Anterior Cruciate Ligament
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Anatomic Anterolateral Ligament Reconstruction of the Knee Leads to Overconstraint at Any Fixation Angle
AJSM PreView, published on July 12, 2016 as doi:10.1177/0363546516652607 Winner of the 2016 Excellence In Research Award Anatomic Anterolateral Ligament Reconstruction of the Knee Leads to Overconstraint at Any Fixation Angle Jason M. Schon,* BS, Gilbert Moatshe,*yz MD, Alex W. Brady,* MSc, Raphael Serra Cruz,*§ MD, Jorge Chahla,* MD, Grant J. Dornan,* MSc, || # Travis Lee Turnbull,* PhD, Lars Engebretsen,y MD, PhD, and Robert F. LaPrade,*{ MD, PhD Investigation performed at the Department of Biomedical Engineering of the Steadman Philippon Research Institute, Vail, Colorado, USA Background: Anterior cruciate ligament (ACL) tears are one of the most common injuries among athletes. However, the ability to fully restore rotational stability with ACL reconstruction (ACLR) remains a challenge, as evidenced by the persistence of rotational instability in up to 25% of patients after surgery. Advocacy for reconstruction of the anterolateral ligament (ALL) is rapidly increasing because some biomechanical studies have reported that the ALL is a significant contributor to internal rotational stability of the knee. Hypothesis/Purpose: The purpose of this study was to assess the effect of ALL reconstruction (ALLR) graft fixation angle on knee joint kinematics in the clinically relevant setting of a concomitant ACLR and to determine the optimal ALLR graft fixation angle. It was hypothesized that all fixation angles would significantly reduce rotational laxity compared with the sectioned ALL state. Study Design: Controlled laboratory study. Methods: Ten nonpaired fresh-frozen human cadaveric knees underwent a full kinematic assessment in each of the following states: (1) intact; (2) anatomic single-bundle (SB) ACLR with intact ALL; (3) anatomic SB ACLR with sectioned ALL; (4) anatomic SB ACLR with 7 anatomic ALLR states using graft fixation angles of 0°, 15°, 30°, 45°, 60°, 75°, and 90°; and (5) sectioned ACL and ALL. -
The Anterolateral Ligament of the Knee: What the Radiologist Needs to Know
26 The Anterolateral Ligament of the Knee: What the Radiologist Needs to Know Pieter Van Dyck, MD, PhD1 ElineDeSmet,MD1 Valérie Lambrecht, MD2 Christiaan H. W. Heusdens, MD3 Francis Van Glabbeek, MD, PhD3 Filip M. Vanhoenacker, MD, PhD1,2,4 Jan L. Gielen, MD, PhD1 Paul M. Parizel, MD, PhD1 1 Department of Radiology, Antwerp University Hospital and Address for correspondence Pieter Van Dyck, MD, PhD, Department University of Antwerp, Edegem, Belgium of Radiology, Antwerp University Hospital and University of Antwerp 2 Department of Radiology, Ghent University Hospital, Ghent, Belgium Wilrijkstaat 10, 2650 Edegem, Belgium 3 Department of Orthopaedics, Antwerp University Hospital and (e-mail: [email protected]). University of Antwerp, Edegem, Belgium 4 Department of Radiology, AZ Sint-Maarten, Duffel, Belgium Semin Musculoskelet Radiol 2016;20:26–32. Abstract The anterolateral ligament (ALL) was recently identified as a distinct component of the anterolateral capsule of the human knee joint with consistent origin and insertion sites. Biomechanical studies revealed that the current association between the pivot shift and Keywords an injured anterior cruciate ligament (ACL) should be loosened and that the rotational ► anterolateral component of the pivot shift is significantly affected by the ALL. This may change the ligament clinical approach toward ACL-injured patients presenting with anterolateral rotatory ► anterior cruciate instability (ALRI), the most common instability pattern after ACL rupture. Radiologists ligament rupture should be aware of the importance of the ALL to ACL injuries. They should not overlook ► anterolateral rotatory pathology of the anterolateral knee structures, including the ALL, when reviewing MR instability images of the ACL-deficient knee. -
Chess-Training-Guide.Pdf
Q Chess Training Guide K for Teachers and Parents Created by Grandmaster Susan Polgar U.S. Chess Hall of Fame Inductee President and Founder of the Susan Polgar Foundation Director of SPICE (Susan Polgar Institute for Chess Excellence) at Webster University FIDE Senior Chess Trainer 2006 Women’s World Chess Cup Champion Winner of 4 Women’s World Chess Championships The only World Champion in history to win the Triple-Crown (Blitz, Rapid and Classical) 12 Olympic Medals (5 Gold, 4 Silver, 3 Bronze) 3-time US Open Blitz Champion #1 ranked woman player in the United States Ranked #1 in the world at age 15 and in the top 3 for about 25 consecutive years 1st woman in history to qualify for the Men’s World Championship 1st woman in history to earn the Grandmaster title 1st woman in history to coach a Men's Division I team to 7 consecutive Final Four Championships 1st woman in history to coach the #1 ranked Men's Division I team in the nation pnlrqk KQRLNP Get Smart! Play Chess! www.ChessDailyNews.com www.twitter.com/SusanPolgar www.facebook.com/SusanPolgarChess www.instagram.com/SusanPolgarChess www.SusanPolgar.com www.SusanPolgarFoundation.org SPF Chess Training Program for Teachers © Page 1 7/2/2019 Lesson 1 Lesson goals: Excite kids about the fun game of chess Relate the cool history of chess Incorporate chess with education: Learning about India and Persia Incorporate chess with education: Learning about the chess board and its coordinates Who invented chess and why? Talk about India / Persia – connects to Geography Tell the story of “seed”. -
British Endgame Study News Volume 15 Number 3 Septernber 2010
British Endgame Study News Volume 15 Number 3 Septernber 2010 Edited and. published by John Beasley, 7 St James Road, Harpenden, Herts AL5 4NX ISSN 1363-0318 E-mdil: [email protected] Contents of this issue Editorial 465 Variations on a theme 466 From the world at large 468 News and notices 4'72 This issue- We have a series of related studies from Paul Michelet, the special number looks at the studies of Jirdfich Fritz, and do try the litde trifle atongside before looking inside, by Richard Becker Index 1996-2010. Next time's final issue will be White to play and win accompanied by a composite index of studies by author covering the whole of BESN. I have prepare.d a draft up to and including the present issue which I like to think is conect, but if some kind reader with a complete run of lhe magazine and time to spare is willing to check it for me I shall be most grateful_ Special number 63. It appears that the modetn Mahi encyklopedie.im,a is wrong, and fhat "Jan" Vaniura was in truth Josef Vaniura. Casopis iesbjch iachisti 1911, page 95, "Jos. Vandura" (from Emil Vlasdk and Jaroslav pol6iek, forwarding information from ZdenEk Zdvodnj); chess column in ieskl s/ovo,2Z.i.l922,..los:' (sent to me by Bedrich Formdnek)l obituary in Casopis ieskoslovenskjch iachisttit 1922, pnge 2l, "losef' (ciied by caige, drawn ro my anenrion by Timorhy Whitworrh, and sent to me by the library in Den Haag), The incorrect rlamc "Jan,' appears to derive from an article by FrantiSek Dedrle in Ceskoslovensky iach 1947. -
Usborne Chess Puzzle Answers – Level 2 to Print out This Answer Sheet, Click on ‘File’ and Then ‘Print’ in the Menu at the Top of Your Browser
Usborne Chess Puzzle Answers – level 2 To print out this answer sheet, click on ‘File’ and then ‘Print’ in the menu at the top of your browser. 1. Black should play 1…Bc8, so the Bishop covers the crucial a6–c8 diagonal and stops any of White’s Pawns from advancing. 2. 1…Be2+ forks the King and the Knight.When the King moves out of check, Black can take the Knight. 3.The best move is 1.Ra5+, which will capture the Rook on h5 after the King moves out of check. 1.Rxa6 wins only a Pawn and 1.Re2+ captures the e8 Knight with a skewer attack. 4. 1.Qg7++. Note that if White plays 1.Qa8+, Black blocks with 1…Bf8 and the game continues. 5. 1.Bf6++. 6. 1…Nd3++.The Pawn on e2 is pinned by the black Queen so the white King is trapped in a smothered mate. 7. 1…Nh3+ forces White to play 2.Kh1. Black can then play 2…Bb7++. 8. Black can play 1…Nf3+, shielding the King from check, and at the same time, checking White so that White’s next move, 2.Kh1, is forced. (White’s Queen is pinned by the Rook on a1 and cannot capture the Knight.) Black can now play 2…Rxh2++. 9. If Black plays 1…Bh3,White cannot prevent 2…Qg2++. 10. 1…Nf3+, 2.Kh1 Qxh2++ or 1…Nh3+, 2.Kh1 Bxg2++. 11. 1.Ba7+ Ka8, 2.Qc8++ or 1.Ra8+ Kxa8 (the Rook is sacrificed), 2.Qc8++. 12. 1.Rxa7+ Kxa7, 2.Qa5++. -
Anterolateral Ligament Expert Group Consensus Paper on the Management of Internal Rotation and Instability of the Anterior Cruciate Ligament - Deficient Knee
J Orthopaed Traumatol DOI 10.1007/s10195-017-0449-8 EMERGING TOPIC (REVIEW ARTICLE) Anterolateral Ligament Expert Group consensus paper on the management of internal rotation and instability of the anterior cruciate ligament - deficient knee 1 2 1 Bertrand Sonnery-Cottet • Matthew Daggett • Jean-Marie Fayard • 3 4 5 3 Andrea Ferretti • Camilo Partezani Helito • Martin Lind • Edoardo Monaco • 6 1 7 Vitor Barion Castro de Pa´dua • Mathieu Thaunat • Adrian Wilson • 8 9 10 Stefano Zaffagnini • Jacco Zijl • Steven Claes Ó The Author(s) 2017. This article is published with open access at Springerlink.com Abstract Purpose of this paper is to provide an overview exchange of experiences during the ALL Experts Meeting of the latest research on the anterolateral ligament (ALL) (November 2015, Lyon, France). The ALL is found deep to and present the consensus of the ALL Expert Group on the the iliotibial band. The femoral origin is just posterior and anatomy, radiographic landmarks, biomechanics, clinical proximal to the lateral epicondyle; the tibial attachment is and radiographic diagnosis, lesion classification, surgical 21.6 mm posterior to Gerdy’s tubercle and 4–10 mm technique and clinical outcomes. A consensus on contro- below the tibial joint line. On a lateral radiographic view versial subjects surrounding the ALL and anterolateral the femoral origin is located in the postero-inferior quad- knee instability has been established based on the opinion rant and the tibial attachment is close to the centre of the of experts, the latest publications -
MRI Evalua on of the Normal and Injured Anterolateral Ligament
MRI evaluaon of the normal and injured anterolateral ligament Camilo Partezani Helito, MD Hospital Sírio Libanês Knee Surgery Division, Department of OrthopediC Surgery, University of São Paulo, São Paulo, Brazil • No finanCial disClosures reported 4 Anatomy of the ALL, S. Claes et al. the meniscus, the lateral inferior geniculate artery (LIGA) and vein were invariably found, situated in between the lateral meniscal rim and the ALL at the level of the joint line. More distally, the ALL inserted on the proximal tibia, thereby forming a thick capsular insertional fold. The tibial insertion of the ALL was always clearly situated posterior to Gerdy’s tubercle, with no connecting fibers to the ITB. Grossly, the tibial ALL insertion could be found in the mid- dle of the line connecting Gerdy’s tubercle and the tip of the fibular head. A graphic illustration of the ALL and its neighboring structures is provided in Figs 4 and 5. Quantitative ALL characterization The mean length of the ALL measured in neutral rotation and at 90º flexion was 41.5 6.7 and 38.5 6.1 mm in Æ Æ extension, illustrating some tensioning of the ligament dur- ing mid-flexion. This increase in length during flexion was Fig. 5 Anatomic drawing of the axial view of a right knee at a level significant (P < 0.001). During manipulation of the knee above the meniscal surface. The intra-capsular course of the ALL is joint, we observed a maximal tension of the ALL during appreciated, as well as the triple layered anatomy of the lateral knee. -
Discovered Attacks #Chessathome
Lesson 17: Discovered Attacks Discovered Check If the White knight on e5 magically vanished, Black would be in check from the White queen on e2. Let’s try to find a good move for that knight, knowing that on their next move Black will have to escape the queen check. Suppose White moves the knight to g6. Here it’s attacked by two pawns. However, Black cannot capture the knight. They must block the queen check first. White is then able to use the knight to capture the Black rook on h8. Even better, suppose White moves the knight to c6. Again, Black must block the queen check. The White knight can then capture the Black queen. When a piece moves to uncover a check from a second piece, it’s called a DISCOVERED CHECK. Puzzle Corner How can White use a discovered check to win material? #ChessatHome www.chessinschools.co.uk Discovered Attack This time White wishes his bishop on d3 would disappear. They would then be able to use their queen to capture the undefended Black queen on d4. White moves the White bishop to b5 (check), uncovering the attack on the Black queen. Black would love to move or defend their queen but before doing so must escape the bishop check. This gives White the move they need to capture the Black queen. When a player moves a piece to uncover an attack from a second piece, it’s called a DISCOVERED ATTACK. Double Attacks Grandmaster Test You now know all the dou- This puzzle has ble attacks in chess. -
Bearspaw Junior Chess Club Curriculum
Bearspaw Junior Chess Club Curriculum Levels Basic Concepts Checkmates Strategy Tactics • The Pieces • Check • Shrinking the opposing • Escaping from check • How They Move • Checkmate King’s space Run Away, • Setting up the • Stalemate • Creating Escape Squares Block, board Capture Special Moves • Fool’s mate Basic Opening Strategy • Hanging Piece (Piece En Novice • Castling • Scholar’s • Attack the Center with Prise) • Promotion mate Center Pawns Level 2 • En Passant • Solo/Helper • Knights & Bishops out early mates • Castle for King safety • Computer and • Rooks connected Online Chess • Value of pieces • Two Rooks • Attack f7/f2 • Relative Exchanges Novice • Etiquette or Queen • Piece Preferences • Winning the Exchange • Touch move and Rook (outposts, open files, (capturing more or Level 3 • Release move • Back rank batteries, fianchetto, better pieces) • Tournaments mates a Knight on the rim, • Simplify when up • Using clocks hide or centralize the King) material Copyright @ 2018 Bearspaw Junior Chess Club – All Rights Reserved. Bearspaw Junior Chess Club Curriculum Levels Concepts Checkmates Strategy Tactics Intermediate • Notation • King and • Critical Moves • Forks • Phases of the game Queen • Find 3 moves and • Pins Level 4 • Simple Pawn Structure • King and rate them: (Chains, Isolated, Doubled, Passed) Rook - Good, Openings - Better - Best Compare 2 openings: • Giuoco Piano • Fried Liver Attack Intermediate e4-e5 • Queen and Threat Assessment • Skewer • Bishop Bishop 1. His/her Checks… • Discovered Level 5 • Scotch • Queen and and Your Checks Attack • Danish Knight 2. His/her Captures… • Petrov and your Captures 3. His/her Threats… and your Threats Intermediate More e4-e5 • Rook and The Five Elements • Double Check • Ruy Lopez Bishop 1. -
CHESS the 2012 Spring Powwow Official Merit Badge Worksheet
CHESS The 2012 Spring PowWow Official Merit Badge Worksheet Scout's Name Instructor's Name Scout's Address City State Zip Instructions 1) The Scout is to review the merit badge book before the first week of the PowWow. 2) Bring this worksheet, paper, and pen or pencil each week. 3) Bring a Merit Badge blue card with you on the second week. Requirement Instructions* 1) Requirements 1, 2, 3, 4, and 5 should be covered and should be passed off during the two sessions of the PowWow. 2) Requirement 6 must be completed as homework in the time between the two sessions of the PowWow. *Due to possible time constraints at the PowWow, certain requirements that were originally planned to be completed in class may need to be completed as homework. Please LISTEN to ALL INSTRUCTIONS in class to be aware of any changes. Requirement 1 Initial What is the history of the game of chess? Why is it considered a game of planning and strategy? Requirement 2 Initial Discuss with your merit badge counselor the following: a. The benefits of playing chess, including developing critical thinking skills, concentration skills, and decision-making skills, and how these skills can help you in other areas of your life b. Sportsmanship and chess etiquette Requirement 3 Initial Demonstrate to your counselor that you know each of the following. Then, using Scouting's Teaching EDGE, teach the following to a Scout who does not know how to play chess: a. The name of each chess piece b. How to set up a chessboard c. -
The Anterolateral Ligament Is a Secondary Stabilizer in the Knee Joint
811.BJBJR Follow us @BoneJointRes Freely available online OPEN ACCESS BJR KNEE The anterolateral ligament is a secondary stabilizer in the knee joint A VALidated COMPUtatiONAL MODEL OF THE BIOmechanicaL EFFects OF A DEFicient ANTERIOR crUciate LIGAMENT AND ANTEROLateraL LIGAMENT ON KNEE JOINT Kinematics K-T. Kang, Objectives Y-G. Koh, The aim of this study was to investigate the biomechanical effect of the anterolateral liga- K-M. Park, ment (ALL), anterior cruciate ligament (ACL), or both ALL and ACL on kinematics under C-H. Choi, dynamic loading conditions using dynamic simulation subject-specific knee models. M. Jung, Methods J. Shin, Five subject-specific musculoskeletal models were validated with computationally predicted S-H. Kim muscle activation, electromyography data, and previous experimental data to analyze effects of the ALL and ACL on knee kinematics under gait and squat loading conditions. Department of Orthopedic Surgery, Results Arthroscopy and Joint Anterior translation (AT) significantly increased with deficiency of the ACL, ALL, or both Research Institute, structures under gait cycle loading. Internal rotation (IR) significantly increased with defi- Yonsei University ciency of both the ACL and ALL under gait and squat loading conditions. However, the defi- ciency of ALL was not significant in the increase of AT, but it was significant in the increase College of Medicine, of IR under the squat loading condition. Seoul, South Korea Conclusion The results of this study confirm that the ALL is an important lateral knee structure for knee joint stability. The ALL is a secondary stabilizer relative to the ACL under simulated gait and squat loading conditions. -
1983 BCF Congress Programme, Southport
^Nsvfe*****''' ' Grieveson Grant The British Chess Championships K'“ The 70th Annual Championships of the British Chess Federation KING GEORGE V COLLEGE SCARISBRICK NEW ROAD, SOUTHPORT by kind permission of the Headmaster D. J. Arnold, Esq. M.A. and with the assistance of the Metropolitan Borough of Sefton MONDAY 8 to SATURDAY 20 AUGUST, 1983 Programme £1 Grieveson, Grant & Co. The Sponsors of the Congress Grieveson, Grant of the Stock Exchange, London, are sponsoring the British Chess Federation’s Annual Congress for the sixth consecutive year. The B.C.F. are grateful for the generous prize fund, and the benefits that have accrued to the Congress from a continuing relationship with Grieveson, Grant. With some 650 partners and employees, Grieveson, Grant is one of the largest firms of stockbrokers in the U.K., and it provides a wide range of services to many different types of customers both in this country and abroad. Many of its members service the large institutions, such as pension funds and insurance companies; others manage the portfolios of private investors; the research department studies companies, industries, and the economy as a whole; the clients’ orders must be executed by experienced dealers on the floor of The Stock Exchange itself; the corporate finance department brings legal and negotiating skills to advising companies on their stock market affairs; and the expansion and maintenance of the computer involves a major department of its own. The firm has put increasing emphasis on several areas in recent years: It runs eight unit trusts, of which three specialise in overseas markets (North America, the Pacific Area, and the Continent of Europe) and two in U.K.