on Ipsilateral and Contralateral Neuromuscular Function and the Hamstrings-to-Quadriceps Ratios.

Int J Exerc Sci 2021 1;14(1):304-323. Epub 2021 Apr 1.

Exercise Physiology Laboratory, Department of Kinesiology, California State University, Fullerton, CA, USA.

The effects of vibrating foam rolling the hamstrings on range of motion (ROM), hamstrings-to-quadriceps (H:Q) ratios, muscle activation, and peak torque (PT) of the quadriceps and hamstrings have yet to be extensively studied. The aim of this study was to investigate the effects of a vibrating foam roller on the hamstrings. Fifteen resistance trained women (mean age ± SD = 22. Read More

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Mechanics of cadaveric anterior cruciate ligament reconstructions during simulated jump landing tasks: Lessons learned from a pilot investigation.

Clin Biomech (Bristol, Avon) 2021 Jun 12;86:105372. Epub 2021 May 12.

Department of Orthopedic Surgery, Mayo Clinic, Rochester, MN, USA; Department of Biomedical Engineering and Physiology, Mayo Clinic, Rochester, MN, USA; Sports Medicine Center, Mayo Clinic, Rochester, MN, USA. Electronic address:

Background: Around half of anterior cruciate ligament (ACL) injuries are treated through reconstruction, but the literature lacks mechanical investigation of reconstructions in a dynamic athletic task and rupture environment. The current objective was to ascertain the feasibility of investigating ACL reconstructions in a rupture environment during simulated landing tasks in a validated mechanical impact simulator.

Methods: Four cadaveric lower extremities were subjected to simulated landing in a mechanical impact simulator. Read More

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Early knee status affects self-reported knee function 1 year after non-surgically treated anterior cruciate ligament injury.

Phys Ther Sport 2021 Jul 23;50:173-183. Epub 2021 May 23.

Unit of Physiotherapy, Department of Health, Medicine and Caring Sciences, Linköping University, Linköping, Sweden; Center for Medical Image Science and Visualization (CMIV), Department of Health, Medicine and Caring Sciences, Linköping University, Sweden.

Objectives: The primary aim was to assess impact of early knee status on self-reported knee function at 3 and 12 months and on quadriceps strength at 12 months after non-surgically treated ACL injury. The secondary aim was to describe the recovery of muscle strength during the first year after the injury.

Design: Prospective cohort study. Read More

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Sex influences the relationship between hamstrings-to-quadriceps strength imbalance and co-activation during walking gait.

Gait Posture 2021 May 21;88:138-145. Epub 2021 May 21.

Athletic Training Program, School of Exercise and Rehabilitation Sciences, University of Toledo, Toledo, OH, USA. Electronic address:

Background: While traditionally viewed as a beneficial adaptation to preserve stability in the presence of knee pathology, excessive muscle co-activation may be detrimental for joint health when extrapolated to repetitive movement patterns over time. Lesser hamstrings strength relative to the quadriceps (low H:Q strength ratio) may influence neuromuscular patterns about the knee, as it is reported to increase risk for lower extremity injury among healthy females.

Research Question: Does the relationship between H:Q strength ratio and H:Q co-activation differ between sexes during walking and jogging?

Methods: We used a descriptive laboratory study to assess hamstrings and quadriceps strength and muscle activity patterns during the loading response of treadmill walking gait (1. Read More

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Use of Tensiomyography in Evaluating Sex-Based Differences in Resistance-Trained Individuals After Plyometric and Isometric Midthigh Pull Postactivation Potentiation Protocols.

J Strength Cond Res 2021 Jun;35(6):1527-1534

Physiology of Work and Exercise Response (POWER) Laboratory, Institute of Exercise Physiology and Rehabilitation Science, University of Central Florida, Orlando, Florida; and.

Abstract: Herring, CH, Goldstein, ER, and Fukuda, DH. Use of tensiomyography in evaluating sex-based differences in resistance-trained individuals after plyometric and isometric midthigh pull postactivation potentiation protocols. J Strength Cond Res 35(6): 1527-1534, 2021-The purposes of this study were to determine if there are sex-based differences in muscular contractile properties as measured by tensiomyography (TMG) and to determine if plyometrics or the isometric midthigh pull are effective methods of eliciting postactivation potentiation (PAP). Read More

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Quantitative sonographic assessment of quadriceps muscle thickness for fall injury prediction in patients undergoing maintenance hemodialysis: an observational cohort study.

BMC Nephrol 2021 May 22;22(1):191. Epub 2021 May 22.

Kodaira Kitaguchi Clinic, Tokyo, Japan.

Background: Accidental fall risk is high in patients undergoing maintenance hemodialysis. Falls are associated with fatal injury, comorbidities, and mortality. Risk assessment should be a primary component of fall prevention. Read More

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Comparison of hamstring and quadriceps tendon autografts in anterior cruciate ligament reconstruction with gait analysis and surface electromyography.

J Orthop Traumatol 2021 May 21;22(1):20. Epub 2021 May 21.

Clinic for Orthopedics and Trauma Surgery, University Medical Center Schleswig Holstein UKSH Campus Luebeck, Ratzeburger Allee 160, 23538, Luebeck, Germany.

Background: Anterior cruciate ligament (ACL) tear is the most frequent ligamentous injury of the knee joint. Autografts of hamstring (HS) or quadriceps tendons (QT) are used for primary ACL reconstruction. In this study, we planned to examine whether harvesting an HS graft is related to a deficit in dynamic knee stabilisation and strength revealed by dynamic valgus as compared with QT graft or the uninjured leg. Read More

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Effects of neuromuscular training on knee proprioception in individuals with anterior cruciate ligament injury: a systematic review and GRADE evidence synthesis.

BMJ Open 2021 05 18;11(5):e049226. Epub 2021 May 18.

Department of Community Medicine and Rehabilitation - Physiotherapy Section, Umeå University, Umeå, Sweden

Objective: To systematically review and summarise the evidence for the effects of neuromuscular training compared with any other therapy (conventional training/sham) on knee proprioception following anterior cruciate ligament (ACL) injury.

Design: Systematic Review.

Data Sources: PubMed, CINAHL, SPORTDiscus, AMED, Scopus and Physical Education Index were searched from inception to February 2020. Read More

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Comparison of hamstring and quadriceps strength after anatomical versus non-anatomical anterior cruciate ligament reconstruction: a retrospective cohort study.

BMC Musculoskelet Disord 2021 May 18;22(1):452. Epub 2021 May 18.

Department of Orthopedic Surgery, Guangdong Provincial People's Hospital, Guangdong Academy of Medical Sciences, NO. 106, Zhongshan 2nd Road, 510000, Guangzhou, China.

Background: Strength recovery of injured knee is an important parameter for patients who want to return to sport after anterior cruciate ligament reconstruction (ACLR). Comparison of muscle strength between anatomical and non-anatomical ACLR has not been reported.

Purpose: To evaluate the difference between anatomical and non-anatomical single-bundle ACLR in hamstring and quadriceps strength and clinical outcomes. Read More

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Clinical, Functional, and Physical Activity Outcomes 5 Years Following the Treatment Algorithm of the Delaware-Oslo ACL Cohort Study.

J Bone Joint Surg Am 2021 May 17. Epub 2021 May 17.

Department of Sports Medicine, Norwegian School of Sport Sciences, Oslo, Norway.

Background: Anterior cruciate ligament (ACL) injuries can be treated with or without ACL reconstruction (ACLR), and more high-quality studies evaluating outcomes after the different treatment courses are needed. The purpose of the present study was to describe and compare 5-year clinical, functional, and physical activity outcomes for patients who followed our decision-making and treatment algorithm and chose (1) early ACLR with preoperative and postoperative rehabilitation, (2) delayed ACLR with preoperative and postoperative rehabilitation, or (3) progressive rehabilitation alone. Early ACLR was defined as that performed ≤6 months after the preoperative rehabilitation program, and late ACLR was defined as that performed >6 months after the preoperative rehabilitation program. Read More

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Incidence and Risk Factors for Residual High-Grade Pivot Shift After ACL Reconstruction With or Without a Lateral Extra-articular Tenodesis.

Orthop J Sports Med 2021 May 7;9(5):23259671211003590. Epub 2021 May 7.

Institute of Movement and Locomotion, Department of Orthopedics and Traumatology, St Marguerite Hospital, Marseille, France.

Background: Residual rotatory knee laxity at midterm follow-up after isolated anterior cruciate ligament reconstruction (ACLR) versus ACLR with lateral extra-articular tenodesis (LET) remains an issue.

Purpose/hypothesis: To evaluate the outcomes of ACLR with or without additional LET at a minimum 2-year follow-up in patients with preoperative high-grade pivot shift (PS). Our hypothesis was that the addition of LET would decrease the risk of secondary meniscal injury and the presence of residual high-grade PS at follow-up. Read More

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On a Trajectory for Success-9 in Every 10 People With a Degenerative Meniscus Tear Have Improved Knee Function Within 2 Years After Treatment: A Secondary Exploratory Analysis of a Randomized Controlled Trial.

J Orthop Sports Phys Ther 2021 06 10;51(6):289-297. Epub 2021 May 10.

Objective: To identify trajectories of patient-reported knee function over 5 years in patients with degenerative meniscal tears, and to explore whether baseline characteristics were associated with trajectories of sport and recreational function.

Design: Prospective cohort study.

Methods: We conducted a secondary exploratory analysis of the Odense-Oslo Meniscectomy Versus Exercise randomized controlled trial. Read More

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Recent Injury, Severe Radiographic Change, and Lower Quadriceps Strength Increase Risk of Knee Pain Exacerbation During Walking: A Within-Person Knee-Matched Study.

J Orthop Sports Phys Ther 2021 06 10;51(6):298-304. Epub 2021 May 10.

Objective: To examine the associations of knee injury, radiographic osteoarthritis severity, and quadriceps strength with knee pain exacerbation during walking.

Design: Within-person knee-matched case-control study.

Methods: Participants from the Osteoarthritis Initiative who completed a 20-m walking test at the 24-month visit were included. Read More

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