3,720 results match your criteria Quadriceps Injury


EFFICACY OF PERTURBATION-ENHANCED NEUROMUSCULAR TRAINING ON HAMSTRING AND QUADRICEPS ONSET TIME, ACTIVATION AND KNEE FLEXION DURING A TUCK-JUMP TASK.

Int J Sports Phys Ther 2019 Apr;14(2):214-227

Department of Physical Education and Sports Sciences, Karaj Branch, Islamic Azad University, Karaj, Iran.

Background: Deficits in dynamic neuromuscular control of the knee may contribute to the higher incidence of the anterior cruciate ligament (ACL), specifically in female athletes. Little is known about the effects of preventive training programs on muscle onset time and activation during functional tasks.

Purpose: The purpose of this study was to evaluate the efficacy of perturbation-enhanced neuromuscular training on hamstring and quadriceps onset time and activation, and knee flexion angle in female athletes with quadriceps dominance (QD) deficit during a tuck-jump (TJ) task. Read More

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http://www.ncbi.nlm.nih.gov/pmc/articles/PMC6449013PMC

Anterior Cruciate Ligament Tear Promotes Skeletal Muscle Myostatin Expression, Fibrogenic Cell Expansion, and a Decline in Muscle Quality.

Am J Sports Med 2019 Apr 17:363546519832864. Epub 2019 Apr 17.

Department of Nutrition and Metabolism, University of Texas Medical Branch, Galveston, Texas, USA.

Background: Anterior cruciate ligament (ACL) tears result in significant quadriceps muscle atrophy that is resistant to recovery despite extensive rehabilitation. Recent work suggests an elevated fibrotic burden in the quadriceps muscle after the injury, which may limit recovery. Elucidating the mechanisms and cell types involved in the progression of fibrosis is critical for developing new treatment strategies. Read More

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http://dx.doi.org/10.1177/0363546519832864DOI Listing
April 2019
1 Read

Knee sliced open by skate blade: complete patellar tendon rupture in an elite long track speed skater.

BMJ Case Rep 2019 Apr 14;12(4). Epub 2019 Apr 14.

Orthopaedic Department, Baerum Hospital, Vestre Viken Hospital Trust, Akershus, Norway.

A long track speed skater sustained a deep horizontal cut to the right knee just distally to the patella, after he got hit by the skate blade of the pair mate. The injury included a complete patellar tendon rupture from the apex of the patella, a 1 mm deep transverse cut in the femoral condyle and a partial rupture of the anterior cruciate ligament. The tendon rupture was repaired with transosseous suture repair without augmentation. Read More

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http://dx.doi.org/10.1136/bcr-2018-228611DOI Listing
April 2019
1 Read

Predictors of Healing Ligament Size and Magnetic Resonance Signal Intensity at 6 Months After Bridge-Enhanced Anterior Cruciate Ligament Repair.

Am J Sports Med 2019 Apr 15:363546519836087. Epub 2019 Apr 15.

Investigation performed at Boston Children's Hospital, Boston, Massachusetts, USA.

Background: Primary repair of the anterior cruciate ligament (ACL) augmented with a tissue engineered scaffold to facilitate ligament healing is a technique under development for patients with ACL injuries. The size (the amount of tissue) and signal intensity (the quality of tissue) of the healing ligament as visualized on magnetic resonance imaging (MRI) have been shown to be related to its strength in large animal models.

Hypothesis: Both modifiable and nonmodifiable risk factors could influence the size and signal intensity of the repaired ligament in patients at 6 months after surgery. Read More

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http://dx.doi.org/10.1177/0363546519836087DOI Listing
April 2019
1 Read

Knee Ultrasonography to Determine Risk for Noncontact Injuries in Collegiate American Football Players.

J Knee Surg 2019 Apr 8. Epub 2019 Apr 8.

Thompson Laboratory for Regenerative Orthopaedics, University of Missouri, Columbia, Missouri.

Knee ultrasonography has been used effectively as a screening tool for determining risk for knee injuries in athletes. Ultrasonography may be a valuable screening tool for relative risk of noncontact knee injuries that occur over a typical playing career in collegiate American football players. In this prospective longitudinal study, we evaluated American football players ( = 48) in an academic institution affiliated with the National Collegiate Athletic Association Division I athletic program. Read More

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http://dx.doi.org/10.1055/s-0039-1683953DOI Listing
April 2019
4 Reads

Effect of Blood Flow Restriction Training on Quadriceps Muscle Strength, Morphology, Physiology, and Knee Biomechanics Before and After Anterior Cruciate Ligament Reconstruction: Protocol for a Randomized Clinical Trial.

Phys Ther 2019 Apr 5. Epub 2019 Apr 5.

FACSM, Department of Rehabilitation Sciences, University of Kentucky, 900 S. Limestone, Room 204D, Lexington, KY 40536-0200 (USA); and Department of Orthopaedic Surgery & Sports Medicine, University of Kentucky.

Background: Despite best practice, quadriceps strength deficits often persist for years after anterior cruciate ligament (ACL) reconstruction. Blood flow restriction training (BFRT) is a possible new intervention which applies a pressurized cuff to the proximal thigh that partially occludes blood flow as the patient exercises, which enables patients to train at reduced loads. This training is believed to result in the same benefits as if the patients were training under high loads. Read More

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http://dx.doi.org/10.1093/ptj/pzz062DOI Listing
April 2019
2 Reads

Conditioning Brain Responses to Improve Quadriceps Function in an Individual With Anterior Cruciate Ligament Reconstruction.

Sports Health 2019 Apr 5:1941738119835163. Epub 2019 Apr 5.

Neuromuscular and Rehabilitation Robotics Laboratory (NeuRRo Lab), Department of Physical Medicine and Rehabilitation, Michigan Medicine, University of Michigan, Ann Arbor, Michigan.

Background:: Persistent quadriceps weakness and activation failure are common in individuals with anterior cruciate ligament (ACL) reconstruction. A growing body of evidence indicates that this chronic quadriceps dysfunction could be partly mediated due to reduced corticospinal excitability. However, current rehabilitation approaches do not directly target corticospinal deficits, which may be critical for restoring optimal clinical outcomes after the surgery. Read More

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http://dx.doi.org/10.1177/1941738119835163DOI Listing
April 2019
1 Read

Brief Electrical Stimulation Improves Functional Recovery After Femoral but Not After Facial Nerve Injury in Rats.

Anat Rec (Hoboken) 2019 Apr 5. Epub 2019 Apr 5.

Department of Otorhinolaryngology, Jena University Hospital, Jena, Germany.

Brief low-frequency electrical stimulation (ES, 1 h, 20 Hz) of the proximal nerve stump has emerged as a potential adjunct treatment for nerve injury. Despite available experimental and clinical data, the potentials and limitations of the ES therapy still have to be defined using different animal models, types of nerves, and clinical settings. Here, we show that brief ES of the proximal stump of the transected rat femoral nerve causes, as estimated by motion analysis, enhanced functional recovery reaching preoperative levels within 5 months of injury, in contrast to the incomplete restoration in sham-stimulated (SS) animals. Read More

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http://dx.doi.org/10.1002/ar.24127DOI Listing
April 2019
4 Reads

[Progress of researches on mechanisms of acupuncture therapy for insulin resistance].

Zhen Ci Yan Jiu 2019 Mar;44(3):231-4

Traditional Therapy Department of Fangchun Branch Hospial, Guangdong Provincial Hospital of Traditional Chinese Medicine, Guangzhou 510120.

Insulin resistance (IR) is a common pathophysiological basis of many chronic diseases, such as obesity, type 2 diabetes mellitus (T2DM), nonalcoholic fatty liver disease, cerebral vascular disease, cardiovascular and neurodegenerative diseases, etc. Acupuncture therapy has been demonstrated to have a positive role in reducing IR level in clinical practice. In the present paper, we summarized development of researches on the mechanism of acupuncture therapy underlying improvement of IR in recent 10 years from 1) regulating expression of hypothalamic phosphatidylinositol-3-kinase (PI3K)-p85 and PI3K-P110 proteins in obesity rats; 2) regulating the levels of some related proteins of insulin target tissues (liver and skeletal muscle), such as insulin receptor substrate-1 (IRS)-1 and -2, glucose transporter mRNAs and proteins, sterol regulatory element-binding protein 1 (SREBP-1) and fatty acid synthetase proteins; 3) suppressing inflammatory reaction of liver tissue and down-regulating serum adiponectin in T2DM rats; 4) raising the activity of superoxide dismutase (SOD) and reducing the levels of reactive oxygen species, and malondialdehyde (MDA) contents of quadriceps femoris in spontaneous IR rats; and 5) attenuating structural injury of pancreas islet and apoptosis of pancreatic β cells in diabetes rats. Read More

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http://dx.doi.org/10.13702/j.1000-0607.180057DOI Listing
March 2019
4 Reads

Influence of quadriceps angle on static and dynamic balance in young adults.

J Back Musculoskelet Rehabil 2019 Mar 21. Epub 2019 Mar 21.

Department of Physiotherapy and Rehabilitation, Faculty of Health Sciences, Yıldırım Beyazıt University, Istanbul, Turkey.

Background: Changes in postural stability may be a reason for injuries in individuals who have altered musculoskeletal alignment. Q angle (QA) has shown to be a predictor for lower extremity injuries. However, the relationship between balance and QA has not been investigated in young adults. Read More

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http://dx.doi.org/10.3233/BMR-181332DOI Listing
March 2019
3 Reads

Reply to Dr Yu : Inadvertent quadriceps weakness following the pericapsular nerve group (PENG) block.

Reg Anesth Pain Med 2019 Mar 27. Epub 2019 Mar 27.

Anesthesia, Toronto Western Hospital, University Health Network, Toronto, Ontario, Canada

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http://dx.doi.org/10.1136/rapm-2018-100263DOI Listing
March 2019
1 Read

Alternative Methods of Determining Hamstrings-to-Quadriceps Ratios: a Comprehensive Review.

Sports Med Open 2019 Mar 25;5(1):11. Epub 2019 Mar 25.

Center for Sport Performance and Human Performance Lab, Department of Kinesiology, California State University, 800 N State College Blvd, Fullerton, CA, USA.

The hamstrings-to-quadriceps muscle strength ratio calculated by peak torque has been used as an important tool to detect muscle imbalance, monitor knee joint stability, describe muscle strength properties and functionality, and for lower extremity injury prevention and rehabilitation. However, this ratio does not consider other neuromuscular variables that can also influence the antagonist to agonist muscle relationship, such as torque produced at multiple angles of range of motion, explosive strength, muscle size, muscle fatigue, or muscle activation. The aim of this study was to comprehensively review alternative methods of determining the hamstrings-to-quadriceps ratio. Read More

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http://dx.doi.org/10.1186/s40798-019-0185-0DOI Listing
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC6434009PMC
March 2019
1 Read

Bipartite patella separation and partial quadriceps tendon rupture in the setting of trauma.

Radiol Case Rep 2019 Apr 22;14(4):526-529. Epub 2018 Oct 22.

Department of Radiology, Richmond University Medical Center, 355 Bard Ave. Staten Island, NY 11310, USA.

Normal development of the patella typically involves fusion of secondary ossification centers into a single bone during adolescence, with failure of fusion resulting in bipartite and tripartite patellae. In such variants, injury to incomplete ossification center fusion, though uncommon, has been reported to occur in the setting of traumatic quadriceps tendon rupture. The authors present a rare and complex case of traumatic bipartite fragment separation, patellar avulsion, and a complex partial quadriceps tendon tear confirmed surgically in a 36-year-old male. Read More

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https://linkinghub.elsevier.com/retrieve/pii/S19300433183032
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http://dx.doi.org/10.1016/j.radcr.2018.10.003DOI Listing
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC6412164PMC
April 2019
6 Reads

Treatment of Extensor Tendon Disruption After Total Knee Arthroplasty: A Systematic Review.

J Arthroplasty 2019 Feb 27. Epub 2019 Feb 27.

Department of Orthopaedics, The Ohio State University Wexner Medical Center, Columbus, OH.

Background: Patellar or quadriceps tendon ruptures after total knee arthroplasty constitute a devastating complication with historically poor outcomes. With advances in soft tissue reconstruction and repair techniques, treatment has become more nuanced. Numerous graft options for reconstruction and suture techniques for repair have been described but there is no consensus regarding optimal treatment. Read More

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https://linkinghub.elsevier.com/retrieve/pii/S08835403193020
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http://dx.doi.org/10.1016/j.arth.2019.02.046DOI Listing
February 2019
3 Reads

Combined Anterior Cruciate Ligament, Medial Collateral Ligament, and Posterior Oblique Ligament Reconstruction Through Single Tibial Tunnel Using Hamstring Tendon Autografts.

Authors:
Naser M Selim

Arthrosc Tech 2019 Feb 22;8(2):e163-e173. Epub 2019 Jan 22.

Knee Surgery-Arthroscopy and Sports Injuries Unit, Orthopedic Department, Mansoura University, Mansoura, Egypt.

Combined anterior cruciate ligament (ACL) and medial collateral ligament (MCL) injuries are the most common type of combined ligamentous injury of the knee. The optimal treatment for these combined injuries is controversial. Combined ACL and MCL-posterior oblique ligament (POL) reconstruction avoids late anteromedial rotatory instability and chronic valgus instability of the knee and decreases the increased stress on the ACL graft. Read More

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http://dx.doi.org/10.1016/j.eats.2018.10.008DOI Listing
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC6412168PMC
February 2019
2 Reads

The Relative Location of the Major Femoral Nerve Motor Branches in the Thigh.

Cureus 2019 Jan 14;11(1):e3882. Epub 2019 Jan 14.

Neurosurgery, Penn State Hershey Medical Center, Hershey, USA.

In peripheral nerve surgery, repair of the femoral nerve (FN) requires identification of normal nerve elements both proximal and distal to the level of the injury. We identified FN branches to the sartorius (SRT) and quadriceps muscles in 16 embalmed specimens and calculated the length of each branch to its point of entry into its respective muscle. The SRT and rectus femoris (RF) muscles were mobilized but not transected to mimic the surgical approach. Read More

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http://dx.doi.org/10.7759/cureus.3882DOI Listing
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC6420329PMC
January 2019
1 Read

In vitro effect of caveolin-1 as a slow-release material on bone-tendon junction healing: A comparative study.

Kaohsiung J Med Sci 2019 Mar;35(3):175-182

Department of Orthopedics, The Second Affiliated Hospital of Army Medical University, Chongqing, China.

Bone tendon junction injury is hard to cure because of its special anatomical structure, and the treatment applied for bone-tendon junction injury cannot result in the perfect vascular regeneration and restoration of the fibrocartilage zone. In this article, we aim to explore the effect of caveolin-1 as a slow-release material on bone-tendon junction healing. Seventy-two New Zealand rabbits were randomly selected and assigned into the experimental, sham-operated and control groups (n = 24). Read More

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http://dx.doi.org/10.1002/kjm2.12022DOI Listing
March 2019
1 Read

ACL reconstruction with quadriceps tendon graft and press-fit fixation versus quadruple hamstring graft and interference screw fixation - a matched pair analysis after one year follow up.

BMC Musculoskelet Disord 2019 Mar 14;20(1):109. Epub 2019 Mar 14.

Sports Clinic Cologne at Cologne Merheim Medical Center, Cologne, University of Witten/Herdecke, Ostmerheimerstraße 200, D-51109, Cologne, Germany.

Background: The objective of the study was to compare the results of a primary anterior cruciate ligament reconstruction (ACLR) using the press-fit fixation technique for a quadriceps tendon (QT) graft to a standard quadrupled hamstring (HT) graft with interference screw fixation.

Methods: A retrospective cohort study with a 12-month follow up provided data for 92 patients. Exclusion criteria were accompanying ligament injuries and contralateral ACL injury. Read More

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http://dx.doi.org/10.1186/s12891-019-2499-yDOI Listing
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC6419498PMC
March 2019
2 Reads

Simultaneous spontaneous bilateral quadriceps tendon rupture with secondary hyperparathyroidism in a patient receiving hemodialysis: A case report.

Medicine (Baltimore) 2019 Mar;98(10):e14809

Department of Orthopedics.

Rationale: Simultaneous spontaneous bilateral quadriceps tendon rupture is a rare orthopedic injury; its initial diagnosis is misdiagnosed in up to 50% of patients with secondary hyperparathyroidism. Early diagnosis and surgical repair are important to achieve an excellent functional outcome.

Patient Concerns: We report a case of simultaneous spontaneous bilateral quadriceps tendon rupture associated with secondary hyperparathyroidism. Read More

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http://dx.doi.org/10.1097/MD.0000000000014809DOI Listing
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC6417630PMC
March 2019
1 Read

Ultrasound evaluation of the quadriceps muscles in pronated foot posture.

Foot (Edinb) 2019 Jan 11;38:86-90. Epub 2019 Jan 11.

Physical Therapy Department, Faculty of Rehabilitation Sciences, Tehran University of Medical Sciences, Tehran, Iran. Electronic address:

Objective: The main goal of this study was to investigate the size of all portions of the quadriceps muscles in individuals with pronated foot posture compared to normal foot posture using ultrasound imaging.

Design: Twenty nine females with pronated foot posture and 29 age-, body weight-, body height-matched females with normal foot posture were recruited from university communities. The muscle thicknesses of the rectus femoris (RF), vastus medialis (VM), vastus medialis oblique (VMO), vastus lateralis (VL) and vastus intermedius (VI) were measured using ultrasound imaging. Read More

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http://dx.doi.org/10.1016/j.foot.2019.01.003DOI Listing
January 2019
4 Reads

Transcranial motor evoked potentials electrically elicited by multi-train stimulation can reflect isolated nerve root injury more precisely than those by conventional multi-pulse stimulation: an experimental study in rats.

J Clin Monit Comput 2019 Mar 5. Epub 2019 Mar 5.

Department of Orthopedic Surgery, Wakayama Medical University, 811-1 Kimiidera, Wakayama, 641-8510, Japan.

Nerve root injury can occur in complex spine surgeries. Recording transcranial motor-evoked potentials (TcMEPs) has been the most popular method to monitor motor function during surgery. However, TcMEPs cannot detect single nerve root injury satisfactorily. Read More

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http://dx.doi.org/10.1007/s10877-019-00296-xDOI Listing
March 2019
1 Read

Verification of a Portable Motion Tracking System for Remote Management of Physical Rehabilitation of the Knee.

Sensors (Basel) 2019 Feb 28;19(5). Epub 2019 Feb 28.

Department of Orthopaedic Surgery, School of Medicine, University of Pittsburgh, Pittsburgh, PA 15213, USA.

Rehabilitation following knee injury or surgery is critical for recovery of function and independence. However, patient non-adherence remains a significant barrier to success. Remote rehabilitation using mobile health (mHealth) technologies have potential for improving adherence to and execution of home exercise. Read More

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http://dx.doi.org/10.3390/s19051021DOI Listing
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC6427361PMC
February 2019
1 Read

Arthroscopic Posterior Cruciate Ligament Reconstruction: The Achilles Tendon Allograft versus the Quadriceps Tendon Allograft.

J Knee Surg 2019 Mar 1. Epub 2019 Mar 1.

Department of Orthopaedic Surgery, Sungkyunkwan University School of Medicine, Samsung Medical Center, Seoul, Republic of Korea.

We aimed to compare and analyze the outcomes of arthroscopic posterior cruciate ligament (PCL) reconstruction with the Achilles tendon allograft and the quadriceps tendon allograft. Twenty-nine patients who received the same procedure of arthroscopic PCL reconstruction within our inclusion criteria were reviewed retrospectively. There were 13 patients in the Achilles tendon allograft group and 16 patients in the quadriceps tendon allograft group. Read More

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http://dx.doi.org/10.1055/s-0039-1681029DOI Listing
March 2019
2 Reads

Acute Anterior Cruciate Ligament Rupture: Repair or Reconstruction? Two-Year Results of a Randomized Controlled Clinical Trial.

Am J Sports Med 2019 Mar;47(3):567-577

Centre for Orthopaedic Surgery OCON, Hengelo, the Netherlands.

Background:: Contemporary anterior cruciate ligament (ACL) suture repair techniques have been subject to renewed interest in recent years. Although several clinical studies have yielded good short-term results, high-quality evidence is lacking in regard to the effectiveness of this treatment compared with ACL reconstruction.

Hypothesis:: Dynamic augmented ACL suture repair is at least as effective as anatomic single-bundle ACL reconstruction for the treatment of acute ACL rupture in terms of patient self-reported outcomes at 2 years postoperatively. Read More

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http://dx.doi.org/10.1177/0363546519825878DOI Listing
March 2019
1 Read

Revision ACL reconstruction using quadriceps or hamstring autografts leads to similar results after 4 years: good objective stability but low rate of return to pre-injury sport level.

Knee Surg Sports Traumatol Arthrosc 2019 Mar 1. Epub 2019 Mar 1.

Center for Joint Surgery and Sport Injuries, Sportopaedie Heidelberg, Clinic St. Elisabeth Heidelberg, Max Reger Strasse 5-7, 69121, Heidelberg, Germany.

Purpose: Due to the increased importance of revision ACL reconstruction, this study aims to evaluate the outcome 4 years after the surgery, compare two revision strategies and identify factors that influence the results.

Methods: Seventy-nine patients who received a revision ACL reconstruction were retrospectively evaluated. All patients were assessed with an average follow-up of 4. Read More

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http://dx.doi.org/10.1007/s00167-019-05444-zDOI Listing
March 2019
1 Read

Correction to: Principles of Motor Learning to Support Neuroplasticity After ACL Injury: Implications for Optimizing Performance and Reducing Risk of Second ACL Injury.

Sports Med 2019 Feb 21. Epub 2019 Feb 21.

Exercise Science & Neuroscience Unit, Department Exercise and Health, Faculty of Science, Paderborn University, Paderborn, Germany.

"As ACL injury may alter intracortical facilitation [34] and depressed intracortical inhibition is correlated with decreased quadriceps voluntary activation capability [35], external focus training may provide a means to restore quadriceps muscle activity via increasing intracortical inhibition. Read More

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http://dx.doi.org/10.1007/s40279-019-01078-wDOI Listing
February 2019
1 Read

Effect of Hip Flexion Angle on the Hamstring to Quadriceps Strength Ratio.

Sports (Basel) 2019 Feb 15;7(2). Epub 2019 Feb 15.

Laboratory of Neuromechanics, Department of Physical Education and Sport Science at Serres, Aristotle University of Thessaloniki, Greece.

The purpose of this study was to compare the hamstring to quadriceps ratio (H:Q) obtained from three different hip flexion angles. Seventy-three young athletes performed maximum isokinetic concentric and eccentric knee extension and flexion efforts at 60 °·s and 240 °·s from hip flexion angles of 90°, 60°, and 120°. The conventional (concentric to concentric), functional (eccentric to concentric) and mixed (eccentric at 30 °·s to concentric torque at 240 °·s) H: Q torque ratios and the electromyographic activity from the rectus femoris and biceps femoris were analyzed. Read More

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http://dx.doi.org/10.3390/sports7020043DOI Listing
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC6409775PMC
February 2019
2 Reads

Only one patient out of five achieves symmetrical knee function 6 months after primary anterior cruciate ligament reconstruction.

Knee Surg Sports Traumatol Arthrosc 2019 Feb 18. Epub 2019 Feb 18.

Department of Molecular Medicine and Surgery, Stockholm Sports Trauma Research Center, Karolinska Institutet, Stockholm, Sweden.

Purpose: To assess the percentage of patients achieving symmetrical knee function 6 months after primary anterior cruciate ligament (ACL) reconstruction (ACLR) and to identify factors affecting its achievement, in a large cohort.

Methods: Data were extracted from our clinic database. Patients who underwent primary ACLR from 2000 to 2015 and were assessed with the isokinetic quadriceps and hamstring muscles strength tests and single-leg-hop test at the 6-month follow-up were included in the study. Read More

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http://dx.doi.org/10.1007/s00167-019-05396-4DOI Listing
February 2019
2 Reads

Clinical measures associated with knee function over two years in young athletes after ACL reconstruction.

Knee 2019 Feb 13. Epub 2019 Feb 13.

School of Health and Rehabilitation Sciences, The Ohio State University, Columbus, OH, USA; Sports Medicine Research Institute, The Ohio State University Wexner Medical Center, Columbus, OH, USA; Division of Physical Therapy, The Ohio State University, Columbus, OH, USA. Electronic address:

Purpose: The purpose of this study was to investigate how patient-reported knee function changed over a two-year period in young athletes after anterior cruciate ligament reconstruction (ACLR) and return-to-sport (RTS), and to determine the impact of clinical measures, after controlling for demographic and surgical covariates.

Methods: At the time of RTS after primary, unilateral ACLR, the following data were collected in 67 young athletes: Quadriceps (QF), hamstring (HS), and hip abduction (HA) strength; knee range-of-motion, effusion, and anterior laxity; and patient-reported function using the Knee injury and Osteoarthritis Outcome Score (KOOS). At two years post-RTS, patient-reported function was reevaluated using the KOOS. Read More

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http://dx.doi.org/10.1016/j.knee.2019.01.011DOI Listing
February 2019
2 Reads

Knee Function, Strength, and Resumption of Preinjury Sports Participation in Young Athletes Following Anterior Cruciate Ligament Reconstruction.

J Orthop Sports Phys Ther 2019 Mar 15;49(3):145-153. Epub 2019 Feb 15.

Background: Following anterior cruciate ligament reconstruction (ACLR), young athletes demonstrate deficits in knee function and strength whose association with successful return to preinjury sports participation is not well understood.

Objectives: To examine differences in knee function and strength at the time of return-to-sport clearance between young athletes who successfully resumed preinjury sports participation, those who did not resume preinjury sports participation, and those who sustained a second anterior cruciate ligament (ACL) injury by 1 year following return-to-sport clearance.

Methods: This prospective cohort study collected data in 124 young athletes (mean ± SD age, 17. Read More

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https://www.jospt.org/doi/10.2519/jospt.2019.8624
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http://dx.doi.org/10.2519/jospt.2019.8624DOI Listing
March 2019
5 Reads

Prevalence of Hamstring Strain Injury Risk Factors in Professional and Under-20 Male Football (Soccer) Players.

J Sport Rehabil 2019 Feb 12:1-23. Epub 2019 Feb 12.

1 Federal University of Health Sciences of Porto Alegre (UFCSPA), Porto Alegre, Brazil.

Context:: Hamstring strain injury (HSI) is the most prevalent injury in football (soccer), and a few intrinsic factors have been associated with higher injury rates.

Objective:: To describe the prevalence of the main intrinsic risk factors for HSI in professional and under-20 football players.

Design:: Cross-sectional study. Read More

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http://dx.doi.org/10.1123/jsr.2018-0084DOI Listing
February 2019
12 Reads

RESTORING KNEE EXTENSOR STRENGTH AFTER ANTERIOR CRUCIATE LIGAMENT RECONSTRUCTION: A CLINICAL COMMENTARY.

Int J Sports Phys Ther 2019 Feb;14(1):159-172

Isokinetic Medical Group, FIFA Medical Centre of Excellence, Education & Research Department, Bologna, Italy.

One of the main priorities of rehabilitation after anterior cruciate ligament reconstruction (ACLR) surgery is the restoration of knee extensor muscle strength. Residual deficits in knee extensor muscle size and strength after injury are linked to poor biomechanics, reduced knee function, increased knee osteoarthritis risk, as well as heightened risk of re-injury upon return to sport. Most studies indicate that knee extensor muscle strength is typically not resolved prior to return to sport. Read More

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http://www.ncbi.nlm.nih.gov/pmc/articles/PMC6350662PMC
February 2019
4 Reads

Sex-related differences in joint-angle-specific hamstring-to-quadriceps function following fatigue.

Eur J Sport Sci 2019 Feb 10:1-9. Epub 2019 Feb 10.

c Health Research Institute, University of Limerick , Limerick , Ireland.

The purpose of this study was to examine the effect of fatiguing exercise on sex-related differences in the function of hamstring and quadriceps muscles at several angular velocities and joint angles. Physically active participants (50 male: 28.7 ± 4. Read More

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http://dx.doi.org/10.1080/17461391.2019.1574904DOI Listing
February 2019
3 Reads

ACL Repair With Suture Ligament Augmentation Is Associated With a High Failure Rate Among Adolescent Patients.

Am J Sports Med 2019 Mar 7;47(3):560-566. Epub 2019 Feb 7.

Children's Hospital Colorado, Aurora, Colorado, USA.

Background:: The anterior cruciate ligament (ACL) repair technique avoids graft harvest and therefore the risk of donor site morbidity. However, early failure rates after ACL repair with suture ligament augmentation (SLA) remain high.

Purpose:: To compare surgical failure, functional outcomes, return to sport, and joint laxity between adolescents who underwent ACL repair with SLA and those who underwent ACL reconstruction with quadriceps tendon-patellar bone autograft (QPA). Read More

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http://dx.doi.org/10.1177/0363546518825255DOI Listing
March 2019
7 Reads

Atraumatic acute bilateral quadriceps tendon rupture in a patient with bilateral patella spurs. A case report and review of literature.

Acta Biomed 2018 Dec 19;90(1-S):203-208. Epub 2018 Dec 19.

Department of Orthopedic Surgery, Ospedale di Fiemme, CAVALESE (Trento).

Background And Aim Of The Work: the spontaneous and simultaneous rupture of both quadriceps tendons is uncommon and has rarely been reported in medical literature. The current case involves a 62-years old man with bilateral atraumatic complete quadriceps tendon rupture. Aim of this study is to provide a systematic review of this case and a literature review of similar cases. Read More

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December 2018
3 Reads

Evaluation of the Knees of Asymptomatic Kangoo Jumpers with MR Imaging.

Magn Reson Med Sci 2019 Jan 31. Epub 2019 Jan 31.

Department of Radiology, Kyrenia University, Dr. Suat Günsel Hospital.

Purpose: The aim of this study is to determine the prevalence of pathologic findings in asymptomatic knees of Kangoo Jumpers by using a 3T MRI and to compare them with age and sex-matched controls who do not regularly participate in any impact sports.

Methods: Both knees of 18 Kangoo Jumpers were examined by 3T MRIs in a total of 36 MRI scans. The control group was comprised of 20 volunteers from the same age group and with similar weights who did not participate in any competitive sports, in a total of 40 MRI scans. Read More

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http://dx.doi.org/10.2463/mrms.mp.2018-0094DOI Listing
January 2019
1 Read

The influence of differences in neurocognitive function on lower limb kinematics, kinetics, and muscle activity during an unanticipated cutting motion.

Phys Ther Res 2018 30;21(2):44-52. Epub 2018 Aug 30.

Faculty of Health and Sport Sciences, University of Tsukuba.

Neurocognitive function may be a risk factor for anterior cruciate ligament (ACL) injury by changing neuromuscular control such as muscle activities. However, the effect of differences in neurocognitive function on biomechanics and neuromuscular control related to ACL injury risk is not clear. The purpose of this study was to examine the effect of differences in neurocognitive function on biomechanics and neuromuscular control during an unanticipated side-step cutting motion. Read More

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https://www.jstage.jst.go.jp/article/ptr/21/2/21_E9938/_arti
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http://dx.doi.org/10.1298/ptr.E9938DOI Listing
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC6336436PMC
August 2018
26 Reads

Self-Managed Strength Training for Active Duty Military With a Knee Injury: A Randomized Controlled Pilot Trial.

Mil Med 2019 Jan 24. Epub 2019 Jan 24.

College of Medicine, University of Tennessee Health Science Center, Department of Neurology, 855 Monroe Ave, Suite 415, Memphis, TN.

Introduction: Knee injuries among active duty military are one of the most frequent musculoskeletal injuries and are often caused by exercise or intense physical activity or combat training. These injuries pose a threat to force readiness. Our objective was to assess feasibility (including recruitment and retention rates) of three self-managed strengthening strategies for knee injuries and determine if they resulted in improvements in lower extremity strength, function, pain, and activity compared to usual physical therapy (PT) in military members. Read More

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http://dx.doi.org/10.1093/milmed/usy347DOI Listing
January 2019
2 Reads

Nandrolone decanoate administration does not attenuate muscle atrophy during a short period of disuse.

PLoS One 2019 28;14(1):e0210823. Epub 2019 Jan 28.

NUTRIM School of Nutrition and Translational Research in Metabolism, Maastricht University Medical Centre+, Maastricht, The Netherlands.

Background: A few days of bed rest or immobilization following injury, disease, or surgery can lead to considerable loss of skeletal muscle mass and strength. It has been speculated that such short, successive periods of muscle disuse may be largely responsible for the age-related loss of muscle mass throughout the lifespan.

Objective: To assess whether a single intramuscular injection of nandrolone decanoate prior to immobilization can attenuate the loss of muscle mass and strength in vivo in humans. Read More

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http://journals.plos.org/plosone/article?id=10.1371/journal.pone.0210823PLOS
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC6349315PMC
January 2019
2 Reads

Mechanomyography-based muscle fatigue detection during electrically elicited cycling in patients with spinal cord injury.

Med Biol Eng Comput 2019 Jan 28. Epub 2019 Jan 28.

Department of Biomedical Engineering, Faculty of Engineering, University of Malaya, 50603, Kuala Lumpur, Malaysia.

Patients with spinal cord injury (SCI) benefit from muscle training with functional electrical stimulation (FES). For safety reasons and to optimize training outcome, the fatigue state of the target muscle must be monitored. Detection of muscle fatigue from mel frequency cepstral coefficient (MFCC) feature of mechanomyographic (MMG) signal using support vector machine (SVM) classifier is a promising new approach. Read More

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http://dx.doi.org/10.1007/s11517-019-01949-4DOI Listing
January 2019
2 Reads

Changes in stair ascent biomechanics two to eight years after ACL reconstruction are associated with patient-reported outcomes.

Gait Posture 2019 Jan 22;69:91-95. Epub 2019 Jan 22.

BioMotion Laboratory, Department of Mechanical Engineering, Stanford University, CA, United States; Department of Orthopaedic Surgery, Stanford University, CA, United States.

Background: Anterior cruciate ligament (ACL) injury is often followed by quadriceps deficits that are apparent with gait analysis. The deficit frequently remains after ACL reconstruction (ACLR). As such, evaluation of ACLR patients could be enhanced by a simple method to detect quadriceps deficits. Read More

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http://dx.doi.org/10.1016/j.gaitpost.2019.01.029DOI Listing
January 2019
5 Reads

Effect of Loading Devices on Muscle Activation in Squat and Lunge.

J Sport Rehabil 2019 Jan 24:1-19. Epub 2019 Jan 24.

2 Department of Exercise Health Science, National Taiwan University of Sport.

Context:: Squats and lunges are common exercises frequently applied in muscle strengthening and therapeutic exercises. The loading devices are often used to increase the training intensity.

Objective:: To determine the effect of loading devices on muscle activation in squat and lunge, and to compare the differences in muscle activation between squat and lunge. Read More

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http://dx.doi.org/10.1123/jsr.2018-0182DOI Listing
January 2019
4 Reads

Dermal papillae flattening of thigh skin in Syndrome.

Eur J Transl Myol 2018 Nov 13;28(4):7914. Epub 2018 Dec 13.

Interdepartmental Research Center of Myology, Department of Neuroscience, Section of Human Anatomy, University of Padova, Italy.

Our previous studies have shown that severely atrophic Quadriceps muscles of spinal cord injury (SCI) persons suffering with complete and syndrome, and thus with permanent denervation-induced atrophy and degeneration of muscle, were almost completely rescued to normal size after two years of home based Functional Electrical Stimulation (hbFES). Since large surface electrodes were used to stimulate the denervated thigh muscles, we wanted to know if the skin was affected by this peculiar long-term treatment. Indeed, we demonstrated by two approaches that the epidermis decreases in thickness in the long term denervated persons, while it increased to almost pre-SCI values in hbFES compliant SCI persons. Read More

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http://dx.doi.org/10.4081/ejtm.2018.7914DOI Listing
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC6317141PMC
November 2018
2 Reads

Determination of a Critical Size Threshold for Volumetric Muscle Loss in the Mouse Quadriceps.

Tissue Eng Part C Methods 2019 Feb;25(2):59-70

1 Wallace H. Coulter Department of Biomedical Engineering, Georgia Institute of Technology and Emory Unversity, Atlanta, Georgia.

Impact Statement: The goal of this study was to determine the threshold for a critically sized, nonhealing muscle defect by characterizing key components in the balance between fibrosis and regeneration as a function of injury size in the mouse quadriceps. There is currently limited understanding of what leads to a critically sized muscle defect and which muscle regenerative components are functionally impaired. With the substantial increase in preclinical VML models as testbeds for tissue engineering therapeutics, defining the critical threshold for VML injuries will be instrumental in characterizing therapeutic efficacy and potential for subsequent translation. Read More

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https://www.liebertpub.com/doi/10.1089/ten.TEC.2018.0324
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http://dx.doi.org/10.1089/ten.TEC.2018.0324DOI Listing
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC6389771PMC
February 2019
12 Reads

Technique and Outcome of a Modified Tibial Plateau Levelling Osteotomy for Treatment of Concurrent Medial Patellar Luxation and Cranial Cruciate Ligament Rupture in 76 Stifles.

Vet Comp Orthop Traumatol 2019 Jan 15;32(1):26-32. Epub 2019 Jan 15.

Department of Surgery, Gulf Coast Veterinary Specialists, Houston, Texas, United States.

Objectives:  The main aim of this article is to describe the technique and outcome of a modified tibial plateau levelling osteotomy (TPLO) that simultaneously levels the tibial plateau and realigns the quadriceps mechanism through medial translation of the proximal tibial segment in dogs less than 15 kg.

Materials And Methods:  A retrospective medical records search identified dogs with concurrent cranial cruciate ligament rupture (CCLR) and medial patellar luxation (MPL). A study group (76 stifles) treated with a modified TPLO was compared with a non-tibial translation group (45 stifles) corrected with traditional surgical technique. Read More

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http://dx.doi.org/10.1055/s-0038-1676296DOI Listing
January 2019
11 Reads

Changes in Lower Body Muscular Performance Following a Season of NCAA Division I Men's Lacrosse.

Sports (Basel) 2019 Jan 9;7(1). Epub 2019 Jan 9.

Department of Rehabilitation, Nutrition, and Sport, School of Allied Health, Latrobe University, Bundoora Victoria 3083, Australia.

The tactical and technical components of training become a primary emphasis, leaving less time for targeted development of physical qualities that underpin performance during the competition phase of a training program. A deemphasis on physical preparation during the in-season training phase may make athletes more susceptible to injury and decrease performance on the field. Two weeks prior to the start and one week following the conclusion of the 16-week collegiate lacrosse season, lower body force production was assessed in eight National Collegiate Athletic Association (NCAA) Division I Men's Lacrosse athletes. Read More

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http://dx.doi.org/10.3390/sports7010018DOI Listing
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC6359267PMC
January 2019
10 Reads

The Use of Negative Acceleration as Accessory Force during Lifting.

Adv Orthop 2018 2;2018:9164590. Epub 2018 Dec 2.

Department of Physical Therapy, University of Illinois at Chicago, Chicago, IL, USA.

Objectives: Injury associated with lifting, especially low back injury, is a big problem in industry that accounts for loss of work and high medical expenses. Studies of biomechanics of lifting provide a basis for optimization of lifting. The aim of the study was to further investigate the role of the upward force due to negative acceleration during a lift. Read More

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http://dx.doi.org/10.1155/2018/9164590DOI Listing
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC6304531PMC
December 2018
2 Reads

Stimulation of paralysed quadriceps muscles with sequentially and spatially distributed electrodes during dynamic knee extension.

J Neuroeng Rehabil 2019 Jan 7;16(1). Epub 2019 Jan 7.

Swiss Paraplegic Centre, Nottwil, 6207, Switzerland.

Background: During functional electrical stimulation (FES) tasks with able-bodied (AB) participants, spatially distributed sequential stimulation (SDSS) has demonstrated substantial improvements in power output and fatigue properties compared to conventional single electrode stimulation (SES). The aim of this study was to compare the properties of SDSS and SES in participants with spinal cord injury (SCI) in a dynamic isokinetic knee extension task simulating knee movement during recumbent cycling.

Method: Using a case-series design, m. Read More

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http://dx.doi.org/10.1186/s12984-018-0471-yDOI Listing
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC6322281PMC
January 2019
3 Reads

Defects in sarcolemma repair and skeletal muscle function after injury in a mouse model of Niemann-Pick type A/B disease.

Skelet Muscle 2019 Jan 5;9(1). Epub 2019 Jan 5.

Department of Cell Biology and Molecular Genetics, University of Maryland, 2134 Bioscience Research Building, College Park, MD, 20742-5815, USA.

Background: Niemann-Pick disease type A (NPDA), a disease caused by mutations in acid sphingomyelinase (ASM), involves severe neurodegeneration and early death. Intracellular lipid accumulation and plasma membrane alterations are implicated in the pathology. ASM is also linked to the mechanism of plasma membrane repair, so we investigated the impact of ASM deficiency in skeletal muscle, a tissue that undergoes frequent cycles of injury and repair in vivo. Read More

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https://skeletalmusclejournal.biomedcentral.com/articles/10.
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http://dx.doi.org/10.1186/s13395-018-0187-5DOI Listing
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC6320626PMC
January 2019
4 Reads