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lateral ankle strain

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https://www.readbyqxmd.com/read/30090832/propagation-of-syndesmotic-injuries-during-forced-external-rotation-in-flexed-cadaveric-ankles
#1
Alexander Ritz Mait, Jason Lee Forman, Bingbing Nie, John Paul Donlon, Adwait Mane, Ali Reza Forghani, Robert B Anderson, M Truitt Cooper, Richard W Kent
Background: Forced external rotation of the foot is a mechanism of ankle injuries. Clinical observations include combinations of ligament and osseous injuries, with unclear links between causation and injury patterns. By observing the propagation sequence of ankle injuries during controlled experiments, insight necessary to understand risk factors and potential mitigation measures may be gained. Hypothesis: Ankle flexion will alter the propagation sequence of ankle injuries during forced external rotation of the foot...
June 2018: Orthopaedic Journal of Sports Medicine
https://www.readbyqxmd.com/read/29708573/medial-compartment-decompression-by-proximal-fibular-osteotomy-a-biomechanical-cadaver-study
#2
Todd Baldini, Jesse Roberts, Jiandong Hao, Kenneth Hunt, Michael Dayton, Craig Hogan
Medial compartment knee osteoarthritis is a painful and debilitating disease. A proximal fibular osteotomy is a novel, simple surgical technique that may reduce pain and improve function for patients with osteoarthritis. The purpose of this biomechanical cadaver study was to determine what effect proximal fibular osteotomy had on knee joint and ankle pressures and tibia strain. Ten matched pairs of cadaver legs were tested in compression to 1.1 times body weight comparing intact and with proximal fibular osteotomy at 0°, 15°, and 30° of flexion...
July 1, 2018: Orthopedics
https://www.readbyqxmd.com/read/29603434/differences-in-in-vivo-muscle-fascicle-and-tendinous-tissue-behavior-between-the-ankle-plantarflexors-during-running
#3
A K M Lai, G A Lichtwark, A G Schache, M G Pandy
The primary human ankle plantarflexors, soleus (SO), medial gastrocnemius (MG), and lateral gastrocnemius (LG) are typically regarded as synergists and play a critical role in running. However, due to differences in muscle-tendon architecture and joint articulation, the muscle fascicles and tendinous tissue of the plantarflexors may exhibit differences in their behavior and interactions during running. We combined in vivo dynamic ultrasound measurements with inverse dynamics analyses to identify and explain differences in muscle fascicle, muscle-tendon unit, and tendinous tissue behavior of the primary ankle plantarflexors across a range of steady-state running speeds...
July 2018: Scandinavian Journal of Medicine & Science in Sports
https://www.readbyqxmd.com/read/29144991/finite-element-simulation-on-posterior-tibial-tendinopathy-load-transfer-alteration-and-implications-to-the-onset-of-pes-planus
#4
Duo Wai-Chi Wong, Yan Wang, Aaron Kam-Lun Leung, Ming Yang, Ming Zhang
BACKGROUND: Posterior tibial tendinopathy is a challenging foot condition resulting in pes planus, which is difficult to diagnose in the early stage. Prior to the deformity, abnormal internal load transfer and soft tissue attenuation are anticipated. The objective of this study was to investigate the internal load transfer and strain of the ligaments with posterior tibial tendinopathy, and the implications to pes planus and other deformities. METHODS: A three-dimensional finite element model of the foot and ankle was reconstructed from magnetic resonance images of a 28-year-old normal female...
January 2018: Clinical Biomechanics
https://www.readbyqxmd.com/read/29094399/non-uniform-displacement-and-strain-between-the-soleus-and-gastrocnemius-subtendons-of-rat-achilles-tendon
#5
T Finni, M Bernabei, G C Baan, W Noort, C Tijs, H Maas
Achilles tendon (AT) comprises of 3 subtendons arising from the soleus (SOL) and the lateral (LG) and medial (MG) heads of the gastrocnemius muscle. While recent human studies show differential displacement within AT, these displacements have not been attributed to specific subtendons. We tested the hypothesis that the SOL and LG subtendons show differential displacement and strain during various combinations of SOL, LG, and MG excitations. Movement of knots, sutured onto SOL and LG subtendons of 12 Wistar rats, was videotaped, while the muscles were stimulated intramuscularly and ankle torque was assessed...
March 2018: Scandinavian Journal of Medicine & Science in Sports
https://www.readbyqxmd.com/read/28587794/biomechanical-analysis-of-ankle-ligamentous-sprain-injury-cases-from-televised-basketball-games-understanding-when-how-and-why-ligament-failure-occurs
#6
Emmanouil Panagiotakis, Kam-Ming Mok, Daniel Tik-Pui Fong, Anthony M J Bull
OBJECTIVES: Ankle sprains due to landing on an opponent's foot are common in basketball. There is no analysis to date that provides a quantification of this injury mechanism. The aim of this study was to quantify the kinematics of this specific injury mechanism and relate this to lateral ankle ligament biomechanics. DESIGN: Case series. METHODS: The model-based image-matching technique was used to quantify calcaneo-fibular-talar kinematics during four ankle inversion sprain injury incidents in televised NBA basketball games...
December 2017: Journal of Science and Medicine in Sport
https://www.readbyqxmd.com/read/28246996/biomechanics-and-functional-anatomy-of-the-upper-ankle
#7
H Seiler
Dorsoplantar motion in the upper ankle joint is around one "transverse" rotational axis. In relation to the lower leg this axis is oblique joining the tips of the malleoli. Talocrural motion is highly precise compared to other human joints. Most of the stability and undisturbed motion in the loaded joint is afforded by the intimate osteocartilagineous contact. The rule of the collateral ligaments is secondary stabilisation, buffering of abnormal stresses and centering the talus in the extremes of motion. The posterior talofibular ligament is the universal lateral stabilizer, the deep portion of the deltoid ligament is the predominant medial ligament structure...
June 1999: Der Orthopäde
https://www.readbyqxmd.com/read/27903468/pseudoaneurysms-after-ankle-sprain-report-of-three-cases-successfully-cured-by-nonsurgical-treatment
#8
REVIEW
Jacques Malghem, Mohamad Abdalkader, Frederic Lecouvet, Pierre Goffette, Frank Hammer, Bruno Vande Berg
Pseudoaneurysm is a rare complication of ankle sprain, with 18 case reports published in the current literature. In the vast majority of the cases, they were treated surgically. We present 3 cases of pseudoaneurysm following ankle sprain, treated by nonsurgical methods in 2 cases, and spontaneously healed in another. The diagnosis was made between 2 and 4 weeks after traumatism, by ultrasonography and arteriography in 2 cases, and only by ultrasonography in a third case. The pseudoaneurysms originated respectively from the perforating fibular artery, the dorsal pedis artery, and a lateral malleolar artery...
April 2017: Annals of Vascular Surgery
https://www.readbyqxmd.com/read/27665350/characterization-of-three-dimensional-volumetric-strain-distribution-during-passive-tension-of-the-human-tibialis-anterior-using-cine-phase-contrast-mri
#9
Elisabeth R Jensen, Duane A Morrow, Joel P Felmlee, Naveen S Murthy, Kenton R Kaufman
Intramuscular pressure correlates strongly with muscle tension and is a promising tool for quantifying individual muscle force. However, clinical application is impeded by measurement variability that is not fully understood. Previous studies point to regional differences in IMP, specifically increasing pressure with muscle depth. Based on conservation of mass, intramuscular pressure and volumetric strain distributions may be inversely related. Therefore, we hypothesized volumetric strain would decrease with muscle depth...
October 3, 2016: Journal of Biomechanics
https://www.readbyqxmd.com/read/27587598/association-between-concussion-and-lower-extremity-injuries-in-collegiate-athletes
#10
Frances C Gilbert, G Trey Burdette, A Barry Joyner, Tracy A Llewellyn, Thomas A Buckley
BACKGROUND: Concussions have been associated with elevated musculoskeletal injury risk; however, the influence of unreported and unrecognized concussions has not been investigated. HYPOTHESIS: The purpose of this study was to examine the association between concussion and lower extremity musculoskeletal injury rates across a diverse array of sports among collegiate student-athletes at the conclusion of their athletic career. The hypothesis was that there will be a positive association between athletes who reported a history of concussions and higher rates of lower extremity injuries...
November 2016: Sports Health
https://www.readbyqxmd.com/read/27265583/-bacillus-calmette-gu%C3%A3-rin-osteomyelitis-a-case-report-in-a-former-preterm-baby
#11
A Milleret, C Bost-Bru, J Bustamante, C Durand, C Recule
Postvaccination osteo-articular mycobacterial infectious disease is a rare and potentially serious complication after Bacillus Calmette-Guérin (BCG) vaccine. We report on a case of a former preterm baby born at 30 weeks of gestation who was vaccinated with BCG Copenhagen strain at 2 months of age. He presented 6 months later with a painful limp, which was found to be a mono-articular osteitis of the right ankle. Histology of the biopsy showed signs of mycobacterial infection and molecular analysis confirmed a BCG infection...
July 2016: Archives de Pédiatrie: Organe Officiel de la Sociéte Française de Pédiatrie
https://www.readbyqxmd.com/read/26912285/recovery-from-a-first-time-lateral-ankle-sprain-and-the-predictors-of-chronic-ankle-instability-a-prospective-cohort-analysis
#12
Cailbhe Doherty, Chris Bleakley, Jay Hertel, Brian Caulfield, John Ryan, Eamonn Delahunt
BACKGROUND: Impairments in motor control may predicate the paradigm of chronic ankle instability (CAI) that can develop in the year after an acute lateral ankle sprain (LAS) injury. No prospective analysis is currently available identifying the mechanisms by which these impairments develop and contribute to long-term outcome after LAS. PURPOSE: To identify the motor control deficits predicating CAI outcome after a first-time LAS injury. STUDY DESIGN: Cohort study (diagnosis); Level of evidence, 2...
April 2016: American Journal of Sports Medicine
https://www.readbyqxmd.com/read/26908231/a-highly-susceptible-cd46-transgenic-mouse-model-of-subcutaneous-infection-with-streptococcus-dysgalactiae-subspecies-equisimilis
#13
Haruno Yoshida, Tetsufumi Takahashi, Masahiko Nakamura, Anders Øverby, Takashi Takahashi, Kimiko Ubukata, Hidenori Matsui
The Streptococcus dysgalactiae subspecies equisimilis (SDSE) possesses clinical similarities to group A streptococcus (GAS) and has recently been recognized as a causative pathogen of life-threatening streptococcal infections. Human membrane cofactor protein (CD46), a complement regulatory protein ubiquitously expressed on every cell type except for erythrocytes, has been implicated as a receptor for human-specific pathogens including GAS. In the present report, SDSE strain GGS_124 was isolated from a patient suffering from streptococcal toxic shock syndrome...
April 2016: Journal of Infection and Chemotherapy: Official Journal of the Japan Society of Chemotherapy
https://www.readbyqxmd.com/read/26779551/sex-differences-in-knee-flexion-angle-during-a-rapid-change-of-direction-while-running
#14
Christopher L Sheu, Aaron M Gray, David Brown, Brian A Smith
BACKGROUND: Females experience greater overall rates of athletic anterior cruciate ligament (ACL) injury than males. The specific mechanisms of the predisposition remain unclear. HYPOTHESIS: Modeling of knee kinematics has shown that the more extended the knee joint, the greater the strain on the ACL. The authors hypothesized that female athletes would have a lesser degree of knee flexion than male athletes at initial ground contact while performing change-of-direction cutting maneuvers...
December 2015: Orthopaedic Journal of Sports Medicine
https://www.readbyqxmd.com/read/26747077/radiograph-negative-lateral-ankle-injuries-in-children-occult-growth-plate-fracture-or-sprain
#15
Kathy Boutis, Amy Plint, Jennifer Stimec, Elka Miller, Paul Babyn, Suzanne Schuh, Robert Brison, Louis Lawton, Unni G Narayanan
IMPORTANCE: Lateral ankle injuries without radiographic evidence of a fracture are a common pediatric injury. These children are often presumed to have a Salter-Harris type I fracture of the distal fibula (SH1DF) and managed with immobilization and orthopedic follow-up. However, previous small studies suggest that these injuries may represent ankle sprains rather than growth plate fractures. OBJECTIVES: To determine the frequency of SH1DF using magnetic resonance imaging (MRI) and compare the functional recovery of children with fractures identified by MRI vs those with isolated ligament injuries...
January 2016: JAMA Pediatrics
https://www.readbyqxmd.com/read/26558670/percutaneous-ultrasound-guided-hydrodissection-of-a-symptomatic-sural-neuroma
#16
Ryan R Fader, Justin J Mitchell, Vivek P Chadayammuri, John Hill, Michelle L Wolcott
Symptomatic neuromas of the sural nerve are a rare but significant cause of pain and debilitation in athletes. Presentation is usually in the form of chronic pain and dysesthesias or paresthesias of the lateral foot and ankle. Treatment traditionally ranges from conservative measures, such as removing all external compressive forces, to administration of nonsteroidal anti-inflammatory drugs, vitamin B6, tricyclic antidepressants, antiepileptics, or topical anesthetics. This article reports a case of sural nerve entrapment in a 34-year-old male triathlete with a history of recurrent training-induced right-sided gastrocnemius strains...
November 2015: Orthopedics
https://www.readbyqxmd.com/read/26427003/gastrocnemius-muscle-architecture-and-achilles-tendon-properties-influence-walking-distance-in-claudicants-with-peripheral-arterial-disease
#17
Stephanie Louise King, Natalie Vanicek, Thomas Daniel O'Brien
INTRODUCTION: The extent to which gastrocnemius muscle and Achilles tendon properties contribute to the impaired walking endurance of claudicants is not known. METHODS: Ultrasound images quantified muscle architecture of the lateral and medial gastrocnemius (GL and GM) and were combined with dynamometry during plantarflexor contractions to calculate tendon stress, strain, stiffness, the Young modulus, and hysteresis. Key parameters were entered into multiple regression models to explain walking endurance...
May 2016: Muscle & Nerve
https://www.readbyqxmd.com/read/26409589/chronic-ankle-instability-medial-and-lateral
#18
REVIEW
Markus Knupp, Tamara Horn Lang, Lukas Zwicky, Patrick Lötscher, Beat Hintermann
Ankle ligament injuries are among the most frequent reasons for emergency consultations of athletes. A majority of these can be treated conservatively; however, up to 40% develop chronic ankle instability requiring surgical reconstruction to restore functionality.
October 2015: Clinics in Sports Medicine
https://www.readbyqxmd.com/read/26324333/individuals-with-both-perceived-ankle-instability-and-mechanical-laxity-demonstrate-dynamic-postural-stability-deficits
#19
Cathleen N Brown, Jupil Ko, Adam B Rosen, Katherine Hsieh
BACKGROUND: Chronic ankle instability is a frequent and serious consequence of lateral ankle sprains. The contribution of perceived instability and potential for mechanical laxity to contribute to the overall deficit in dynamic postural stability is unclear. The purpose was to determine if those with mechanical laxity demonstrated significant differences in dynamic postural stability compared to controls, copers and those with perceived instability. METHODS: Of 93 participants, 83 recreationally active individuals were divided into 4 groups: controls, copers, those with perceived instability, and those with both perceived instability and mechanical laxity...
December 2015: Clinical Biomechanics
https://www.readbyqxmd.com/read/26304642/the-consequence-of-a-medial-ankle-sprain-on-physical-and-self-reported-functional-limitations-a-case-study-over-a-5-month-period
#20
Masafumi Terada, Abbey C Thomas, Brian Pietrosimone, Claire E Hiller, Samantha Bowker, Phillip A Gribble
STUDY DESIGN: Case report. BACKGROUND: Little evidence exists about impairments and perceived disability following eversion injury to the deltoid ligament. This case study prospectively examined the neuromuscular, biomechanical, and psychological consequences of a case of a medial ankle sprain. CASE DESCRIPTION: A recreationally active man with a history of a lateral ankle sprain (grade I) was participating in a university Institutional Review Board-approved research study examining the neuromuscular and mechanical characteristics associated with chronic ankle instability...
October 2015: Journal of Orthopaedic and Sports Physical Therapy
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