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(Anterior cruciate ligament) AND (quadriceps activation)

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https://www.readbyqxmd.com/read/28388231/sex-differences-in-high-school-athletes-knowledge-of-sport-related-concussion-symptoms-and-reporting-behaviors
#1
Jessica Wallace, Tracey Covassin, Erica Beidler
CONTEXT:   Recent researchers have reported that athletes' knowledge of sport-related concussion (SRC) has increased but that athletes still lack knowledge of all the signs and symptoms of SRC. Understanding the signs and symptoms of SRC and the dangers of playing while symptomatic are critical to reporting behaviors in high school athletes. OBJECTIVE:   To examine sex differences in knowledge of SRC symptoms and reasons for not reporting a suspected SRC to an authoritative figure in high school athletes...
April 18, 2017: Journal of Athletic Training
https://www.readbyqxmd.com/read/28324994/co-activation-periods-of-gastrocnemius-and-vastus-lateralis-during-walking-evaluated-by-surface-electromyography
#2
Alessandro Mengarelli, Annachiara Strazza, Agnese Sbrollini, Angela Agostinelli, Laura Burattini, Sandro Fioretti, Francesco Di Nardo
"In vivo" studies reported that the co-activation of gastrocnemius and quadriceps femoris (QF) muscles produces ACL strain values greater than those caused by an isolated activation of either muscle. Aim of this study was to assess the co-activation of gastrocnemius (lateral head, GL) and vastus lateralis (VL) in healthy and young adults during walking. To this purpose the Statistical Gait Analysis was performed, that allows a characterization of gait considering hundreds of strides belonging to the same walking trial...
August 2016: Conference Proceedings: Annual International Conference of the IEEE Engineering in Medicine and Biology Society
https://www.readbyqxmd.com/read/28290752/mri-based-assessment-of-lower-extremity-muscle-volumes-in-patients-before-and-after-acl-reconstruction
#3
Grant E Norte, Katherine R Knaus, Chris Kuenze, Geoffrey G Handsfield, Craig H Meyer, Silvia S Blemker, Joseph M Hart
CONTEXT: Study of muscle volumes in patients after anterior cruciate ligament (ACL) injury and reconstruction (ACL-R) is largely limited to cross-sectional assessment of the thigh musculature, which may inadequately describe post-traumatic and post-surgical muscle function. No studies have prospectively examined the influence of ACL injury and reconstruction on lower extremity muscle volumes. OBJECTIVE: Assess magnetic resonance imaging (MRI) derived lower extremity muscle volumes, and quantify quadriceps strength and activation in patients following ACL injury and reconstruction...
March 14, 2017: Journal of Sport Rehabilitation
https://www.readbyqxmd.com/read/28284998/acute-mobilization-and-migration-of-bone-marrow-derived-stem-cells-following-anterior-cruciate-ligament-rupture
#4
T Maerz, M Fleischer, M D Newton, A Davidson, M Salisbury, P Altman, M D Kurdziel, K Anderson, A Bedi, K C Baker
OBJECTIVE: Little is known regarding acute local and systemic processes following anterior cruciate ligament (ACL) rupture. No study has elucidated whether bone marrow-derived mesenchymal stem cells (MSCs) are mobilized into circulation and recruited to the injured joint. METHODS: In Part 1, Lewis rats were randomized to noninvasive ACL rupture (Rupture) or non-injured (Control) (n = 6/group). After 72 h, whole blood MSC concentration was assessed using flow cytometry...
March 8, 2017: Osteoarthritis and Cartilage
https://www.readbyqxmd.com/read/28255567/an-ecological-study-of-anterior-cruciate-ligament-reconstruction-part-2-functional-performance-tests-correlate-with-return-to-sport-outcomes
#5
Timothy M McGrath, Gordon Waddington, Jennie M Scarvell, Nick Ball, Rob Creer, Kevin Woods, Damian Smith, Roger Adams
BACKGROUND: Additional high-quality prospective studies are needed to better define the objective criteria used in relation to return-to-sport decisions after anterior cruciate ligament (ACL) reconstruction in active populations. PURPOSE: To investigate prospectively the relationship between functional performance test results at 24 weeks postoperative and return-to-sport activity (Tegner activity score) at 12 and 24 months, respectively, after synthetic (ligament advanced reinforcement system [LARS]) and autograft (doubled semitendinosus/gracilis [2ST/2GR]) ACL reconstructions...
February 2017: Orthopaedic Journal of Sports Medicine
https://www.readbyqxmd.com/read/28227317/co-activation-periods-of-gastrocnemius-and-vastus-lateralis-during-walking-evaluated-by-surface-electromyography
#6
Alessandro Mengarelli, Annachiara Strazza, Agnese Sbrollini, Angela Agostinelli, Laura Burattini, Sandro Fioretti, Francesco Di Nardo, Alessandro Mengarelli, Annachiara Strazza, Agnese Sbrollini, Angela Agostinelli, Laura Burattini, Sandro Fioretti, Francesco Di Nardo, Alessandro Mengarelli, Sandro Fioretti, Agnese Sbrollini, Annachiara Strazza, Laura Burattini, Angela Agostinelli, Francesco Di Nardo
"In vivo" studies reported that the co-activation of gastrocnemius and quadriceps femoris (QF) muscles produces ACL strain values greater than those caused by an isolated activation of either muscle. Aim of this study was to assess the co-activation of gastrocnemius (lateral head, GL) and vastus lateralis (VL) in healthy and young adults during walking. To this purpose the Statistical Gait Analysis was performed, that allows a characterization of gait considering hundreds of strides belonging to the same walking trial...
August 2016: Conference Proceedings: Annual International Conference of the IEEE Engineering in Medicine and Biology Society
https://www.readbyqxmd.com/read/28224443/report-of-the-clinical-and-functional-primary-outcomes-in-men-of-the-acl-sports-trial-similar-outcomes-in-men-receiving-secondary-prevention-with-and-without-perturbation-training-1-and-2-years-after-acl-reconstruction
#7
Amelia J H Arundale, Kathleen Cummer, Jacob J Capin, Ryan Zarzycki, Lynn Snyder-Mackler
BACKGROUND: Athletes often are cleared to return to activities 6 months after anterior cruciate ligament (ACL) reconstruction; however, knee function measures continue to improve up to 2 years after surgery. Interventions beyond standard care may facilitate successful return to preinjury activities and improve functional outcomes. Perturbation training has been used in nonoperative ACL injury and preoperative ACL reconstruction rehabilitation, but has not been examined in postoperative ACL reconstruction rehabilitation, specifically return to sport rehabilitation...
February 21, 2017: Clinical Orthopaedics and related Research
https://www.readbyqxmd.com/read/28224442/report-of-the-primary-outcomes-for-gait-mechanics-in-men-of-the-acl-sports-trial-secondary-prevention-with-and-without-perturbation-training-does-not-restore-gait-symmetry-in-men-1-or-2-years-after-acl-reconstruction
#8
Jacob John Capin, Ryan Zarzycki, Amelia Arundale, Kathleen Cummer, Lynn Snyder-Mackler
BACKGROUND: Movement asymmetries during walking are common after anterior cruciate ligament (ACL) injury and reconstruction and may influence the early development of posttraumatic osteoarthritis. Preoperative neuromuscular training (like perturbation training, which is neuromuscular training requiring selective muscle activation in response to surface perturbations) improves gait asymmetries and functional outcomes among people who are ACL-deficient, but the effect of postoperative perturbation training on gait mechanics after ACL reconstruction is unknown...
February 21, 2017: Clinical Orthopaedics and related Research
https://www.readbyqxmd.com/read/28217412/exercises-that-facilitate-optimal-hamstring-and-quadriceps-co-activation-to-help-decrease-acl-injury-risk-in-healthy-females-a-systematic-review-of-the-literature
#9
Rachel Dedinsky, Lindsey Baker, Samuel Imbus, Melissa Bowman, Leigh Murray
BACKGROUND: Anterior cruciate ligament (ACL) injury is common among females due to many anatomic, hormonal, and neuromuscular risk factors. One modifiable risk factor that places females at increased risk of ACL injury is a poor hamstrings: quadriceps (H:Q) co-activation ratio, which should be 0.6 or greater in order to decrease the stress placed on the ACL. Exercises that produce more quadriceps dominant muscle activation can add to the tension placed upon the ACL, potentially increasing the risk of ACL injury...
February 2017: International Journal of Sports Physical Therapy
https://www.readbyqxmd.com/read/28195986/functional-bracing-after-anterior-cruciate-ligament-reconstruction-a-systematic-review
#10
Walter R Lowe, Ryan J Warth, Elizabeth P Davis, Lane Bailey
INTRODUCTION: The purpose of this study was to evaluate the current literature on the use of functional knee braces after anterior cruciate ligament (ACL) reconstruction with respect to clinical and in vivo biomechanical data. METHODS: A systematic search of both the PubMed and Embase databases was performed to identify all studies that reported clinical and/or in vivo biomechanical results of functional bracing versus nonbracing after ACL reconstruction. Extracted data included study design, surgical reconstruction techniques, postoperative rehabilitation protocols, objective outcomes, and subjective outcomes scores...
March 2017: Journal of the American Academy of Orthopaedic Surgeons
https://www.readbyqxmd.com/read/28144695/greater-intracortical-inhibition-associates-with-lower-quadriceps-voluntary-activation-in-individuals-with-acl-reconstruction
#11
Brittney A Luc-Harkey, Matthew S Harkey, Derek N Pamukoff, Rebecca H Kim, Troy K Royal, J Troy Blackburn, Jeffery T Spang, Brian Pietrosimone
Decreased voluntary activation contributes to quadriceps weakness following anterior cruciate ligament reconstruction (ACLR). Alterations in neural excitability are likely responsible for reductions in quadriceps voluntary activation, and may be due to specific alterations in intracortical inhibition and facilitation. Therefore, we sought to determine if intracortical inhibition (SICI) and intracortical facilitation (ICF) associate with quadriceps voluntary activation in individuals with ACLR. Twenty-seven participants with a primary, unilateral ACLR were enrolled in this study...
April 2017: Experimental Brain Research. Experimentelle Hirnforschung. Expérimentation Cérébrale
https://www.readbyqxmd.com/read/28125899/do-patients-failing-return-to-activity-criteria-at-6-months-after-anterior-cruciate-ligament-reconstruction-continue-demonstrating-deficits-at-2-years
#12
Zakariya Nawasreh, David Logerstedt, Kathleen Cummer, Michael J Axe, May Arna Risberg, Lynn Snyder-Mackler
BACKGROUND: The variability in outcomes after anterior cruciate ligament reconstruction (ACLR) might be related to the criteria that are used to determine athletes' readiness to return to their preinjury activity level. A battery of return-to-activity criteria (RTAC) that emphasize normal knee function and movement symmetry has been instituted to quantitatively determine athletes' readiness to return to preinjury activities. PURPOSE: To investigate performance-based and patient-reported measures at 12 and 24 months after ACLR between patients who passed or failed RTAC at 6 months after ACLR...
April 2017: American Journal of Sports Medicine
https://www.readbyqxmd.com/read/28040578/analgesia-after-acl-reconstruction-hamstring-donor-site-injection-versus-intra-articular-local-anaesthetic-injection
#13
B Sonnery-Cottet, A Saithna, A Azeem, E Choudja, J B Pic, J Cabaton, M Thaunat
BACKGROUND: The purpose of this study was to compare hamstring donor-site injection versus intra-articular injection of a local anaesthetic for analgesia after anterior cruciate ligament (ACL) reconstruction. HYPOTHESIS: The two methods provide similar pain relief. MATERIAL AND METHODS: 158 consecutive patients undergoing ACL hamstring tendon graft reconstruction (semi-tendinosus/gracilis [STG] or four-stranded semi-tendinosus [ST4]) during two periods in 2015 were included...
April 2017: Orthopaedics & Traumatology, Surgery & Research: OTSR
https://www.readbyqxmd.com/read/27955813/gap-formation-following-primary-repair-of-the-anterior-cruciate-ligament-a-biomechanical-evaluation
#14
Jelle P van der List, Gregory S DiFelice
BACKGROUND: Historically, inconsistent and unpredictable results of open primary anterior cruciate ligament (ACL) repair were reported. Recently, however, good results of arthroscopic primary ACL repair of proximal tears have been reported. Purpose of this study was to assess the direct postoperative gap formation and maximum failure load following simulated knee motion after primary ACL repair. METHODS: Six matched-paired human cadaveric knees (mean age: 52years, range: 48 to 56years) were used...
December 7, 2016: Knee
https://www.readbyqxmd.com/read/27836905/electrophysiological-study-of-femoral-nerve-function-after-a-continuous-femoral-nerve-block-for-anterior-cruciate-ligament-reconstruction
#15
Kevin Stebler, Robin Martin, Kyle Robert Kirkham, Thierry Küntzer, Istvan Bathory, Eric Albrecht
BACKGROUND: A continuous femoral nerve block (CFNB) is an effective analgesic treatment after anterior cruciate ligament (ACL) reconstruction but may result in transient femoral nerve injuries and quadriceps muscle weakness, which in turn contribute to worsened functional outcomes. PURPOSE: To compare electrophysiological criteria of a femoral nerve injury as well as functional and pain-related outcomes after ACL reconstruction when analgesia was provided by a CFNB or intravenous patient-controlled analgesic of morphine (IV PCA)...
March 2017: American Journal of Sports Medicine
https://www.readbyqxmd.com/read/27834612/the-effectiveness-of-neuromuscular-electrical-stimulation-in-improving-voluntary-activation-of-the-quadriceps-a-critically-appraised-topic
#16
Cody B Bremner, William R Holcomb, Christopher D Brown, Melanie E Perreault
Clinical Scenario: Orthopedic knee conditions are regularly treated in sports medicine clinics. Rehabilitation protocols for these conditions are often designed to address the associated quadriceps strength deficits. Despite these efforts, patients with orthopedic knee conditions often fail to completely regain their quadriceps strength. Disinhibitory modalities have recently been suggested as a clinical tool that can be used to counteract the negative effects of arthrogenic muscle inhibition (AMI), which is believed to limit the effectiveness of therapeutic exercise...
November 11, 2016: Journal of Sport Rehabilitation
https://www.readbyqxmd.com/read/27799671/comparison-of-hamstring-to-quadriceps-ratio-between-accelerating-and-decelerating-sections-during-squat-exercise
#17
Won-Gyu Yoo
[Purpose] The aim of this study was to compare hamstring-to-quadriceps ratio between the accelerating and decelerating sections for anterior cruciate ligament protection during squat exercise. [Subjects and Methods] Nine asymptomatic males were enrolled in this study. The hamstring (medial part) and quadriceps (rectus femoris) muscle activities during squat exercise were measured, and the squat exercises were classified into two sections (accelerating and decelerating) by using an accelerometer. [Results] The hamstring-to-quadriceps ratio was significantly higher in the decelerating section than in the accelerating section during the squat exercise...
September 2016: Journal of Physical Therapy Science
https://www.readbyqxmd.com/read/27665093/an-anterior-cruciate-ligament-injury-does-not-affect-the-neuromuscular-function-of-the-non-injured-leg-except-for-dynamic-balance-and-voluntary-quadriceps-activation
#18
Tjerk Zult, Alli Gokeler, Jos J A M van Raay, Reinoud W Brouwer, Inge Zijdewind, Tibor Hortobágyi
PURPOSE: The function of the anterior cruciate ligament (ACL) patients' non-injured leg is relevant in light of the high incidence of secondary ACL injuries on the contralateral side. However, the non-injured leg's function has only been examined for a selected number of neuromuscular outcomes and often without appropriate control groups. We measured a broad array of neuromuscular functions between legs of ACL patients and compared outcomes to age, sex, and physical activity matched controls...
January 2017: Knee Surgery, Sports Traumatology, Arthroscopy: Official Journal of the ESSKA
https://www.readbyqxmd.com/read/27642857/intra-and-inter-session-reliability-of-quadriceps-and-hamstrings-electromyography-during-a-standardized-hurdle-jump-test-with-single-leg-landing
#19
Mark Tyler Cavanaugh, Saied Jalal Aboodarda, David George Behm
The objective of this study was to develop a standardized test to determine quadriceps and hamstrings muscle activation in a position emulating a non-contact anterior cruciate ligament injury. We assessed the intra- and inter-session reliability of surface electromyography (EMG) of the dominant leg following single-leg landing from a standardized hurdle jump. Eighteen subjects (10 males, 8 females) participated in four repeated sessions. During each session, individuals performed three successful jumps over a hurdle set to 75% of their maximal countermovement jump height and landed on their dominant leg...
September 6, 2016: Journal of Strength and Conditioning Research
https://www.readbyqxmd.com/read/27553297/factors-affecting-quadriceps-strength-recovery-after-anterior-cruciate-ligament-reconstruction-with-hamstring-autografts-in-athletes
#20
Yuya Ueda, Takehiko Matsushita, Daisuke Araki, Akihiro Kida, Kohei Takiguchi, Yohei Shibata, Kumiko Ono, Rei Ono, Tomoyuki Matsumoto, Koji Takayama, Yoshitada Sakai, Masahiro Kurosaka, Ryosuke Kuroda
PURPOSE: Patients typically return to sports activities 6-12 months after anterior cruciate ligament (ACL) reconstruction, and quadriceps strength has been used as one of the criteria to return to sports activities. The purpose of this study is to identify the factors that affect quadriceps strength recovery after ACL reconstruction with a hamstring tendon autograft 6 months after surgery. METHODS: Isokinetic quadriceps strength at 60°/s was measured preoperatively and 6 months after surgery in 193 athletes who underwent ACL reconstruction with a hamstring tendon autograft...
August 23, 2016: Knee Surgery, Sports Traumatology, Arthroscopy: Official Journal of the ESSKA
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